Curriculum Vitae

Bjørn Clausen, B.Sc., M.Sc., Ph.D.
Technical Staff Member, SMARTS Instrument Scientist
Lujan Center (LANSCE-LC)
Los Alamos National Laboratory
P.O. Box 1663, Mail Stop H805
Los Alamos, NM 87545
Office: +1 (505) 667-2944
Fax: +1 (505) 665-2676
E-mail: clausen@lanl.gov
Web: http://public.lanl.gov/clausen/

 Bjørn Clausen

Research Interests and Experience


In-situ internal and residual strain measurements using neutron diffraction. Modeling of polycrystal deformation using self-consistent models. Development of polycrystal deformation models for predicting internal and residual stresses/strains in polycrystalline materials. Validating polycrystal deformation models using diffraction measurements of elastic lattice strains and texture development. Employing polycrystal deformation models and finite element models to interpret diffraction measurement results and determine microstructural/mechanical property relationship.

Professional Experience

October 2002 to present:
Technical Staff Member. SMARTS Instrument Scientist at the Lujan Center, Los Alamos National Laboratory, Los Alamos, New Mexico, USA.

January 2001 to October 2002:
Senior Postdoctoral Scholar in Material Science, California Institute of Technology, Pasadena, California, USA.
July 2002 to September 2002:
Visiting Faculty Affiliate, T-3 (Computational Fluid Dynamics), Los Alamos National Laboratory, Los Alamos, New Mexico, USA.
July 2001 to September 2001:
Visiting Faculty Affiliate, MST-8 (Structure/Property Relations), Los Alamos National Laboratory, Los Alamos, New Mexico, USA.

September 1997 to December 2000:
Postdoctoral Research Associate at the Manuel Lujan Jr. Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico, USA.

April 1997 to September 1997:
Graduate student at the Manuel Lujan Jr. Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico, USA.

Education

February 1994 to April 1997:
Ph.D. in Mechanical Engineering/Materials Science, Technical University of Denmark/ Risø National Laboratory. Thesis: "Characterisation of Polycrystal Deformation by Numerical Modelling and Neutron Diffraction Experiments." (RIS-R-985.pdf)

September 1991 to July 1993:
M.Sc. in Mechanical Engineering, Aalborg University. Thesis: Basic Research in Platelet Reinforced Ceramic.

February 1988 to February 1991:
B.Sc. in Mechanical Engineering, Aarhus Teknikum. Thesis: Construction/Optimization of a Crane.

Publications

  1. D.W. Brown, T.A. Sisneros, B. Clausen, S. Abeln, M.A.M. Bourke, B.G. Smith, M.L. Steinzig, C.N. Tomé and S.C. Vogel, "Development of Intergranular Thermal Residual Stresses in Beryllium During Cooling from Processing Temperatures", Acta Mater., vol. 57(4), pp. 972-979, 2009. (pdf)

  2. D. Mari, B. Clausen, M.A.M. Bourke and K. Buss, "Measurement of Residual Thermal Stress in WC-Co by Neutron Diffraction", Int. J. Refractory Metals Hard Mater, vol. 27(2), pp. 282-287, 2009. (pdf)

  3. A.D. Krawitz, A.M. Venter, E.F. Drake, S.B. Luyckx and B. Clausen, "Phase Response of WC-Ni to Cyclic Compressive Loading and its Relation to Toughness", Int. J. Refractory Metals Hard Mater, vol. 27(2), pp. 313-316, 2009. (pdf)

  4. N. Jia, R.L. Peng, D.W. Brown, B. Clausen and Y.D. Wang, "Tensile Deformation Behavior of Duplex Stainless Steel Studied by In-Situ Time-of-Flight Neutron Diffraction", Metall. Trans. A, vol. 39(13), pp. 3134-3140, 2008. (pdf)

  5. S. Cheng, X.-L. Wang, Z. Feng, B. Clausen, H. Choo, and P.K. Liaw, "Probing the Characteristic Deformation Behaviors of Transformation-Induced Plasticity Steels", Metall. Trans. A, vol. 39(13), pp. 3105-3112, 2008. (pdf)

  6. E-W. Huang, R. Barabash, N. Jia, Y.-D. Wang, G.E. Ice, B. Clausen, J. Horton and P.K. Liaw, "Slip-System-Related Dislocation Study from In-Situ Neutron Measurements", Metall. Trans. A, vol. 39(13), pp. 3079-3088, 2008. (pdf)

