氢对22-13-5不锈钢室温下力学行为的影响

龙起易; 范存淦; 邢中枢; 李依依

doi:10.11858/gywlxb.1994.02.005

氢对22-13-5不锈钢室温下力学行为的影响

doi: 10.11858/gywlxb.1994.02.005

1.
中国科学院国际材料物理中心，辽宁沈阳 110015；
2.
中国科学院金属研究所，辽宁沈阳 110015

详细信息

通讯作者:
龙起易

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出版历程
- 收稿日期: 1993-07-26
- 修回日期: 1993-09-13
- 发布日期: 1994-06-05

Effect of Hydrogen on the Mechanical Behaviour of 22-13-5 Stainless Steel at Room Temperature

1.
International Centre for Materials Physics, Academia Sinica, Shenyang 110015, China;
2.
Institute of Metal Besearch, Academia Sinica, Shenyang 110015, China

More Information

Corresponding author: LONG Qi-Yi

摘要

摘要: 22-13-5钢是一种高强度极稳定的奥氏体不锈钢，将它置于10 MPa（100个大气压）纯氢气中在300 ℃充氢14天，含氢量为651 ppm。室温下力学性能测试表明：充氢后钢的强度提高，塑性指标不变；但室温下瞬态蠕变和短期应力弛豫行为，在可比条件下，变得更为强烈。用Alden的可动位错密度理论，对实验结果作了定性分析，并对瞬态蠕变结果进行了定量的计算。结果证明，氢原子阻碍位错运动，使材料强度增加，同时也使材料的粘滞性增大。
- 氢 /
- 瞬态蠕变 /
- 可动位错密度 /
- 硬化和软化
Abstract: A stable fcc 22-13-5 stainless steel was hydrogen charged by exposing it in 9.8 MPa hydrogen gas at 300 ℃ for 14 days. The concentration of hydrogen was determined tobe 651 ppm. The mechanical testing at room temperature shows that after hydrogen charging the yield strength of the steel increases and the behaviour of transient creep and stress relaxation become more intensive in comparable conditions. All the results can be interpreted qualitatively and part of the creep results can be quantitatively calculated by the theory of mobile dislocation density proposed by Alden. The analysis indicates that the essential effects of hydrogen are to obstruct the movement of dislocation, so that the strength and the inelastic visccaity of the steel increase.
- hydrogen /
- transient creep /
- mobile dislocation density /
- hardening and softening