In situ TEM study of dislocation slip in a metastable β titanium alloy

SCRIPTA MATERIALIA

卷:66

Article

Castany, P.¹  Besse, M.¹  Gloriant, T.¹ 

[1] INSA Rennes, CNRS, UMR Sci Chim Rennes Chim Met 6226, F-35708 Rennes 7, France

关键词: Titanium alloys;    Transmission electron microscopy;    Dislocations;    In situ straining;    Slip;   

DOI  :  10.1016/j.scriptamat.2011.11.036

来源: Elsevier

【 摘 要 】

Dislocation slip is investigated in a metastable 13 titanium alloy with the Ti-23Nb-0.7Ta-2Zr-0.4Si composition (at.%) by in situ straining experiments in a transmission electron microscope. Moving dislocations have a/2 (111) Burgers vectors and glide in {110), {121 or {123} planes. The mobility of screw dislocations is lowered by punctual defects and the existence of a stable and sessile core configuration that has to recombine in order to allow dislocations to glide. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free