  7. D.R. Kammler, M.A. Rodriguez, R.G. Tissot, D.W. Brown, B. Clausen and T.A. Sisneros, "In-Situ Time-of-Flight Neutron Diffraction Study of High-Temperature α-to-β Phase Transition in Elemental Scandium", Metall. Trans. A, vol. 39(12), pp. 2815-2819, 2008. (pdf)

  8. L. Wu, S.R. Agnew, D.W. Brown, G.M. Stoica, B. Clausen, A. Jain, D.E. Fielden and P.K. Liaw, "Internal Stress Relaxation and Load Redistribution During the Twinning-Detwinning-dominated cyclic deformation of a wrought magnesium alloy, ZK60A", Acta Mater., vol. 56(4), pp. 3699-3707, 2008. (pdf)

  9. T. Wilson, B. Clausen, T. Proffen, J. Elle and D.W. Brown, "In-situ Neutron Scattering Measurement of Stress-Strain Behavior of a Bulk Metallic Glass", Metall. Trans. A, vol. 39(8), pp. 1942-1946, 2008. (pdf)

  10. E.-W. Huang, R.I. Barabash, Y. Wang, B. Clausen, L. Li, P.K. Liaw, G.E. Ice, Y. Ren, H. Choo, L.M. Pike, D.M. Klarstrom, "Plastic Behavior of a Nickel-Based Alloy under Monotonic-Tension and Low-Cycle-Fatigue Loading", Int. J. Plasticity, vol. 24(8), pp. 1440-1456, 2008. (pdf)

  11. B. Clausen, C.N. Tomé, D.W. Brown and S.R. Agnew, "Reorientation and Stress Relaxation due to Twinning: Modeling and Experimental Characterization for Mg", Acta Mater., vol. 56(11), pp. 2456-2468, 2008. (pdf)

  12. V.B. Krishnan, R.M. Manjeri, B. Clausen, D.W. Brown and R. Vaidyanathan, "Analysis of Neutron Diffraction Spectra Acquired in-situ During Mechanical Loading of Shape Memory NiTiFe at Low Temperatures", Mat. Sci. & Eng. A, vol. 481-482, pp. 3-10, 2008. (pdf)

  13. W. Woo, H. Choo, M.B. Prime, Z. Feng and B. Clausen, "Microstructure, Texture and Residual Stress in a Friction-Stir-Processed AZ31B Magnesium Alloy", Acta Mater., vol. 56(8), pp. 1701-1711, 2008. (pdf)

  14. L. Wu, A. Jain, D.W. Brown, G.M. Stoica, S.R. Agnew, B. Clausen, D.E. Fielden and P.K. Liaw, "Twinning-Detwinning Behavior During the Strain-Controlled Low-Cycle Fatigue Testing of a Wrought Magnesium Alloy, ZK60A", Acta Mater., vol. 56(4), pp. 688-695, 2008. (pdf)

  15. E.N. Brown, P.J. Rae, D.M. Dattelbaum, B. Clausen and D.W. Brown, "In-situ Measurement of Crystalline Lattice Strains in Polytetrafluoroethylene", Experimental Mechanics, vol. 48, pp. 119-131, 2008. (pdf)

  16. E.-W. Huang, B. Clausen, Y. Wang, H. Choo, P.K. Liaw, M.L. Benson, L.M. Pike, D.L. Klarstrom, "A Neutron-Diffraction Study of the Low-Cycle Fatigue Behavior of HASTELLOY C-22HSTM Alloy", Int. J. Fatigue, vol. 29, pp. 1812-1819, 2007. (pdf)

  17. J.W. Paggett, A.D. Krawitz, E.F. Drake, M.A.M. Bourke, B. Clausen, D.W. Brown, "In-Situ Response of WC-Ni Composites Under Compressive Load", Metall. Trans. A, vol. 38(7), pp. 1638-1648, 2007. (pdf)

  18. P. Pagliaro, M.B. Prime, B. Zuccarello, B. Clausen, T.R. Watkins, "Validation Specimen for Contour Method Extension to Multiple Residual Stress Components", Proceedings of the 13th International Conference on Experimental Mechanics, Experimental Analysis of Nano and Engineering Materials and Structures, Alexandroupolis, Greece, July 1-6, paper no. 246, 2007. (pdf, pre-print)

  19. W. Woo, Z. Feng, X.-L. Wang, D. W. Brown, B. Clausen, K. An, H. Choo, C. R. Hubbard and S. A. David, "In Situ Neutron Diffraction Measurements of Temperature and Stresses During Friction Stir Welding of 6061-T6 Aluminium Alloy", Science and Technology of Welding and Joining, vol. 12(4), pp. 298-303, 2007 (pdf)

