Low Cycle Fatigue Behavior of 429EM Ferritic Stainless Steel at Elevated Temperatures

K. O. Lee; Samson Yoon; S. B. Lee; B. S. Kim

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Low Cycle Fatigue Behavior of 429EM Ferritic Stainless Steel at Elevated Temperatures

机译：429EM铁素体不锈钢在高温下的低周疲劳行为

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In recent, ferritic stainless steels are widely used in high temperature structure because of their high resistance in thermal fatigue and low prices. Tensile and low cycle fatigue(LCF) tests on 429EM stainless steel were performed at several temperatures from room temperature to 600℃. Elastic modulus, yield stress and ultimate tensile strength(UTS) decreased with increasing temperature. Considerable cyclic hardening occurred at 200℃ and 400℃. 475℃ embrittlement observed could not explain this phenomenon but dynamic strain aging(DSA) observed from 200℃ to 500℃ could explain the hardening mechanism at 200℃ and 400℃. And it was observed that plastic strain energy density(PSED) was useful to predict fatigue life when large cyclic hardening occurred. Fatigue life using PSED over elastic modulus could be well predicted within 2X scatter band at various temperatures.

机译：近年来，由于铁素体不锈钢具有高的抗热疲劳性和低廉的价格，因此被广泛用于高温结构。在从室温到600℃的几个温度下对429EM不锈钢进行了拉伸和低周疲劳（LCF）测试。弹性模量，屈服应力和极限抗拉强度（UTS）随温度升高而降低。在200℃和400℃时发生相当大的循环硬化。观察到的475℃脆化不能解释这种现象，但是在200℃至500℃观察到的动态应变时效（DSA）可以解释200℃和400℃时的硬化机理。并且观察到塑性应变能密度（PSED）可用于预测大循环硬化发生时的疲劳寿命。使用PSED超过弹性模量的疲劳寿命可以在不同温度下2X散射带内得到很好的预测。

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《Key Engineering Materials》 |2004年第2期|p.1135-1140|共6页
作者
K. O. Lee; Samson Yoon; S. B. Lee; B. S. Kim;
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作者单位

Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 373-1, Guseong-dong, Yuseong-gu, Dae jeon, 305-701, Korea;

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正文语种 eng
中图分类工程基础科学;
关键词
low cycle fatigue; 429EM stainless steel; ferritic stainless steel; dynamic stain aging; 475℃ embrittlement; morrow model;

机译：低周疲劳;429EM不锈钢;铁素体不锈钢;动态污点时效;475℃脆化;明天模型;

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4. Low Cycle Fatigue Behavior of 429EM Ferritic Stainless Steel at Elevated Temperatures [C] . K. O. Lee, Samson Yoon, S. B. Lee, International Conference on Fracture and Strength of Solids . 2004

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5. ON THE EFFECTS OF STATIC AND CYCLIC LOADS ON FERRITIC STEELS AT ELEVATED TEMPERATURES (CREEP-FATIGUE INTERACTION). [D] . BUNCH, JEFFREY OMER. 1986

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Low Cycle Fatigue Behavior of 429EM Ferritic Stainless Steel at Elevated Temperatures

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