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何建宏 , 唐祥云 , 陈南平
金属学报
用紧凑拉伸实验研究了铁素体-奥氏体双相不锈钢的氢致延迟开裂过程,发现氢致开裂应力强度因子门槛值K_H随γ量增加而增加,随充氢电流密度增加而下降。氢致裂纹在α相内{100}面形核,扩展连通,最后将γ相和晶界撕裂,γ相阻碍氢致延迟裂纹的扩展,在断裂方面起到“纤维韧化”的作用。
关键词: 双相不锈钢 , hydrogen embrittlement , compact tension
刘子海 , 严长浩 , 宋佳 , 胡丽敏 , 王春宏 , 王志峰 , 张明
功能材料 doi:10.3969/j.issn.1001-9731.2015.08.012
利用紧凑拉伸实验方法，测定含钆有机玻璃的平面应变断裂韧性 K IC ，并对紧凑拉伸试样的断面形貌进行分析。利用环境扫描电子显微镜原位拉伸测试技术，分析含钆有机玻璃在拉伸应力下的断裂过程，认为用裂尖银纹-裂纹模型和次级破裂模型分别解释含钆有机玻璃的慢速裂纹扩展和快速裂纹扩展过程是合适的。
关键词: 含钆有机玻璃 , 紧凑拉伸 , 断裂韧性 , 断裂机理
HE Jianhong TANG Xiangyun CHEN Nanping Tsinghua University , Beijing , China Professor , Division of Metallic Materials , Dept.of Materials Science and Engineering , Tsinghua University , Beijing , China
金属学报(英文版)
Hydrogen induced cracking in a ferritic-austenitic duplex stainless steel has been investigated using compact tension tests.The stress intensity threshold K_H of the steel rises with increasing austenite content and decreases with increasing current density during hydrogen charging.The hydrogen induced cracking initiates and propagates on {100} planes of the ferrite grains.The austenite grains play a “fibre-toughened” role during obstructing crack propagation.
关键词: duplex stainless steel , null , null
