High-Temperature Low-Cycle Fatigue Behavior of MarBN at 600 °C

被引：10
|
作者：
Barrett, Richard A. [1 ,2 ]
O'Hara, Eimear M. [1 ,2 ]
O'Donoghue, Padraic E. [2 ,3 ]
Leen, Sean B. [1 ,2 ]
机构：
[1] NUI Galway, Mech Engn, Univ Rd, Galway H91 HX31, Ireland
[2] NUI Galway, Ryan Inst Environm Marine & Energy Res, Univ Rd, Galway H91 HX31, Ireland
[3] NUI Galway, Civil Engn, Univ Rd, Galway H91 HX31, Ireland
来源：
JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME | 2016年 / 138卷 / 04期
基金：
爱尔兰科学基金会;
关键词：
MarBN; cyclic viscoplasticity; high-temperature low-cycle fatigue; VISCOPLASTIC CONSTITUTIVE-EQUATIONS; IV FRACTURE; P91; STEEL; MODEL; SUPPRESSION; EVOLUTION; JOINTS;
D O I：
10.1115/1.4031724
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
This paper presents the high-temperature low-cycle fatigue (HTLCF) behavior of a precipitate strengthened 9Cr martensitic steel, MarBN, designed to provide enhanced creep strength and precipitate stability at high temperature. The strain-controlled test program addresses the cyclic effects of strain-rate and strain-range at 600 degrees C, as well as tensile stress-relaxation response. A recently developed unified cyclic viscoplastic material model is implemented to characterize the complex cyclic and relaxation plasticity response, including cyclic softening and kinematic hardening effects. The measured response is compared to that of P91 steel, a current power plant material, and shows enhanced cyclic strength relative to P91.
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页数：8
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