对304L奥氏体不锈钢试样进行了一系列的电解充氢试验,并对充氢试样进行了拉伸和冲击试验.结果表明:在20 mA·cm-2的电流密度下充氢96 h后,304L不锈钢中的氢含量为14 mg·kg-1,材料强度、塑性和韧性均有一定程度的降低;充氢后拉伸试样断口表层由充氢前的韧性断裂转变为由氢导致的脆性断裂.
A series of electrochemical hydrogen charging tests were carried out for 304L austenitic stainless steel. Tensile tests and impact tests were employed for hydrogen-charging specimen. The results show that the hydrogen content was 14mg·kg-1 in 304L stainless steel after 96 h hydrogen charging with the current density of 20mA·cm-2.Hydrogen in the steel induced decline of strength,plasticity and toughness in some degree.The ractography showed the tensile specimen fractue surface changed form ductile fracture before hydrogen-charging to embrittlement fracture after hydrogen-changing.
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