吴奕初
,
常香荣
,
田中卓
,
肖纪美
金属学报
本文采用正电子湮没技术研究了高纯Fe中的氢损伤规律,实验结果表明,在0.5mol/L H_2SO_4溶液中不加毒化剂电解充氢时,产生氢损伤的临界电流密度为20 mA/cm~2;而在0.5mol/L H_2SO_4溶液中加少量As_2O_3作为毒化剂电解充氢时,即使很小的电流密度也会产生氢损伤,配合慢拉伸试验,还发现试样内部产生氢损伤以后,它将控制随后的形变和断裂过程
关键词:
氢损伤
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critical current density
,
positron annihilation technique
,
hydrogen-induced defect
WU Yichu CHANG Xiangrong TIAN Zhongzhuo XIAO Jimei University of Science and Technology Beijing
,
Beijing
,
China
金属学报(英文版)
Hydrogen damage in iron or 99.99% purity has been investigated by Doppler broadening measurement.Experimental results show that when the iron is charged with hydrogen in 0.5mol/L H_2SO_4 solution,the critical current density to cause hydrogen damage is 20mA/cm~2.While a little As_2O_3,saying 250mg/L,added to H_2SO_4 solution,even rather small current density.≤0.2mA/cm~2,would cause hydrogen damage.With the help ofi slow tensile test,it revealed that the hydrogen damage occurred in the specimen may be influential to the subsequent process of deformation and fracture.
关键词:
hydrogen damage
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