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http://dx.doi.org/10.3795/KSME-A.2004.28.4.427

Low Cycle Fatigue Behavior of 429EM Stainless Steel at Elevated Temperature  

Lee, Keum-Oh (한국과학기술원 기계공학과)
Yoon, Sam-Son (한국과학기술원 기계공학과)
Hong, Seong-Gu (한국과학기술원 기계공학과)
Kim, Bong-Soo (현대자동차 Vehicle Development & Analysis Team)
Lee, Soon-Bok (한국과학기술원 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.28, no.4, 2004 , pp. 427-434 More about this Journal
Abstract
Ferritic stainless steel is recently used in high temperature structures because of its good properties of thermal fatigue resistance, corrosion resistance, and low price. Tensile and low-cycle fatigue (LCF) tests on 429EM stainless steel used in exhaust manifold were performed at several temperatures from room temperature to 80$0^{\circ}C$. Elastic Modulus, yield strength, and ultimate tensile strength monotonically decreased when temperature increased. Cyclic hardening occurred considerably during the most part of the fatigue life. Dynamic strain aging was observed in 200~50$0^{\circ}C$, which affects the cyclic hardening behavior. Among the fatigue parameters such as plastic strain amplitude, stress amplitude, and plastic strain energy density (PSED), PSED was a proper fatigue parameter since it maintained at a constant value during LCF deformation even though cyclic hardening occurs considerably. A phenomenological life prediction model using PSED was proposed considering the influence of temperature on fatigue life.
Keywords
Ferritic Stainless Steel; Cyclic Hardening; Life Prediction; High Temperature; Dynamic Strain Aging;
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Times Cited By KSCI : 2  (Citation Analysis)
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