氢对304L奥氏体不锈钢力学性能的影响
Effect of Hydrogen on Mechanical Properties of 304L Austenitic Stainless Steel
摘 要
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.
电解充氢
氢脆
力学性能
stainless steel
electrochemical hydrogen charging
hydrogen embrittlement
mechanical property
Abstract
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 14 mg·kg-1 in 304L stainless steel after 96 h hydrogen charging with the current density of 20 mA·cm-2.Hydrogen in the steel induced decline of strength ,plasticity and toughness in some degree.The fractography showed the tensile specimen fractue surface changed form ductile fracture before hydrogen-charging to embrittlement fracture after hydrogen-changing.
中图分类号 TG174.3
所属栏目 试验研究
基金项目 江苏省“六大人才高峰”项目(06-D-035)
收稿日期 2008/10/20
修改稿日期 2009/4/30
网络出版日期
作者单位点击查看
备注姜勇(1974-),男,山东乳山人,讲师,硕士.
引用该论文: JIANG Yong,GONG Jian-ming,ZHOU Rong-rong,DAI Yue. Effect of Hydrogen on Mechanical Properties of 304L Austenitic Stainless Steel[J]. Materials for mechancial engineering, 2009, 33(11): 15～18
姜勇,巩建鸣,周荣荣,戴越. 氢对304L奥氏体不锈钢力学性能的影响[J]. 机械工程材料, 2009, 33(11): 15～18
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参考文献
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【2】ELIEZER D,CHAKRAPANI D G,ALISTETTER C J,et al.The influence of austenite stability on the hydrogen embrittlement and stress-corrosion cracking of stainless steel[J].Metallurgical Transactions A,1979,10(7):935-941.
【3】ZHOU Rong-rong,GONG Jian-ming,LI Feng,et al.Evaluation of stress corrosion cracking of type 304L stainless steel in low concentration sodium hydroxide solution with high temperature[J].Key Engineering Materials,2007,353/358(2):3031-3034.
【4】BRASS A M,CHNE J.Hydrogen uptake in 316L stainless steel: Consequences on the tensile properties[J].Corrosion Science,2006,48(10):3222-3242.
【5】ELKEBIR O A,SZUMMER A.Comparison of hydrogen embrittlement of stainless steels and nickel-base alloys[J].International Journal of Hydrogen Energy,2002,27:793-800.
【6】徐颖,姚寿山,林栋梁,等.用于堆焊层氢致剥离研究的一种有效方法[J].上海交通大学学报,1994,28(4):95-100.
【7】李秀艳,李依依.奥氏体合金的氢损伤[M].北京:科学出版社,2003.
【8】CRANK J.The Mathematics of Diffusion[M].Oxford: Clarendon Press,1975.
【9】TROIANO A R.Hydrogen degradation of ferrous alloys[J].ASM,1960,52(6):54-58.
【10】ORIANI R A,JOSEPHIC P H.Equilibrium aspects of hydrogen-induce cracking of steels[J].Acta Met,1974,22 (3):1065-1071.
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