  20. M.R. Daymond, M. Preuss and B. Clausen, "Evidence of Variation in Slip Mode in a Polycrystalline Nickel-Base Superalloy with Change in Temperature from Neutron Diffraction Strain Measurements", Acta Materialia, vol. 55(9), pp. 3089-3102, 2007 (pdf)

  21. E.N. Brown, D.M. Dattelbaum, D.W. Brown, P.J. Rae and B. Clausen, "A New Strain Path to Inducing Phase Transitions in Semi-Crystalline Polymers", Polymer, vol. 48, pp. 2531-2536, 2007 (pdf)

  22. W. Woo, Z. Feng, X.-L. Wang, D.W. Brown, B. Clausen, C.R. Hubbard, H. Choo and S.A. David, "Quasi-Steady State Principle and In-Situ Real-Time Investigation of Transient Strains in 6061-T6 Al Alloy using Neutron Diffraction", Key Engineering Materials, vol. 345-346, pp. 797-800, 2007 (pdf)

  23. E.-W. Huang, Y. Wang, B. Clausen, M.L. Benson, H. Choo, P.K. Liaw and L.M. Pike, "A Nondestructive hkl-Planes Analysis of a Nano-Precipitate-Strengthening Aloy Study", Key Engineering Materials, vol. 345-346, pp. 1311-1314, 2007 (pdf)

  24. K. Tao, H. Choo, H. Li, B. Clausen, J.-E. Jin and Y.-K. Lee, "Transformation-Induced Plasticity in an Ultrafine-Grained Steel: An In Situ Neutron Diffraction Study", Applied Physics Letters, vol. 90(10), 101911, 2007 (pdf)

  25. Y. Zhao, J. Zhang, B. Clausen, T.D. Shen, G.T. Gray and L. Wang, "Thermomechanics of Nanocrystalline Nickel under High Pressure-Temperature Conditions", Nano Letters, vol. 7(2), pp. 426-432, 2007. (pdf)

  26. W. Woo, H. Choo, D.W. Brown, B. Clausen, Z. Feng, and P.K. Liaw, "Residual Strain Measurements in a Friction-Stir Processed AZ31B Magnesium Alloy Using Neutron Diffraction", Materials Science Forum, vol. 539-543, pp. 3795-3800, 2007. (pdf)

  27. D.W. Brown, A. Jain, S.R. Agnew and B. Clausen, "Twinning and Detwinning During Cyclic Deformation of Mg Alloy AZ31B", Materials Science Forum, vol. 539-543, pp. 3407-3413, 2007. (pdf)

  28. T.M. Holden, H. Suzuki, D.G. Carr, M.I. Ripley and B. Clausen, "Stress Measurements in Welds: Problem Areas", Mat. Sci. & Eng. A, vol. 437, pp. 33-37, 2006. (pdf)

  29. J.W. Paggett, A.D. Krawitz, E.F. Drake, M.A.M. Bourke, V. Livescu, B. Clausen and D.W. Brown, "In Situ Loading Response of WC-Ni: Origins of Toughness", Int. J. Refractory Metals Hard Mater, vol. 24, pp. 122-128, 2006 (pdf)

  30. C.R. Rathod, B. Clausen, M.A.M. Bourke and R. Vaidyanathan, "Neutron Diffraction Investigation of Hysteresis Reduction and Increase in Linearity in the Stress-Strain Response of Superelastic NiTi", Applied Physics Letters vol. 88(20), 201919, 2006 (pdf)

  31. B. Clausen, M.A.M Bourke, D.W. Brown and E. Üstündag, "Load Sharing in Tungsten Fiber Reinforced Kanthal Composites", Mat. Sci. & Eng. A, vol. 421(1-2), pp. 9-14, 2006. (pdf)

  32. B. Clausen, S.-Y. Lee, E. Üstündag, C.P. Kim, D.W. Brown and M.A.M. Bourke, "Compressive Deformation of In Situ Formed Bulk Metallic Glass Composites", Scripta Materialia, vol. 54, pp. 343-347, 2006. (pdf)

  33. K. Tao, H. Choo, H. Li, B. Clausen, D.W. Brown, J.E. Jin, and Y.K. Lee, "In Situ Neutron Diffraction Study on the Mechanical Behavior of an Ultra-Fine-Grained Steel", Materials Science Forum, vol. 426-432, pp. 639-644, 2006. (pdf)

  34. V. Livescu, B. Clausen, J.W. Paggett, A.D. Krawitz, E.F. Drake, M.A.M. Bourke, "Measurement and Modeling of Room Temperature Co-Deformation in WC-10 wt.%% Co", Mat. Sci. & Eng. A, vol. 399(1-2), pp. 134-140, 2005. (pdf)

