Hydrogen embrittlement of a Ti-Al-Zr alloy evaluated by impact test method

被引：17
作者：
Liu, YZ
Zu, XT
Li, C
Qiu, SY
Li, WJ
Huang, XQ
机构：
[1] Natl Key Lab Nucl Fuel & Mat, Chengdu 610041, Peoples R China
[2] Univ Elect Sci & Technol China, Dept Appl Phys, Chengdu 610054, Peoples R China
来源：
SCRIPTA MATERIALIA | 2005年 / 52卷 / 09期
关键词：
Ti-Al-Zr alloy; hydriding; hydrogen embrittlement; SEM;
D O I：
10.1016/j.scriptamat.2005.01.017
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The characteristics of hydriding and hydrogen embrittlement of a Ti-Al-Zr alloy were evaluated by the impact test method. The results indicated that the hydrides in Ti-Al-Zr alloy formed as platelets and were identified as face-centered cubic delta-hydride. At room temperature, the specimen showed great sensitivity to embrittlement in ductility by hydrogen. The hydrides formed promoted the crack propagation in the presence of stress, leading to the cleavage failure mode. The impact toughness decreased dramatically with increasing hydrogen concentrations, indicated that the critical hydrogen concentration required to embrittle the alloy might be lower than 300 ppm. (C) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：821 / 825
页数：5
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