Mechanical behaviour of Zr doped Ni3Al alloy:: effects of heat treatment, environment, and temperature

被引：0
作者：
Li, YF [1 ]
Guo, JT [1 ]
Ye, HQ [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2005年 / 21卷 / 07期
关键词：
Ni3Al(Zr) alloy; mechanical properties; environmental embrittlement; recrystallisation treatment;
D O I：
10.1179/174328405X46051
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The mechanical behaviour of polycrystalline Ni76Al23Zr alloy was studied as a function of heat treatment, environment, and temperature. It was found that the tensile ductility was very sensitive to temperature, the alloy showing low ductility at temperatures' from 700 to 1000 degrees C both in air and vacuum. Environmental embrittlement could be alleviated for those specimens with elongated grains. The ductile transgranular fracture was explained by stress concentration at the intersection of slip bands and grain boundaries. It was also found that an oxide layer, formed during tensile testing at elevated temperature, affected the environmental embrittlement of Ni3Al(Zr) alloy. An adherent Al rich oxide film was effective in protecting the underlying alloy from oxygen penetration.
引用
收藏
页码：824 / 830
页数：7
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