  35. S.-Y. Lee, B. Clausen, E. Üstündag, H. Choi-Yim, C.C. Aydiner, M.A.M. Bourke, "Compressive Behavior of Wire Reinforced Bulk Metallic Glass Matrix Composites", Mat. Sci. & Eng. A, vol. 399(1-2), pp. 128-133, 2005. (pdf)

  36. C.C. Aydiner, E. Üstündag, B. Clausen, J.C. Hanan, R.A. Winholtz, M.A.M. Bourke, A. Peker, "Residual Stresses in a Bulk Metallic Glass-Stainless Steel Composite", Mat. Sci. & Eng. A, vol. 399(1-2), pp. 107-113, 2005. (pdf)

  37. J.C. Hanan, S. Mahesh, E. Üstündag, I.J. Beyerlein, G.A. Swift, B. Clausen, D.W. Brown, M.A.M. Bourke, "Strain Evolution After Fiber Failure in a Single-Fiber Metal Matrix Composite Under Cyclic Loading", Mat. Sci. & Eng. A, vol. 399(1-2), pp. 33-42, 2005. (pdf)

  38. S. Ma, D.W. Brown, B. Clausen, V. Seetharaman and B.S. Majumdar, "Internal Stress Evolution in a [001] Oriented Directionally Solidified Superalloy During Creep", proceedings of Materials Science and Technology 2005, Pittsburgh, PA, United States, pp. 213-229, 2005.

  39. T.A. Saleh, B. Clausen, D.W. Brown, H. Choo, P.K. Liaw, M.A.M. Bourke, S.C. Vogel, R.A. Buchanan, D.L. Klarstrom, "In-Situ Neutron Diffraction Studies of Carbide-Matrix Interactions in HAYNES 230 Nickel Based Superalloy", Materials Research Society Symposium Proceedings, vol. 840, pp.187-192, 2005. (pdf, preprint)

  40. T. Proffen, K.L. Page, S.E. McLain, B. Clausen, T.W. Darling, J.A. TenCate, S.-Y. Lee, E. Üstündag, "Atomic Pair Distribution Function Analysis of Materials Containing Crystalline and Amorphous Phases", Zeitschrift für Kristallographie, vol. 220(12), pp. 1002-1008, 2005. (pdf)

  41. S. Li, M.A.M Bourke, I.J. Beyerlein, D.J. Alexander, B. Clausen, "Finite Element Analysis of the Plastic Deformation Zone and Working Load in Equal Channel Angular Extrusion", Mat. Sci. & Eng. A, vol. 382(1-2), pp. 217-236, 2004. (pdf)

  42. C. Larsson, B. Clausen, T. Holden, M.A.M. Bourke, "Measurements and Predictions of Strain Pole Figures for Uniaxially Compressed Stainless Steel", Scripta Materialia, vol. 51, pp.571-575, 2004. (pdf)

  43. T.W. Darling, J.A. TenCate, D.W. Brown, B. Clausen, and S.C. Vogel, "Neutron Diffraction Study of the Contribution of Grain Contacts to Nonlinear Stress-strain Behavior", Geophysical Res. Let., vol. 31(16), p. L16604, 2004. (pdf)

  44. C.R. Rathod, V. Livescu, B. Clausen, M.A.M. Bourke, W.U. Notardonato, M. Femminineo, and R. Vaidyanathan, "Neutron Diffraction Characterization of Residual Strain in Welded Inconel 718 For NASA Space Shuttle Flow Liners", AIP Conference Proceedings, vol. 711, pp. 167-175, 2004. (pdf)

  45. V. Livescu, T.R. Woodruff, B. Clausen, T. Sisneros, M.A.M. Bourke, W.U. Notardonato, and R. Vaidyanathan, "Design and Rationale for an In-situ Cryogenic Deformation Capability at a Neutron Source", AIP Conference Proceedings, vol. 711, pp. 83-89, 2004. (pdf)

  46. B. Clausen, T. Leffers, T. Lorentzen, "On the Proper Selection of Reflections for the Measurement of Bulk Residual Stresses by Diffraction Methods", Acta Materialia, vol. 51(20), pp.6181-6188, 2003. (pdf)

  47. D.W. Brown, M.A.M. Bourke, B. Clausen, T.M. Holden, C.N. Tomé, R. Varma, "A Neutron Diffraction and Modeling Study of Uniaxial Deformation in Polycrystalline Beryllium", Metall. Trans. A, vol. 34(7), pp. 1439-1449, 2003. (pdf)

