| Bibliographic Citation | |
| Full Text |  977 K |
|---|---|
| Title | Micromechanisms of Twin Nucleation in TiAl: Effects of Neutron Irradiation |
| Creator/Author | Hishinuma, A. ; Yoo, M.H. |
| Publication Date | 1999 Jan 28 |
| OSTI Identifier | OSTI ID: 1737; Legacy ID: DE00001737 |
| Report Number(s) | ORNL/CP-100170 |
| DOE Contract Number | AC05-96OR22464 |
| Other Number(s) | Other: KC 02 01 05 0; ON: DE00001737 |
| Resource Type | Conference |
| Resource Relation | Conference: TMS Annual Meeting, San Diego, CA (USA), February 28-March 4, 1999 |
| Research Org | Oak Ridge National Laboratory; Oak Ridge, TN |
| Sponsoring Org | USDOE Office of Energy Research (ER) |
| Subject | 36 MATERIALS SCIENCE; Nucleation; Nucleation; Irradiation; Irradiation; Titanium Alloys; Titanium Alloys; Aluminium Alloys; Aluminium Alloys; Ductility; Ductility; Twinning; Twinning; Deformation; Deformation |
| Description/Abstract | The so-called radiation-induced ductility (RID) reported in neutron-irradiated 47at%Al alloys is attributed to the formation of effective twin embryos in the presence of interstitial-type Frank loops in {gamma}-TiAl and the subsequent nucleation and growth of microtwins during post-irradiation tensile deformation. The stability of large faulted Frank loops is explained in terms of the repulsive interaction between Shockley and Frank partials. Interaction of only six ordinary slip dislocations with a Frank loop can facilitate a pole mechanism for twin formation to work. The relative ease of heterogeneous twin nucleation is the reason for the RID and the lack of changes in yield strength and work hardening. |
| Country of Publication | United States |
| Language | English |
| Format | Medium: P; Size: 14 Pages |
| Availability | To purchase this media from NTIS, click here |
| System Entry Date | 2008 Feb 04 |
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Last Updated: 03/16/2009