The effect of pre-deformation on environmental embrittlement of Ni-3(Si,Ti) alloys

被引：13
作者：
Ma, CL
Takasugi, T
Hanada, S
机构：
[1] Institute for Materials Research, Tohoku University, Sendai, 980-77, Katahira 2-1-1, Aoba-ku
来源：
SCRIPTA MATERIALIA | 1996年 / 34卷 / 10期
关键词：
D O I：
10.1016/1359-6462(96)00025-5
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of pre-deformation at liquid nitrogen temperature on embrittlement of Ni3(Si,Ti) alloys due to hydrogen released from air is investigated, comparing the results in the specimens which were re-deformed in air and in vacuum at room temperature. As the pre-deformation increases, tensile elongation of the Ni3(Si,Ti) specimen re-deformed in air increased. A total amount of tensile elongation (i. e. elongation by pre-deformation + elongation by re-deformation in air) reached a value of the specimen which was deformed simply in vacuum at room temperature. Correspondingly, fracture mode changed from intergranular to transgranular fracture. This result indicates that deformation microstructure introduced by the pre-deformation has the effect of reducing the embrittlement due to hydrogen decomposed from moisture in air, through scavenging hydrogen atoms to crystal defects such as dislocations or vacancies.
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收藏
页码：1633 / 1639
页数：7
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