  48. B. Clausen, S.-Y. Lee, E. Üstündag, C.C. Aydiner, R.D. Conner, M.A.M. Bourke, "Compressive Yielding of Tungsten Fiber Reinforced Bulk Metallic Glass Composites", Scripta Materalia, vol. 49(2), pp. 123-128, 2003. (pdf)

  49. R.C. Rogan, E. Üstündag, B. Clausen, M.R. Daymond, "Texture and Strain Analysis of the Ferroelastic Behavior of Pb(Zr,Ti)O3 by In Situ Neutron Diffraction", J. Appl. Phys., vol. 93(7), pp. 4104-4111, 2003. (pdf)

  50. G.A. Swift, E. Üstündag, B. Clausen, M.A.M. Bourke and H.-T. Lin, "High-Temperature Elastic Properties of In Situ-Reinforced Si3N4", Applied Physics Letters., vol. 82(7), pp. 1039-1041, 2003. (pdf)

  51. G. Vaschenko, C.S. Menoni, D. Patel, C.N Tomé, B. Clausen, N.F. Gardner, J. Sun, W. Gotz, H.M. Ng, A.Y. Cho, "Nonlinear Polarization in Nitrides Revealed with Hydrostatic Pressure", Physica Status Solidi B, vol. 235(2), pp.238-247, 2003. (pdf)

  52. G.A. Swift, E. Üstündag, B. Clausen, M.A.M. Bourke, H.-T. Lin and C.W. Li, "High-Temperature Deformation of Silicon Nitride and its Composites", Ceramic Trans., vol. 142, pp. 145-157, 2003.

  53. S.C. Vogel, D.J. Alexander, I.J. Beyerlein, M.A.M. Bourke, D.W. Brown, B. Clausen, C.N. Tomé, R.B. Von Dreele, C. Xu, T.G. Langdon, "Investigation of Texture in ECAP Materials Using Neutron Diffraction", Materials Science Forum, vol. 426(4), pp. 2661-2666, 2003. (pdf)

  54. R.C. Rogan, E. Üstündag, B. Clausen, M.R. Daymond, "In-situ neutron diffration study of the ferroelastic behavior of Pb(Zr,Ti)O-3", Ceramic Trans., vol. 136, pp. 65-74, 2003.

  55. M.E. Manley, B. Fultz, D.W. Brown, B. Clausen, A.C. Lawson, J.C. Cooley, W.L. Hults, R.J. Hanrahan, J.L. Smith, D.J. Thoma, "Microstructural Strain Energy of Alpha-Uranium Determined by Calorimetry and Neutron Diffractometry", Physical Review B, vol. 66(2), p. 024117/1-7, 2002. (pdf)

  56. T. Lorentzen, M.R. Daymond, B. Clausen and C.N. Tomé, "Lattice Strain Evolution During Cyclic Loading of Stainless Steel", Acta Mater., vol. 50(6), pp. 1627-38, 2002. (pdf)

  57. J.C. Hanan, B. Clausen, G.A. Swift, E. Üstündag, I.J. Beyerlein, J.D. Almer, U. Lienert and D.R. Haeffner, "Microscale Residual Strains in Monolayer Unidirectional Fiber Composites", ECRS 6, Mater. Sci. Forum, vol. 404(4), pp. 913-918, 2002. (pdf)

  58. J.C. Hanan, E. Üstündag, B. Clausen, M. Sivasambu, I.J. Beyerlein, D.W. Brown and M.A.M. Bourke, "Residual Strain Evolution During the Deformation of Single Fiber Metal Matrix Composites", ECRS 6, Mater. Sci. Forum, vol. 404(4) pp. 907-912, 2002. (pdf)

  59. B. Clausen, R.C. Rogan, E. Üstündag, M.R. Daymond and V. Knoblauch, "Ferroelastic Behavior of PZT-based Ferroelectric Ceramics", ECRS 6, Mater. Sci. Forum, vol. 404(4), pp. 413-418, 2002. (pdf)

  60. B. Clausen, S.-Y. Lee, E. Üstündag, C.P. Kim, D.W. Brown and M.A.M. Bourke, "Deformation of In Situ-Reinforced Bulk Metallic Glass Matrix Composites", ECRS 6, Mater. Sci. Forum, vol. 404(4), pp. 553-558, 2002. (pdf)

  61. G. Vaschenko, D. Patel, C.S. Menoni, N.F. Gardner, J. Sun, W. Gotz, C.N. Tomé and B. Clausen, "Significant Strain Dependence of Piezoelectric Constants in InxGa1-xN/GaN Quantum Wells", Physical Review B, vol. 64(24), p.241308/1-4, 2001. (pdf)

  62. G. Vaschenko, D. Patel, C.S. Menoni, N.F. Gardner, J. Sun, W. Gotz, C.N. Tomé and B. Clausen, "Pressure Dependence of Piezoelectric Field in InGaN/GaN Quantum Wells", Physica Status Solidi B, vol. 228(1), p.73-6E, 2001.

