刘曹文,廖凯,陈家伟,李立君

• 1:中南林业科技大学机电工程学院

摘要(Abstract)：

为探究不同喷丸工艺参数对7075-T651铝合金表面粗糙度(R_a)的影响,首先利用ANSYS/LS-DYNA建立了三维动态喷丸有限元模型,然后根据R_a离散化计算式采集模型节点位移数据,获得了不同覆盖率、喷射距离、弹丸直径和喷射压力下的表面粗糙度值,再结合表面粗糙度、硬度和应力测试结果,分析不同工艺参数对7075-T651铝合金表面粗糙度和表面硬度的影响。结果表明:合金表面粗糙度的模拟计算值和实验值的最大偏差为11.3%,差值仅为0.59μm,且合金硬度和表面粗糙度的变化趋势具有一致性,论证了模型计算结果的准确性与可靠性。结合应力云图和表面粗糙度结果发现,在同等表面粗糙度下,采用"大丸粒+小压力"喷丸试样表面应力分布更均匀,且其最大残余压应力值较小丸粒+大压力试样降低约12.8%。分析认为,随喷射压力和弹丸直径的增大,合金表面塑性变形剧烈,冷作硬化效果明显,其粗糙度有增大的趋势,表面硬度也相应提高,而加大喷射距离和提高覆盖率,会增加表面弹坑反复变形的次数,使表面粗糙度值逐渐减小。同时,结合喷丸实验效果,大丸粒小压力喷丸工艺可在残余压应力和表面粗糙度参数之间取得良好的效果。

关键词(KeyWords)： 7075-T651铝合金;喷丸;表面粗糙度;有限元模型

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51475483);; 湖南省重点研发计划(2018NK2065,2019NK2022)

