Investigation on Hydrogen Embrittlement Mechanism of Metastable Austenitic Stainless Steel Using Micro-Mechanical Testing

亚稳奥氏体不锈钢氢脆机理的微观力学测试研究

• 批准号: 23760671
• 负责人: MINE Yoji
• 金额: $ 3万
• 依托单位: Kumamoto University (2012)Kyushu University (2011)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23760671/
• 关键词: 水素脆化; 加工誘起マルテンサイト変態; オーステナイト系ステンレス鋼; マイクロ引張試験; 構造・機能材料; 機械材料・材料力学; 格子欠陥; 水素

Micro-tension testing combined with metallographic characterization was used to investigate the effect of martensite on the hydrogen embrittlement mechanism. The underlying microstructure deformed in the presence of hydrogen strongly influences the formation of α’ martensite, leading to premature plastic instability. In both the austenite-phase specimen and the martensite-phase specimen, the microstructure obtained by plastic deformation with hydrogen exhibited low yield stress and poor ability of strain hardening when compared to the counterpart formed in the absence of hydrogen. These findings suggest that defects induced by deformation with hydrogen have a big impact on hydrogen degradation of metastable austenitic steel.

采用微拉伸试验和金相分析相结合的方法研究了马氏体对氢脆机理的影响。在氢存在下变形的底层显微组织强烈影响α'马氏体的形成，导致过早的塑性不稳定。在这两个贝氏体相试样和马氏体相试样中，通过与氢的塑性变形所获得的显微组织表现出较低的屈服应力和应变硬化能力差时相比，在没有氢的情况下形成的对应物。这些结果表明，氢变形引起的缺陷对亚稳奥氏体钢的氢降解有很大的影响。

项目成果

オーステナイト系ステンレス鋼の水素脆化と結晶粒微細化の影響

氢脆和晶粒细化对奥氏体不锈钢的影响

• 发表时间: 2012
• 作者: T. Nakano;T. Ishimoto;N. Ikeo;A. Matsugaki;青木 俊憲，井手 拓哉，中嶋 英雄，谷口 浩平，佐々 木眞敏;峯 洋二
• 通讯作者: 峯 洋二

熊本大学工学部マテリアル工学科先端材料学研究室

熊本大学工学院材料工学系先进材料实验室

Grain-boundary diffusion and precipitate trapping of hydrogen in ultrafine-grained austenitic stainless steels processed by high-pressure torsion

• DOI: 10.1016/j.msea.2011.07.031
• 发表时间: 2011-10-25
• 期刊: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
• 影响因子: 6.4
• 作者: Mine, Yoji;Tachibana, Kazutaka;Horita, Zenji
• 通讯作者: Horita, Zenji

Micro-tension behavior of lath martensite in steel

钢中板条马氏体的微观拉伸行为

• 发表时间: 2012
• 作者: H. Takashima;K. Hirashita;M. Matsuda;Y. Mine;K. Takashima
• 通讯作者: K. Takashima

Strengthening and hydrogen susceptibility of ultrafine-grained steels processed by high-pressure torsion

高压扭转加工超细晶粒钢的强化和氢敏感性

• 发表时间: 2012
• 作者: Y. Mine;Z. Horita
• 通讯作者: Z. Horita