  63. D. Dragoi, E. Üstündag, B. Clausen and M.A.M. Bourke, "Investigation of Thermal Residual Stresses in Tungsten-Fiber/Bulk Metallic Glass Matrix Composites", Scripta Mat., vol. 45(2), pp. 245-252, 2001. (pdf)

  64. B. Clausen and M.A.M. Bourke, "Lattice Plane Response During Tensile Loading Of An Aluminum 2% Magnesium Alloy", Metall. Trans. A, vol. 32(3), pp. 691-694, 2001 (pdf)

  65. E. Üstündag, D. Dragoi, B. Clausen, D.W. Brown, M.A.M. Bourke, D.K. Balch and D.C. Dunand, "Internal Stresses in Bulk Metallic Glass Matrix Composites", Proceedings of the Supercooled Liquid, Bulk Glassy and Nanocrystalline States of Alloys Symposium, Boston, MA, USA, pp. L9.3.1-6, 2000.

  66. B. Clausen, E. Üstündag and M.A.M. Bourke, "Investigation of the Reduction of NiAl2O4", Adv. X-Ray Anal., vol. 44, pp. 32-37, 2001

  67. D. Dragoi, E. Üstündag, B. Clausen and M.A.M. Bourke, "Residual Stresses in Tungsten / Bulk Metallic Glass Composites", Adv. X-Ray Anal., vol. 44, pp. 168-173, 2001.

  68. D.W. Brown, R. Varma, M.A.M. Bourke, P. Burgardt, B. Clausen, S. Spooner, T. Ely and M.R. Daymond, "Residual Strains In A Pigma Welded Beryllium Ring", Adv. X-Ray Anal., vol. 44, pp. 162-167, 2001.

  69. S. Jayawardana, G.V. Garcia, H. Nakotte, B. Clausen and M.A.M. Bourke. "Finite Element Modeling of Anisotropic Properties of Cu-Ag Metal Matrix Composites", IEEE Transactions On Applied Superconductivity, vol. 10(1) pp. 1281-1283, 2000. (pdf)

  70. E. Üstündag, B. Clausen and M.A.M. Bourke, "Neutron Diffraction Study of the Reduction of NiAl2O4", Applied Physics Lett., vol. 76(6), pp. 694-696, 2000. (pdf)

  71. B. Clausen, T. Leffers, T. Lorentzen, O.B. Pedersen and P. Van Houtte, "The Resolved Shear Stress on the Non-Active Slip Systems in Taylor/Bishop-Hill Models for FCC Polycrystals", Scripta Materialia, vol. 42(1), pp. 91-96, 2000. (pdf)

  72. E. Üstündag, J.C. Hanan, B. Clausen, and M.A.M. Bourke, " Investigation of the Reduction of NiAl2O4 Using Neutron Powder Diffraction", ICRS-6, Proceedings of the Sixth International Conference on Residual Stresses, (2000).

  73. E. Üstündag, C.C. Aydiner, D. Dragoi, B. Clausen, M.A.M. Bourke and R.A. Winholtz, "Residual Stresses in Bulk Metallic Glasses and Composites", ICRS-6, Proceedings of the Sixth International Conference on Residual Stresses, (2000).

  74. P. Rangaswamy, M.B. Prime, M. Daymond, M.A.M. Bourke, B. Clausen, H. Choo, N. Jayaraman. "Comparison of Residual Strains measured by X-ray and Neutron diffraction in Titanium Matrix Composites." Mat. Sci. & Eng. A, vol. 259(2), pp. 209-219, 1999. (pdf)

  75. B. Clausen, T. Lorentzen, M.A.M. Bourke and M.R. Daymond. "Lattice Strain Evolution During Uniaxial Loading of Stainless Steel", Mat. Sci. & Eng. A, vol. 259(1), pp. 17-24, 1999. (pdf)

  76. B.K. Kad, R.J. Asaro, B. Clausen, M.A.M. Bourke, "Neutron Diffraction Measurements of Internal Strains in TiAl-based Alloys", Gamma Titanium Aluminides 1999, pp.169-174, 1999.

