Straining-temperature dependence of vacancy behavior in hydrogen-charged austenitic stainless steel 316L
Straining-temperature dependence of vacancy behavior in hydrogen-charged austenitic stainless steel 316L
复制标题
充氢奥氏体不锈钢 316L 中空位行为的应变-温度依赖性
DOI:
10.1016/j.ijhydene.2020.11.148
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发表时间:
2021
影响因子:
7.2
通讯作者:
Chiari Luca
中科院分区:
文献类型:
--
作者:
Komatsu Akari;Fujinami Masanori;Hatano Masaharu;Matsumoto Kazuhisa;Sugeoi Mitsuki;Chiari Luca
The vacancy behavior in austenitic stainless steel 316L with highγ-phase stability in a hydrogen environment was investigated to clarify the critical defects of hydrogen embrittlement. Hydrogen was introduced in the samples by the high-pressure gas method and tensile straining was conducted at variable low temperatures. Characterization of the strain distribution and vacancy defects was performed by SEM-KAM and low-temperature positron annihilation lifetime spectroscopy measurements, respectively. Upon straining at low temperatures (<-70 °C), high-strain regions were induced locally where a high concentration of vacancies accumulated. These vacancies agglomerated into large clusters that are thought to develop into the embryos of larger voids leading to cracks. These results show that the local formation of hydrogen-induced vacancies in high-strain regions is the determining factor of hydrogen embrittlement in austenitic stainless steel 316L.
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10.3323/jcorr.55.537
发表时间:
2006
期刊:
Zairyo-to-kankyo
影响因子:
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1999
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