Effect of aluminium on hydrogen-induced fracture behaviour in austenitic Fe-Mn-C steel

被引:79
作者
Ryu, Joo Hyun [1 ]
Kim, Sung Kyu [2 ]
Lee, Chong Soo [1 ]
Suh, Dong-Woo [1 ]
Bhadeshia, H. K. D. H. [1 ,3 ]
机构
[1] Pohang Univ Sci & Technol POSTECH, Grad Inst Ferrous Technol GIFT, Pohang 790784, South Korea
[2] POSCO, Tech Res Lab, Kwangyang, South Korea
[3] Univ Cambridge, Cambridge CB2 3QZ, England
来源
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES | 2013年 / 469卷 / 2149期
基金
新加坡国家研究基金会;
关键词
aluminium; hydrogen; fracture; austenitic Fe-Mn-C steel; STACKING-FAULT ENERGY; DELAYED FRACTURE; MARTENSITE-TRANSFORMATION; AL; MICROSTRUCTURE; EMBRITTLEMENT; DIFFRACTION; CRACKING;
D O I
10.1098/rspa.2012.0458
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
It is known empirically that the addition of aluminium as a solute in high-Mn austenitic steels dramatically improves their resistance to hydrogen-induced embrittlement. A variety of experimental techniques, including the characterization of trapping sites and high-resolution observation of fracture facets, have been used to reveal the mechanism by which aluminium induces this effect. It is found that transgranular fracture is promoted by the segregation of hydrogen to mechanical twin interfaces and to any epsilon-martensite that is induced during deformation. Because aluminium increases the stacking fault energy of austenite, the tendency for mechanical twinning is reduced, and the formation of deformation-induced martensite eliminated. These two effects contribute to the resistance of the aluminium-alloyed steel to hydrogen embrittlement.
引用
收藏
页数:14
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