氢致开裂的TEM原位拉伸观察与研究

TEM in-situ Observation of Hydrogen-induced Cracking

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。

Abstract: 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.