  77. E. Üstündag, B. Clausen, J.C. Hanan, M.A.M. Bourke, R.A. Winholtz and A. Peker, "Residual Stresses in Bulk Metallic Glasses due to Differential Cooling or Thermal Tempering", Bulk Metallic Glasses, W. L. Johnson, C.T. Liu and A. Inoue (eds.), MRS Symp. Proc., vol. 554, pp. 431-436. Materials Research Society, Warrendale, Pennsylvania, 1999.

  78. E. Üstündag, R.H. Woodman, J.C. Hanan, B. Clausen, T. Hartmann and M.A.M. Bourke, "Neutron Diffraction Studies of the Partial Reduction of NiAl2O3: Phase and Strain Evolution", Ceramic Transactions, vol. 94, pp.537-548, 1999.

  79. B. Clausen and M.A.M. Bourke, "Microstructural Stress Strain Inhomogeneity in MMCs", in Nondestructive Evaluation (NDE) and Material Properties IV, pp.15-19, Proceedings of the TMS Annual Meeting 1999.

  80. G. Winther, T. Leffers and B. Clausen, "Revision of the Concept of 1-Site Models." Proceedings. ICOTOM-12, Ed. J.A. Szpunar. Vol. 1, pp. 399-404, 1999.

  81. M.A.M. Bourke, D.W. Brown, B. Clausen, H. Choo, P. Rangaswamy, R. Vaidyanathan, "Neutron Diffraction Studies of Polycrystalline Deformation in Engineering Materials", Neutron News, vol. 10(4), 1999.

  82. B. Clausen, T. Lorentzen and T. Leffers, "Self-consistent Modelling of the Plastic Deformation of FCC Polycrystals and its Implications for Diffraction Measurements of Internal Stresses." Acta Mater., vol. 46(9), pp. 3087-3098, 1998. (pdf)

  83. T. Lorentzen, T. Faurholdt, B. Clausen and J. Danckert. "Characterisation of Residual Stresses Generated During Inhomogeneous Plastic Deformation." Int. Journal of Strain Analysis for Eng. Design, vol. 33(3), pp. 243-252, 1998. (pdf)

  84. B. Clausen, E. Üstündag, P. Rangaswamy, M.A.M. Bourke, S.L. Sass and T.J. Barbieri. "Investigation of the Reduction of NiAl2O4 - II: X-ray Diffraction Studies", Ceram. Eng. & Sci. Proceedings (ed. D. Bray), vol. 19(3), pp. 557-564, 1998.

  85. E. Üstündag, J.C. Hanan, B. Clausen, M.A.M. Bourke, S.L. Sass and T.J. Barbieri. "Investigation of the Reduction of NiAl2O4 - I: Neutron Diffraction Studies", Ceram. Eng. & Sci. Proceedings (ed. D. Bray), vol. 19(3), pp. 549-556, 1998.

  86. T. Lorentzen, and B. Clausen. "Self-consistent Modelling of Lattice Strain Response and Development of Inter granular Residual Strains. Proceedings of the 5th International Conference on Residual Stresses (ICRS-5), Linkoeping, Sweden. Edited by T. Eriksson, M. Oden and A. Anderson, Institute of Technology, Linkoeping University, pp. 454-459, 1998.

  87. T. Lorentzen, T. Leffers and B. Clausen, "Polycrystal Models and Intergranular Stresses", in Modeling of Structure and Mechanics of Materials from Microscale to Product (Eds. J.V. Carstensen et al.). Risø National Laboratory, Roskilde, 1998, pp. 345-354.

  88. B. Clausen and T. Lorentzen. "Experimental Evaluation of a Polycrystal Deformation Modelling Scheme using Neutron Diffraction Measurements." Metall. Trans. A, vol. 28, pp. 2537-2541, 1997. (pdf)

  89. M.R. Daymond, M.A.M. Bourke, R. Von Dreele, B. Clausen and T. Lorentzen. "Use of Rietveld Refinement for Elastic Macrostrain Determination and for the Evaluation of Plastic Strain History from Diffraction Spectra." J. App. Phys., vol. 82(4), pp. 1554-1562, 1997. (pdf)

  90. B. Clausen. "Characterisation of Polycrystal Deformation by Numerical Predictions and Neutron Diffraction Experiments." Thesis, Risø-R-985(EN) Risø National Laboratory, DK-4000 Roskilde, Denmark, 1997. (RIS-R-985.pdf)

  91. B. Clausen and T. Lorentzen. "A Self-consistent Model for Polycrystal Deformation, Description and Implementation." Risø-R-970(EN) Risø National Laboratory, DK-4000 Roskilde, Denmark, 1997. (RIS-R-970.pdf) Sc_model.zip Taylor_Sachs.zip

  92. P.S. From, R. Pyrz, B. Clausen and E.Ø. Nielsen. "Indentation and Acoustic Emission in Filtration Processed Platelet Reinforced Ceramic." Mat. Sci. & Eng. A, vol. 197, pp. 231-236, 1995. (pdf)

Published Abstracts
  1. C.R. Rathod, S.B. Shmalo, B. Clausen, M.A.M. Bourke and R. Vaidyanathan, "Spatially Resolved Neutron Diffraction Measurement of Heterogeneous Stress-Induced Phase Transformation in a Superelastic NiTi Disc", JOM, vol. 56(11), p.349, 2004.

