Evaluation of creep properties using small punch creep test for modified 9Cr-1Mo steel

被引：0
作者：
Sangyeop Kim
Uijeong Ro
Yong Hwi Kim
Taeksang Lee
Moon Ki Kim
机构：
[1] Sungkyunkwan University,School of Mechanical Engineering
[2] Myongji University,Department of Mechanical Engineering
[3] Sungkyunkwan University,SKKU Advanced Institute of Nano Technology (SAINT)
来源：
Journal of Mechanical Science and Technology | 2022年 / 36卷
关键词：
Creep; Next-generation nuclear plants; Modified 9Cr-1Mo steel; Small punch test;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In the pressure vessel of a very-high-temperature reactor (VHTR), creep damage, which has a fatal adverse effect on safe operation, occurs due to long-term operation at a higher temperature. In this paper, only the small punch creep test (SPCT) was used to evaluate the creep properties of modified 9Cr-1Mo steel, which is considered a suitable candidate material for VHTR pressure vessels. Since the test outputs of SPCT are displacement and load, we converted those outputs into the strain and stress of conventional uniaxial creep tests (UCTs). The Norton, Larson-Miller and Monkman-Grant creep models were constructed using the conversion data from SPCT and the triangular relationship among the three creep models was successfully demonstrated. Finally, those three models were constructed using long-term UCT with the same material and temperature, and the validity of this study was verified by comparing it with SPCT results.
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页码：4549 / 4561
页数：12
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