摘要
通过电解充氢后除气,即可在304奥氏体不锈钢中引入不同数量的氢致马氏体（ε+α’,其中ε占 2/3）;同时并未明显改变试样的强度和位错密度.氢致马氏体使304不锈钢脆化,塑性损失随马氏体含量升高而升高.在沸腾MgCl2溶液中慢应变速率拉伸实验表明,随氢致马氏体含量升高,应力腐蚀敏感性也升高;但当马氏体总量超过10％之后,应力腐蚀敏感性逐渐趋于一个稳定值.
Hydrogen-induced martensite in type 304 stainless steel were formed through cathodic charging and then outgassing at 250 degreesC. Susceptibility to stress corrosion cracking (SCC) for the specimens with various hydrogen-induced martensite was measured by slow strain rate tests in a MgCl2 solution and in silicon oil at 143 degreesC, respectively. The result shows the susceptibility to SCC increased with increasing the amount of hydrogen-induced martensite, but approached gradually a saturation value after the martensite exceeded 10 volume fraction in percent.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第10期1079-1081,共3页
Acta Metallurgica Sinica
基金
国家重点基础研究发展规划 G19990650
国家自然科学基金50071010资助项目
关键词
304不锈钢
氢致马氏体
MgCl2应力腐蚀
304 stainless steel
hydrogen-induced martensite
stress corrosion cracking (SCC)
