氢致开裂的TEM原位拉伸观察与研究  

TEM in-situ Observation of Hydrogen-induced Cracking

作　　者：陈奇志[1] 李成华[1] 褚武扬[1] 王燕斌[1] 肖纪美[1] 

机构地区：[1]北京科技大学材料物理系

出　　处：《北京科技大学学报》1996年第2期168-173,共6页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金

摘　　要：通过对预充氢３１０不锈钢薄膜在透射电镜（ＴＥＭ）下的原位拉伸观察，并和不含氢试样的结果相比较，研究了氢在韧─脆转变中的作用及氢致脆断机理，结果表明，氢使奥氏体不锈钢由韧变脆的根本原因是氢降低了微裂纹形核时的临界应力强度因子，从而抑制了ＤＦＺ中纳米级微裂纹向空洞的转化。The effect of hydrogen on the cracking of type 310 stainless steel was studied by TEM in situ observation of hydrogen-charged specimens and comparison with the hydrogen-free specimens.The results show that the effect of hydrogen on the change from ductile to brittle is to prevent nano cracks in DFZs from blunting into voids.

关 键 词：氢致脆断 微裂纹 原位观察 不锈钢 TEM 

分 类 号：TG142.71[一般工业技术—材料科学与工程] TG115.57[金属学及工艺—金属材料]