Wire electric discharge machining induced titanium hydride in Ti-46Al-2Cr alloy

被引：8
|
作者：
Qin, GW
Oikawa, K
Smith, GDW
Hao, SM
机构：
[1] AIST, Natl Inst, Tohoku Ctr, Miyagino Ku, Sendai, Miyagi 9838551, Japan
[2] Univ Oxford, Dept Mat, Oxford OX1 3PH, England
[3] Northeastern Univ, Sch Met & Mat, Shenyang 110004, Peoples R China
来源：
INTERMETALLICS | 2003年 / 11卷 / 09期
关键词：
titanium aluminides; based on TiAl; electric discharge machining; X-ray diffraction;
D O I：
10.1016/S0966-9795(03)00102-X
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Wire electric discharge machining (Wire-EDM) induced a new phase in Ti-46Al-2Cr (in at.%) intermetallic alloy has been identified by using X-ray diffraction technique. The new Phase is found to be neither TiO2, nor A1(2)O(3) but well consistent with fee structure titanium hydride with the lattice parameter of 4.49-4.50 (A) over circle. The new phase exists in the wire-EDM cut alloy surface layer limiting to about 70 mum thick, much deeper than the wire-EDM induced recast layer thickness of 2-3 mum. One processing, vacuum annealing at 400-600degreesC, has been proposed to remove this hydride induced by wire-EDM. In addition, The wire-EDM induced microcracks extensively happen on the EDM-cut surface and penetrate into matrix up to 10-30 mum. (C) 2003 Elsevier Ltd. All rights reserved.
引用
收藏
页码：907 / 910
页数：4
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