高温合金激光冲击强化数值模拟及其疲劳寿命预测
Numerical Simulation of Laser Shock Peening for Superalloy and Fatigue Life Prediction
摘 要
建立了激光冲击强化宏观有限元数值模型和细观参量演化数值模型，提出了激光冲击强化三维多尺度模拟方法，分析了激光冲击强化后Inconel 718高温合金残余应力、位错密度、晶粒尺寸的分布规律；考虑激光冲击强化所致残余应力和晶粒细化对疲劳寿命的影响，对Sines疲劳寿命准则进行修正，并进行了试验验证。结果表明：模拟得到试样表面光斑冲击范围内形成了不小于550 MPa的残余压应力，表层区域存在明显的位错增殖，局部晶粒尺寸可细化25%左右，模拟结果与试验结果基本吻合；采用修正Sines准则预测得到的疲劳寿命在3倍分散带内，说明该模型能够较好地预测激光冲击强化后Inconel 718高温合金的疲劳寿命。
残余应力
位错密度
晶粒尺寸
疲劳寿命预测
laser shock peening
residual stress
dislocation density
grain size
fatigue life prediction
Abstract
The macroscopic finite element numerical model and the mesoscopic parametric evolution numerical model of laser shock peening were established. A three-dimensional multi-scale simulation method for laser shock peening was proposed. The distribution law of residual stress, dislocation density and grain size of Inconel 718 superalloy after laser shock peening was analyzed. The Sines fatigue life criterion was modified considering the influence of residual stress and grain refinement caused by laser shock peening on fatigue life, and was verified by tests. The results show that residual compressive stresses no less than 550 MPa within the impact range of the light spot on the sample surface were obtained by simulation; significant dislocation proliferation existed in the surface area, and the local grain size could be refined by about 25%; the simulation was basically consistent with the test results. The fatigue lives predicted by the modified Sines criterion were within 3 times the dispersion band, indicating that the model could predict the fatigue life of Inconel 718 superalloy after laser shock peening.
中图分类号 V261.93 DOI 10.11973/jxgccl202110013
所属栏目 物理模拟与数值模拟
基金项目 国家自然科学基金资助项目（51675024）
收稿日期 2020/9/3
修改稿日期 2021/8/5
网络出版日期
作者单位点击查看
备注郭小军(1983—),男,湖南株洲人,高级工程师,博士
引用该论文: GUO Xiaojun,SU Xiao,HU Dianyin. Numerical Simulation of Laser Shock Peening for Superalloy and Fatigue Life Prediction[J]. Materials for mechancial engineering, 2021, 45(10): 97～103
郭小军,苏潇,胡殿印. 高温合金激光冲击强化数值模拟及其疲劳寿命预测[J]. 机械工程材料, 2021, 45(10): 97～103
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参考文献
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【2】段志勇.激光冲击波及激光冲击处理技术的研究[D].合肥:中国科学技术大学, 2000. DUAN Z Y.Study on laser shock and laser shock treatment technology[D]. Hefei:University of Science and Technology of China, 2000.
【3】宋巍, 邹世坤, 曹子文.激光冲击处理在核工业焊接结构上的应用[J].航空制造技术, 2014, 57(14):89-91. SONG W, ZOU S K, CAO Z W.Application of laser peening on weld structure nuclear industry[J].Aeronautical Manufacturing Technology, 2014, 57(14):89-91.
【4】李伟, 李应红, 何卫锋, 等.激光冲击强化技术的发展和应用[J].激光与光电子学进展, 2008, 45(12):15-19. LI W, LI Y H, HE W F, et al.Development and application of laser shock processing[J].Laser & Optoelectronics Progress, 2008, 45(12):15-19.
【5】李微, 许栋梁, 左炉, 等.激光冲击强化对太阳能热发电用渗铝钢显微组织和高温拉伸性能的影响[J].表面技术, 2019, 48(1):1-9. LI W, XU D L, ZUO L, et al.Effect of laser shock strengthening on microstructure and high temperature tensile properties of aluminized steel for solar thermal power generation[J].Surface Technology, 2019, 48(1):1-9.
【6】邹世坤, 巩水利, 郭恩明, 等.发动机整体叶盘的激光冲击强化技术[J].中国激光, 2011, 38(6):0601009. ZOU S K, GONG S L, GUO E M, et al.Laser peening of turbine engine integrally blade rotor[J].Chinese Journal of Lasers, 2011, 38(6):0601009.
