Hydrogen Environment Embrittlement of SCM440 Steel in High-pressure Hydrogen at Room Temperature
Hydrogen Environment Embrittlement of SCM440 Steel in High-pressure Hydrogen at Room Temperature
复制标题
SCM440钢在室温高压氢气中的氢环境脆化
DOI：
10.2320/jinstmet.69.190
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发表时间：
2005
影响因子：
--
通讯作者：
K. Yokogawa
中科院分区：
文献类型：
--
作者：
M. Imade;S. Fukuyama;Lin Zhang;M. Wen;K. Yokogawa
采用自行设计的材料试验装置，在70 MPa高压氢环境下，研究了热处理后SCM 440钢在应变速率为4.2×10-5 ~ 4.2×10- 2s-1范围内的室温氢环境脆化行为。氢对SCM 440钢的拉伸性能有显著影响。SCM 440钢的HEE随氢压的增加而增加，随应变速率的降低而增加。HEE从退火到正火再到淬火钢逐渐增加。淬火-回火SCM 440钢的热弹性系数随回火温度的升高而降低。结果表明，退火态和正火态的氢致准解理断裂，淬火态的氢致准解理断裂和沿晶断裂的混合断裂。
Hydrogen environment embrittlement (HEE) of the heat-treated SCM440 steels was investigated at room temperature with the strain rate range from 4.2×10-5 to 4.2×10-2 s-1 by using specially designed testing equipment for materials under high-pressure hydrogen of 70 MPa. Hydrogen showed marked effect on the tensile properties of SCM440 steel. The HEE of SCM440 steel increased with increasing hydrogen pressure and increased with decreasing strain rate. HEE increased from the annealed to the normalized and then to the quenched steel. HEE of the quenched-tempered SCM440 steel decreased with increasing the tempering temperture. It was observed that hydrogen causes quasi-cleavage fracture for annealed and normalized steel, and the mixture of the quasi-cleavage fracture and intergranular fracture for the quenched steel.