A low cycle fatigue model for low carbon manganese steel including the effect of dynamic strain aging

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• 作者：Zhi Yong Huang^a ; ^{huangzy@scu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Daniè ; le Wagner^b ; Qing Yuan Wang^a ; Muhammad Kashif Khan^a ; Jean&ndash ; Louis Chaboche^c
• 关键词：Carbon manganese steel ; Cyclic hardening ; Dynamic strain aging ; Low cycle fatigue
• 刊名：Materials Science & Engineering A
• 出版年：2016
• 出版时间：27 January 2016
• 年：2016
• 卷：654
• 期：Complete
• 页码：77-84
• 全文大小：1844 K

文摘

Carbon–manganese steel A48 (French standards) is used in steam generator pipes of the nuclear power plant where it is subjected to the cyclic thermal load. The Dynamic Strain Aging (DSA) influences the mechanical behavior of the steel in low cycle fatigue (LCF) at favorable temperature and strain rate. The peak stress of A48 steel experiences hardening–softening–hardening (HSH) evolution at 200 °C and 0.4% s⁻¹ strain rate in fatigue loading. In this study, isotropic and kinematic hardening rules with DSA effect have been modified. The HSH evolution of cyclic stress associated with cumulative plastic deformation has also been estimated.