X12CrMoWVNbN10-1-1钢的蠕变-疲劳交互作用及断裂机理
Creep-Fatigue Interaction and Fracture Mechanism of X12CrMoWVNbN10-1-1 Steel
摘 要
在620℃下对X12CrMoWVNbN10-1-1钢进行不同应力比（0.2~0.4）和保载时间（0.3~1.5 h）下的载荷控制的高位保载蠕变-疲劳试验，对其蠕变-疲劳交互作用及断裂机理进行了分析。结果表明：试验钢的蠕变-疲劳寿命与保载时间呈指数关系，保载时间越长，应力比对蠕变-疲劳寿命的影响越小；从应变角度定义的蠕变-疲劳交互作用因子能够很好地反映稳定阶段的真应力-真应变迟滞回线与蠕变-疲劳寿命的相互作用；试验钢的蠕变-疲劳断裂模式为韧性断裂；当保载时间较短（0.3，0.5 h）时，疲劳损伤抑制蠕变损伤，损伤主要受循环中的疲劳载荷控制，断口中韧窝由疲劳主导作用下的晶界滑移变形引起；当保载时间较长（1.0，1.5 h）时，疲劳损伤促进蠕变损伤，损伤主要受与时间有关的蠕变载荷控制，断口中韧窝由夹杂物或第二相颗粒脱落所致。
蠕变-疲劳寿命
蠕变-疲劳交互作用
断口形貌
X12CrMoWVNbN10-1-1 steel
creep-fatigue life
creep-fatigue interaction
fracture morphology
Abstract
The creep-fatigue tests with load holding at maximum stress controlled by load with different stress ratios (0.2-0.4) and holding times (0.3-1.5 h) of X12CrMoWVNbN10-1-1 steel at 620℃ were carried out, and the creep-fatigue interaction and fracture mechanism of the steel were analyzed. The results show that the creep-fatigue life of the test steel had exponent relation with the holding time. The longer the loading time, the less the influence of stress ratio on creep-fatigue life. The creep fatigue interaction factor defined from the view of strain could well reflect the interaction between the true stress-true strain hysteretic curve and the creep fatigue life in the stable stage. The creep-fatigue fracture mode of the test steel was ductile fracture. When the holding time was short of 0.3, 0.5 h, the fatigue damage suppressed creep damage, and the damage was mainly controlled by cyclic fatigue load; the dimples on the fracture were caused by crystal boundary slide controlled by fatigue. When the holding time was long enough of 1.0, 1.5 h, the fatigue damage promoted creep damage, and the damage was mainly controlled by time-related creep load; the dimples on the fracture were caused by detachment of inclusions or second phase particles.
中图分类号 TG113.25 TH140.7 DOI 10.11973/jxgccl202301005
所属栏目 试验研究
基金项目 上海市自然科学基金资助项目（19ZR1420300）
收稿日期 2021/12/28
修改稿日期 2022/11/18
网络出版日期
作者单位点击查看
备注畅旭兵(1986-),男,山西运城人,工程师,学士
引用该论文: CHANG Xubing,WANG Yong,LIN Lin,JI Dongmei. Creep-Fatigue Interaction and Fracture Mechanism of X12CrMoWVNbN10-1-1 Steel[J]. Materials for mechancial engineering, 2023, 47(1): 34～41
畅旭兵,王勇,林琳,纪冬梅. X12CrMoWVNbN10-1-1钢的蠕变-疲劳交互作用及断裂机理[J]. 机械工程材料, 2023, 47(1): 34～41
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【3】HU J, LIU F, CHENG G X, et al.Life prediction of steam generator tubing due to stress corrosion crack using Monte Carlo Simulation[J].Nuclear Engineering and Design, 2011, 241(10):4289-4298.
【4】轩福贞, 宫建国.基于损伤模式的压力容器设计原理[M].北京:科学出版社, 2020. XUAN F Z, GONG J G.Fundamental and approaches for damage mode-based design of pressure vessels[M].Beijing:Science Press, 2020.
【5】BAI Y L, WANG H Y, XIA M F, et al.Statistical mesomechanics of solid, linking coupled multiple space and time scales[J].Applied Mechanics Reviews, 2005, 58(6):372-388.
【6】FOURNIER B, SAUZAY M, BARCELO F, et al.Creep-fatigue interactions in a 9 pct Cr-1 Pct Mo martensitic steel:Part II.Microstructural evolutions[J].Metallurgical and Materials Transactions A, 2009, 40(2):330-341.
【7】SAWADA K, KUBO K, ABE F.Creep behavior and stability of MX precipitates at high temperature in 9Cr-0.5Mo-1.8W-VNb steel[J].Materials Science and Engineering:A, 2001, 319/320/321:784-787.
【8】AOTO K, KOMINE R, UENO F, et al.Creep-fatigue evaluation of normalized and tempered modified 9Cr-1Mo[J].Nuclear Engineering and Design, 1994, 153(1):97-110.
【9】殷凤仕, 杨钢, 李茹, 等.X12CrMoWVNbN10-1-1耐热钢的组织和高温力学性能[J].材料热处理学报, 2012, 33(12):72-75. YIN F S, YANG G, LI R, et al.Microstructure and high temperature mechnical properties of X12CrMoWVNbN10-1-1 heat resistant steel[J].Transactions of Materials and Heat Treatment, 2012, 33(12):72-75.
【10】Zhao P, Xuan F Z. Study on creep-fatigue damage evaluation for advanced 9%-12% chromium steels under stress controlled cycling[J]. Acta Metallurgica Sinica. 2011, 24(2):148-154.
【11】ZHAO P, XUAN F Z.Ratchetting behavior of advanced 9-12% chromium ferrite steel under creep-fatigue loadings:Fracture modes and dislocation patterns[J].Materials Science and Engineering:A, 2012, 539:301-307.
【12】ZHAO P, XUAN F Z.Ratchetting behavior of advanced 9-12% chromium ferrite steel under creep-fatigue loadings[J].Mechanics of Materials, 2011, 43(6):299-312.
【13】KARTHIKEYAN T, DASH M K, RAVIKIRANA, et al.Effect of prior-austenite grain refinement on microstructure, mechanical properties and thermal embrittlement of 9Cr-1Mo-0.1C steel[J].Journal of Nuclear Materials, 2017, 494:260-277.
【14】WU D L, XUAN F Z, GUO S J, et al.Uniaxial mean stress relaxation of 9-12% Cr steel at high temperature:Experiments and viscoplastic constitutive modeling[J].International Journal of Plasticity, 2016, 77:156-173.
【15】GIROUX P F, DALLE F, SAUZAY M, et al.Influence of strain rate on P92 microstructural stability during fatigue tests at high temperature[J].Procedia Engineering, 2010, 2(1):2141-2150.
【16】GOPINATH K, GUPTA R K, SAHU J K, et al.Designing P92 grade martensitic steel header pipes against creep-fatigue interaction loading condition:Damage micromechanisms[J].Materials & Design, 2015, 86:411-420.
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【21】CHEN J J, JI D M, CAI X D, et al.Effect of holding duration at maximum and minimum stress on creep fatigue interaction of P92 steel[J].Materials at High Temperatures, 2020, 37(1):51-60.
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