EFFECT OF HYDROGEN ON THE MECHANICAL-PROPERTIES OF HIGH-PURITY IRON .3. DEPENDENCE OF SOFTENING ON SPECIMEN SIZE AND CHARGING CURRENT-DENSITY

被引:115
作者
MATSUI, H [1 ]
KIMURA, H [1 ]
KIMURA, A [1 ]
机构
[1] TOHOKU UNIV,GRAD SCH ENGN,SENDAI,MIYAGI 980,JAPAN
来源
MATERIALS SCIENCE AND ENGINEERING | 1979年 / 40卷 / 02期
关键词
D O I
10.1016/0025-5416(79)90193-9
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The effect of hydrogen charging on the flow stress of high purity iron was investigated for wide ranges of specimen size, charging current density and strain rate. The amount of softening was analyzed in terms of these variables and is assumed to be proportional to the average hydrogen concentration in the matrix, which is determined by the balance between hydrogen supply from the surface and hydrogen trapping by newly produced dislocations. The results are well explained. Hardening was observed at low temperatures and under a large charging current. The strain rate sensitivity of the flows stress in hydrogen-charged specimens was measured. The results are also explained in terms of hydrogen-dislocation interactions. © 1979.
引用
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页码:227 / 234
页数:8
相关论文
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