【7】胡殿印, 李金俊, 邓珊, 等.基于残余应力的激光冲击强化参数多目标优化[J].推进技术, 2018, 39(7):1590-1596. HU D Y, LI J J, DENG S, et al.Multi-objective optimization on laser shock peening parameters based on residual stress[J].Journal of Propulsion Technology, 2018, 39(7):1590-1596.
【8】CORREA C, RUIZ DE LARA L, DÍAZ M, et al.Effect of advancing direction on fatigue life of 316L stainless steel specimens treated by double-sided laser shock peening[J].International Journal of Fatigue, 2015, 79:1-9.
【9】CORREA C, RUIZ DE LARA L, DÍAZ M, et al.Influence of pulse sequence and edge material effect on fatigue life of Al2024-T351 specimens treated by laser shock processing[J].International Journal of Fatigue, 2015, 70:196-204.
【10】HUANG S, ZHOU J Z, JIANG S Q, et al.Experimental study on laser shock peening of AZ31B magnesium alloy sheet[J].Materials Science Forum, 2009, 628/629:691-696.
【11】王文兵, 陈东林, 周留成.激光冲击强化残余应力场的数值仿真分析[J].塑性工程学报, 2009, 16(6):127-130. WANG W B, CHEN D L, ZHOU L C.Numerical simulation analysis on residual stress field for laser shock processing[J].Journal of Plasticity Engineering, 2009, 16(6):127-130.
【12】胡永祥.激光冲击处理工艺过程数值建模与冲击效应研究[D].上海:上海交通大学, 2008. HU Y X.Research on the numerical simulation and impact effects of laser shock processing[D].Shanghai:Shanghai Jiaotong University, 2008.
【13】DING H T, SHIN Y C.Dislocation density-based modeling of subsurface grain refinement with laser-induced shock compression[J].Computational Materials Science, 2012, 53(1):79-88.
【14】NALLA R K, ALTENBERGER I, NOSTER U, et al.On the influence of mechanical surface treatments-Deep rolling and laser shock peening-On the fatigue behavior of Ti-6Al-4V at ambient and elevated temperatures[J].Materials Science and Engineering:A, 2003, 355(1/2):216-230.
【15】REN X D, ZHAN Q B, YANG H M, et al.The effects of residual stress on fatigue behavior and crack propagation from laser shock processing-worked hole[J].Materials & Design, 2013, 44:149-154.
【16】JOHNSON G R, COOK W H.A constitutive model and data for metals subjected to large strains, high strain rates and high temperatures[J].Engineering Fracture Mechanics, 1983, 21:541-548.
【17】中国航空材料手册[M]. 北京:清华大学出版社, 2013. China aviation materials handbook[M].Beijing:Tsinghua University Press, 2013.
【18】FABBRO R, FOURNIER J, BALLARD P, et al.Physical study of laser-produced plasma in confined geometry[J].Journal of Applied Physics, 1990, 68(2):775-784.
【19】TO'TH L S, MOLINARI A, ESTRIN Y.Strain hardening at large strains as predicted by dislocation based polycrystal plasticity model[J].Journal of Engineering Materials and Technology, 2002, 124(1):71-77.
【20】LAPOVOK R, DALLA TORRE F H, SANDLIN J, et al.Gradient plasticity constitutive model reflecting the ultrafine micro-structure scale:The case of severely deformed copper[J].Journal of the Mechanics and Physics of Solids, 2005, 53(4):729-747.
【21】LEMIALE V, ESTRIN Y, KIM H S, et al.Grain refinement under high strain rate impact:A numerical approach[J].Computational Materials Science, 2010, 48(1):124-132.
【22】MCKENZIE P W J, LAPOVOK R, ESTRIN Y.The influence of back pressure on ECAP processed AA 6016:Modeling and experiment[J].Acta Materialia, 2007, 55(9):2985-2993.
【23】HASSANI-GANGARAJ S M, CHO K S, VOIGT H J L, et al.Experimental assessment and simulation of surface nanocrystallization by severe shot peening[J].Acta Materialia, 2015, 97:105-115.
【24】BAIK S C, ESTRIN Y, KIM H S, et al.Dislocation density-based modeling of deformation behavior of aluminium under equal channel angular pressing[J].Materials Science and Engineering:A, 2003, 351(1/2):86-97.
【25】KATTOURA M, MANNAVA S R, QIAN D, et al.Effect of laser shock peening on residual stress, microstructure and fatigue behavior of ATI 718Plus alloy[J].International Journal of Fatigue, 2017, 102:121-134.
【26】SINES G. Behaviour of metals under complex static and alternating stresses[J]. Metal Fatigue, 1959, 1:145-169..
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