Modeling of the deformation behavior of single crystalline Nickel-based superalloys under thermal mechanical loading

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• 作者：F. Wilhelm^a ; ^b ; ^{franz.wilhelm@mtu.de} ; E. Affeldt^b ; ^{ernst.affeldt@mtu.de} ; E. Fleischmann^c ; U. Glatzel^c ; ^{uwe.glatzel@uni-bayreuth.de} ; J. Hammer^a ; ^{joachim.hammer@oth-regensburg.de}
• 关键词：Single crystalline Nickel-based superalloys ; Thermal-mechanical fatigue ; Threshold stress concept ; Modeling ; Creep ; Plasticity
• 刊名：International Journal of Fatigue
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：97
• 期：Complete
• 页码：1-8
• 全文大小：1635 K
• 卷排序：97

文摘

The threshold stress concept is suitable to describe the creep behavior of dual phase alloys. The Lagneborg-Bergmann-plot is used to assign the strength of the matrix and the γ′-phase. The deformation behavior can be modelled by Hooke’s Law, Ramberg-Osgood equation and the threshold stress concept. The dwell time increases the time dependent deformation and decreases the lifetime to a large extent.