作者(Author): 刘曹文,廖凯,陈家伟,李立君

DOI: 10.13289/j.issn.1009-6264.2020-0502

参考文献(References)：

• [1] 焦慧彬，陈康华，陈送义，等.Zr和Si对Al-Zn-Mg-Cu铝合金再结晶行为和性能的影响[J].吉林大学学报(工学版),2019,49(2):544-551.JIAO Hui-bin,CHEN Kang-hua,CHEN Song-yi,et al.Effects of Zr and Si additions on the recrystallization behavior of Al-Zn-Mg-Cu aluminum alloy[J].Journal of Jilin University(Engineering and Technology Edition),2019,49(2):544-551.
• [2] 刘辰辰，陈亚军，李柯，等.7075航空铝合金原位腐蚀-多轴疲劳行为分析[J].中国机械工程，2019,30(5):615-621.LIU Chen-chen,CHEN Ya-jun,LI Ke,et al.Analysis for in-situ corrosion-multiaxial fatigue behaviors of 7075 aerospace aluminum alloys[J].China Mechanical Engineering,2019,30(5):615-621.
• [3] 张允康，许晓静，罗勇，等.7075铝合金强化固溶T76处理后的拉伸与剥落腐蚀性能[J].稀有金属材料与工程，2012,41(S2):612-615.ZHANG Yun-kang,XU Xiao-jing,LUO Yong,et al.Tensile property and exfoliation corrosion of 7075 aluminum alloy after enhanced-solid-solution T76 aging treatment[J].Rare Metal Materials and Engineering,2012,41(S2):612-615.
• [4] Benedetti M,Fontanari V,Bandini M,et al.High-and very high-cycle plain fatigue resistance of shot peened high-strength aluminum alloys:The role of surface morphology[J].International Journal of Fatigue,2015,70:451-462.
• [5] 李占明，王红美，孙晓峰，等.高速微粒轰击对微弧氧化铝合金疲劳性能的影响[J].稀有金属材料与工程，2018,47(7):2179-2184.LI Zhan-ming,WANG Hong-mei,SUN Xiao-feng,et al.Effect of high-speed particles bombarding pre-treatment on the fatigue properties of micro-arc oxidation aluminum alloy[J].Rare Metal Materials and Engineering,2018,47(7):2179-2184.
• [6] Segurado E,Belzunce F J,Pariente I.Effects of low intensity shot peening treatments applied with different types of shots on the fatigue performance of a high-strength steel[J].Surface and Coatings Technology,2018,340:25-35.
• [7] 李鹏，刘道新，关艳英，等.喷丸强化对新型7055-T7751铝合金疲劳性能的影响[J].机械工程材料，2015,39(1):86-89.LI Peng,LIU Dao-xin,GUAN Yan-ying,et al.Effect of shot peening on fatigue properties of new aluminum alloy 7055-T7751[J].Materials for Mechanical Engineering,2015,39(1):86-89.
• [8] 张彩珍，杨健，魏磊，等.航空发动机钛合金叶片喷丸强化残余应力研究[J].表面技术，2016,45(4):208-212.ZHANG Cai-zhen,YANG Jian,WEI Lei,et al.Shot peening residual stress of aeroengine titanium alloy blades[J].Surface Technology,2016,45(4):208-212.
• [9] Liu Z Hg,Xiu L,Wu J F,et al.Numerical simulation on residual stress eliminated by shot peening using SPH method[J].Fusion Engineering and Design,2019,147:111231.1-111231.6.
• [10] Baherifard S,Hickey D J,Stanislaya Fintová,et al.Effects of nanofeatures induced by severe shot peening (SSP) on mechanical,corrosion and cytocompatibility properties of magnesium alloy AZ31[J].Acta Biomaterialia,2018,66:93.
• [11] 王征，蔡晋，王小明，等.表面粗糙度对钛合金超声波喷丸强化影响的有限元分析[J].材料保护，2020,53(3):16-21.WANG Zheng,CAI Jin,WANG Xiao-ming,et al.Finite element analysis of effect of surface roughness on ultrasonic shot peening of titanium alloy[J].Materials Protection,2020,53(3):16-21.
• [12] 周文龙，吕成，李烨，等.喷丸强度对316不锈钢表面完整性及疲劳寿命的影响[J].表面技术，2020,49(7):230-237.ZHOU Wen-long,Lü Cheng,LI Ye,et al.Effect of shot peening intensity on surface integrity and fatigue life of 316 stainless steel[J].Surface Technology,2020,49(7):230-237.
• [13] Laneza V,Belzunce F J.Study of the effects produced by shot peening on the surface of quenched and tempered steels:roughness,residual stresses and work hardening[J].Applied surface science,2015,356:475-485.
• [14] Liu Y G,Li M Q,Liu H J.Nanostructure and surface roughness in the processed surface layer of Ti-6Al-4V via shot peening[J].Materials Characterization,2017,123:83-90.
• [15] 王利平.喷丸残余应力场及表面粗糙度数值模拟研究[D].济南：山东大学，2015.WANG Li-ping.Numerical simulation research for compressive residual stress field and surface roughness of shot peening[D].Ji'nan:Shandong University,2015.
• [16] Lin Q,Liu H,Zhu C,et al.Effects of different shot peening parameters on residual stress,surface roughness and cell size[J].Surface and Coatings Technology,2020,398:126054-126064.
• [17] Pham T Q,Khun N.W.,Bueler D L.New approach to estimate coverage parameter in 3D FEM shot peening simulation[J].Surface Engineering,2017,33(9):687-695.
• [18] Unal Okan,Varol R.Surface severe plastic deformation of AISI 304 via conventional shot peening,severe shot peening and repeening[J].Applied Surface Science,2015,351:289-295.
• [19] Wu J,Liu H,Wei P,et al.Effect of shot peening coverage on residual stress and surface roughness of 18CrNiMo7-6 steel[J].International Journal of Mechanical Sciences,2020,183:105785.
• [20] Wang C,Wang C,Wang L,et al.A dislocation density-based comparative study of grain refinement,residual stresses,and surface roughness induced by shot peening and surface mechanical attrition treatment[J].The International Journal of Advanced Manufacturing Technology,2020,108(1):505-525.
• [21] 徐戊矫，刘承尚，鲁鑫垚.喷丸处理后6061铝合金工件表面粗糙度的模拟计算及预测[J].吉林大学学报(工学版),2019,49(4):1280-1287.XU Wu-jiao,LIU Cheng-shang,LU Xin-yu.Simulation and prediction of surface roughness of 6061 aluminum alloy workpiece after shot peening[J].Journal of Jilin University(Engineering and Technology Edition):2019,49(4):1280-1287.
• [22] 陈家伟，廖凯，李立君，等.不同丸粒对铝合金表面喷丸影响的仿真分析及实验[J].表面技术，2019,48(9):121-126.CHEN Jia-wei,LIAO Kai,LI Li-jun,et al.Simulation and experiment for surface characteristics of Al-based alloy between different shot peening projectiles[J].Surface Technology,2019,48(9):121-126.
• [23] 强斌，李亚东，顾颖，等.钢板喷丸处理残余应力场和表面粗糙度数值模拟[J].西南交通大学学报，2015,50(4):691-697.QIANG Bin,LI Ya-dong,GU Ying,et al.Numerical simulation of residual stress field and surface roughness for steel plate subjected to shot peening[J].Journal of Southwest Jiaotong University,2015,50(4):691-697.
• [24] Xie L C,Wang C X,Wang L Q,et al.Numerical analysis and experimental validation on residual stress distribution of titanium matrix composite after shot peening treatment[J].Mechanics of Materials,2016,99:2-8.
• [25] Han K,Owen D R J,Pric D.Combined finite/discrete element and explicit/implicit simulations of peen forming process[J].Engineering Computations,2002,19(1):92-118.
• [26] 陈家伟，廖凯，车兴飞，等.铝合金喷丸应力-变形的仿真分析与实验[J].表面技术，2018,47(11):41-47.CHEN Jia-wei,LIAO Kai,CHE Xing-fei,et al.Simulation and experiment study of surface stress-deformation by shot peening on Al-based alloy[J].Surface Technology,2018,47(11):41-47.
• [27] 王利平，王建明，裴信超，等.喷丸残余应力场SPH/FEM耦合建模与仿真[J].郑州大学学报(工学版),2014,35(6):108-112.WANG Li-ping,WANG Jian-ming,PEI Xin-chao,et al.Numerical simulation for residual compressive stress of shot peening based on SPH coupled FEM[J].Journal of Zhengzhou University(Engineering science),2014,35(6):108-112.

文章评论(Comment)：