The tensile properties of NiCrMo1 steel under conditions of hydrogen charging studied using the linearly increasing stress test
The tensile properties of NiCrMo1 steel were investigated using the linearly increasing stress test (LIST) in air and with hydrogen charging.Hydrogen charging was carried out by applying an increasingly negative applied potential to-1550 mVAg/AgCl in acidified 0.1 M Na2SO4,pH 2 solution.The LIST results showed that the yield stress of the steel was similar in air or with hydrogen charging.SEM examination showed that the specimens tested in air had no surface cracks,and the fracture surfaces comprised dimples.The failure in air was due to ductile overload.The specimens tested with hydrogen charging had obvious surface cracks in the necked region,and their length increased to about 550 μm with a more negative potential.However,the fracture surfaces were nevertheless dominated by ductile feature.These results imply that the influence of hydrogen was only associated with the final ductile fracture after the onset of necking.
Steel 1 LIST 2 hydrogen embrittlement 3 SEM 4
Qian Liu Bartolomeus Irwanto Andrej Atrens
The University of Queensland,Materials Engineering,St Lucia,Qld 4072,Australia Alstom(Switzerland)Ltd,CH-5242 Birr,Switzerland
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）