合金元素对钢低温力学性能的影响

E. Anderson, R. Bode, J. E. Dorn, J. Spreadborough
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引用次数: 5

摘要

摘要分析了Fe-C、Fe-Nb-C、Fe-V-C、Fe-N、Fe-Nb-V-N和Fe-V-N稀释钢的低温拉伸性能。合金塑性行为的主要差异来自于它们的非热应力/应变行为。较低的屈服强度与温度的关系定性地对应于热激活变形的佩尔斯机制。激活体积也与仅基于Peierls机制的预期相吻合。结果表明,peerls应力、扭结能和peerls山丘的形状对合金成分和热处理不敏感。在298°K时,较高的屈服应力也会产生较高的Tc值,即塑性行为变为非热的温度,这一事实被解释为,随着应力的非热成分增加,流动位错密度乘以由一对扭结扫除的位错长度的乘积ρL减小。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effects of Alloying Elements on the Mechanical Properties of Steels at Low Temperatures
AbstractThe low-temperature tensile properties of dilute Fe–C, Fe–Nb–C, Fe–V–C, Fe–N, Fe–Nb–V–N, and Fe–V–N steels have been analysed. The major differences in the plastic behaviour of the alloys arise from their athermal stress/strain behaviour. The lower yield strength vs. temperature relations correspond qualitatively with the Peierls mechanism for thermally activated deformation. The activation volumes also agree well with expectations based only on the Peierls mechanism. The results suggest that the Peierls stress, kink energy, and shapes of the Peierls hills are insensitive to alloy composition and heat-treatment. The fact that higher yield stresses at 298° K also gave higher values of Tc , the temperature at which plastic behaviour becomes athermal, has been interpreted to mean that the product, ρL, of the density of mobile dislocations times the dislocation length swept out by a pair of kinks decreased as the athermal component of stress increased.
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