Effects of alloy 718 microstructure on hydrogen embrittlement susceptibility for oil and gas environments

被引：17
|
作者：
Kagay, B. [1 ]
Findley, K. [1 ]
Coryell, S. [2 ]
Nissan, A. B. [3 ]
机构：
[1] Colorado Sch Mines, 1500 Illinois St, Golden, CO 80401 USA
[2] Special Met Corp, 3200 Riverside Dr, Huntington, WV 25705 USA
[3] Chevron Energy Technol Co ETC, 100 Chevron Way, Richmond, CA 94802 USA
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2016年 / 32卷 / 07期
关键词：
Precipitation hardened nickel-base superalloys; Hydrogen embrittlement; Slow strain rate testing; Fractography; DELTA-PHASE; PRECIPITATION; SENSITIVITY;
D O I：
10.1080/02670836.2016.1139225
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of alloy 718 microstructure on hydrogen embrittlement susceptibility and tensile fracture mode were assessed through slow strain rate tensile testing and fracture surface analysis. Alloy 718 was annealed and aged to produce microstructures with variations in grain size and amount of grain boundary precipitates. Furthermore, the different ageing conditions likely resulted in differences in volume fractions and sizes of gamma' and gamma '' precipitates. The extent of grain boundary precipitation had the strongest effect on hydrogen embrittlement susceptibility, while grain size did not have any significant effect. Hydrogen embrittlement susceptibility was also correlated with differences in strength level, which was primarily controlled by the gamma' and gamma '' precipitate populations.
引用
收藏
页码：697 / 707
页数：11
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