氫致開裂的TEM原位拉伸觀察與研究

TEM in-situ Observation of Hydrogen-induced Cracking

摘要: 通過對預充氫310不銹鋼薄膜在透射電鏡(TEM)下的原位拉伸觀察,并和不含氫試樣的結果相比較,研究了氫在韌-脆轉變中的作用及氫致脆斷機理,結果表明,氫使奧氏體不銹鋼由韌變脆的根本原因是氫降低了微裂紋形核時的臨界應力強度因子,從而抑制了DFZ中納米級微裂紋向空洞的轉化。

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.