  2. S.B. Shmalo, C.R. Rathod, T.R. Woodruff, V. Livescu, B. Clausen, M.A.M. Bourke, W.U. Notardonato and R. Vaidyanathan, "Neutron Diffraction Investigation of NiTiFe Shape-Memory Alloys During Mechanical Loading at Cryogenic Temperatures", JOM, vol. 56(11), p.348, 2004.

  3. F. Tang, I.E. Anderson, D.W. Brown, T.A. Sisneros, B. Clausen and M.A.M. Bourke, "In-Situ Neutron Diffraction Measurement of Phase Transformation and Stress Evolution in Al/Al-Cu-Fe Composites During Vacuum Hot Pressing", JOM, vol. 56(11), p.348, 2004.

  4. S.C. Vogel, D.J. Alexander, M.A.M. Bourke, D.W. Brown, B. Clausen, T.A. Sisneros, E.J. Lavernis and D.B. Witkin, "Determination of Deformation Mechanisms in Al5083 by Neutron Diffraction", JOM, vol. 56(11), p.279, 2004.

  5. T.A. Saleh, H. Choo, D.W. Brown, B. Clausen, P.K. Liaw, S.C. Vogel, D.L. Klarstrom and R.A. Buchanan, "Internal Strain and Texture Development During Cyclic Loading of Haynes 230 Nickel Based Superalloy", JOM, vol. 56(11), p.205, 2004.

  6. A. D. Stoica, X.-L. Wang, J.W. Richardson, D.W. Brown, B. Clausen, H. Tian, M.L. Benson and P.K. Liaw, "Tension/Compression Asymmetry During Fatigue", JOM, vol. 56(11), p.205, 2004.

  7. C. Larsson, B. Clausen, T.M. Holden and M.A.M. Bourke, "Measurements and Predictions of Strain Pole Figures for Uniaxially Compressed Stainless Steel", JOM, vol. 56(11), p.96, 2004.

  8. M.A.M. Bourke, D.W. Brown, H. Choo, B. Clausen, V. Livescu, T.A. Sisneros and R. Vaidyanathan, "Compression Loading and Neutron Diffraction at Cryogenic Temperatures", JOM, vol. 56(11), p.41, 2004.

  9. G. Vaschenko, D. Patel, C.S. Menoni, S. Keller, U. Mishra, S.P. DenBaars, C.N. Tomé, B. Clausen, "Tuning Piezoelectric Fields in InGaN/GaN Quantum Wells. Summaries of papers presented at the Conference on Lasers and Electro-Optics. Postconference Technical Digest, Baltimore, MD, USA, pp.239-240 2001.

Awards
  1. 2005 Defense Programs Award of Excellence, "For In-Situ Measurements of Crystalline Lattice Strains in Polytetraflouroethylene".

  2. 2003 Defense Programs Award of Excellence, "For Unique Charracterization of Uranium Alloy Properties Using Neutron Diffraction".

  3. 2000 MST Division Review Poster Session, First Place, "A Study of a Reduction Reaction and its Potential for Tempering a Ceramic".


 
 

References


Dr. Mark A. M. Bourke
Los Alamos National Laboratory
Materials Science & Technology 8
P.O. Box 1663, MS G755
Los Alamos, NM 87545
Phone: +1 (505) 665-4735
Fax: +1 (505) 667-8021
E-mail: bourke@lanl.gov
 Dr. Donald W. Brown
Los ALamos National Laboratory
Materials Science & Technology 8
P.O. Box 1663, MS H805
Los Alamos, NM 87545
Phone: +1 (505) 667-7904
Fax: +1 (505) 665-2676
E-mail: dbrown@lanl.gov
 Prof. Ersan Üstündag
Iowa State University
Ames Lab. and Dept. of Mat. Sci. and Eng.
2220 Hoover Hall
Ames, IA 50011-2300
Phone: +1 (515) 294-9678
Fax: +1 (515) 294-7202
E-mail: ustundag@iastate.edu
Web: http://mse.iastate.edu/ustundag/


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