机械工程学报 >

2018 , Vol. 54 >Issue 8: 129 - 136

DOI: https://doi.org/10.3901/JME.2018.08.129

材料科学与工程

6005-T6铝合金搅拌摩擦焊接微观组织演变计算及力学性能预测

  • 万震宇 ,
  • 周霞 ,
  • 张昭
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  • 1. 大连理工大学工业装备结构分析国家重点实验室 大连 116024;
    2. 大连理工大学工程力学系 大连 116024
万震宇,男,1988年出生,博士研究生。主要研究方向为搅拌摩擦焊接力学性能预测。E-mail:eagles0627@163.com

收稿日期: 2017-06-01

  修回日期: 2017-10-18

  网络出版日期: 2018-04-20

基金资助

国家自然科学基金资助项目（11572074，11172057）。

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Calculations of Microstructural Changes and Predictions of Mechanical Properties in Friction Stir Welding of AA6005-T6

  • WAN Zhenyu ,
  • ZHOU Xia ,
  • ZHANG Zhao
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  • 1. State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024;
    2. Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024

Received date: 2017-06-01

  Revised date: 2017-10-18

  Online published: 2018-04-20

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摘要

基于Al-Mg-Si系铝合金等温及非等温过程的微观结构演变规律，建立沉淀相粒子微观组织演变模型，包括沉淀相粒子的形核、长大、溶解以及粗化阶段。结合基于自适应网格重剖分的有限元热力耦合模型建立的6005-T6铝合金搅拌摩擦焊接的数值模拟，建立搅拌摩擦焊接过程中对于该种合金的组织演变和强化模型。通过充分考虑了固溶强化、沉淀强化对力学性能的影响，预测了AA6005-T6铝合金焊接接头组织的沉淀相变化及力学性能变化，预测结果与试验验证结果吻合良好。通过模拟计算焊后人工时效研究表明：焊接状态下焊接接头的软化区域在焊接核心区域范围；经过焊后人工时效后的接头软化区域集中在热影响区域，而焊接核心区域通过焊后人工时效后再次析出沉淀相，强度得到恢复。

关键词： 搅拌摩擦焊; 沉淀相; 力学性能预测; 组织演变

本文引用格式

万震宇 , 周霞 , 张昭 . 6005-T6铝合金搅拌摩擦焊接微观组织演变计算及力学性能预测[J]. 机械工程学报, 2018 , 54(8) : 129 -136 . DOI: 10.3901/JME.2018.08.129

Abstract

Based on the microstructural evolution rules on Al-Mg-Si alloy in isothermal and non-isothermal conditions, the precipitation evolution model is established. The nucleation, solid solution and the coarsening are comprehensively included in the established model. With combination of the adaptive-remeshing thermal-mechanical coupling FEM in numerical simulation of friction stir welding of 6005-T6, the microstructural evolution and the strengthening model of AA6005-T6 in friction stir welding is further established. With consideration of the solid solution strengthening and the precipitation strengthening, the evolutions of the second phase and the variations of the mechanical properties in friction stir welding of AA6005-T6 can be predicted. The comparison with the experimental data can validate the proposed models. By calculating the artificial ageing after welding process, a result can be clearly concluded. The soft region can be found in stirring zone area in as-welded condition, whereas the soft one lies in the heat affected zone after artificial ageing because of the reason that the re-precipitation occurs in the stirring zone.

Key words： friction stir welding; precipitation; mechanical property prediction; microstructure evolution

参考文献

[1] 薛鹏,张星星,吴利辉,等. 搅拌摩擦焊接与加工研究进展[J]. 金属学报, 2016, 52(10):1222-1238. XUE Peng, ZHANG Xingxing, WU Lihui, et al. Research progress on friction stir welding and processing, Acta Metallurgica Sinica, 2016, 52(10):1222-1238.
[2] 陈高强, 史清宇. 搅拌摩擦焊中材料流动行为数值模拟的研究进展[J]. 机械工程学报, 2015, 51(22):11-21. CHEN Gaoqiang, SHI Qingyu. Recent advances in numerical simulation of material flow behavior during frictions stir welding[J]. Journal of Mechanical Engineering, 2015, 51(22):11-21.
[3] 刘会杰,刘向前,胡琰莹. 搅拌摩擦焊缝类型对接头拉伸性能及断裂特征的影响[J]. 机械工程学报, 2015, 51(22):29-34. LIU Huijie, LIU Xiangqian, HU Yanying. Effects of weld characteristics on tensile properties and fracture morphologies of friction stir welded joints[J]. Journal of Mechanical Engineering, 2015, 51(22):29-34.
[4] 刘小超,武传松. 超声振动对6061-T4铝合金搅拌摩擦焊接头组织和性能的影响[J]. 焊接学报, 2014, 35(1):49-53. LIU Xiaochao, WU Chuansong. Effect of ultrasonic vibration on microstructure and mechanical properties of friction stir welded joint of 6061-T4 aluminum alloy[J]. Transactions of the China Welding Institution, 2014, 35(1):49-53.
[5] HE X C, GU F S, BALL A. A review of numerical analysis of friction stir welding[J]. Progress in Materials Science, 2014, 65:1-66.
[6] ZHANG Z, CHEN J T. Computational investigations on reliable finite element based thermo-mechanical coupled simulations of friction stir welding[J]. International Journal of Advanced Manufacturing Technology, 2012, 60:959-975.
[7] ZHU Y C, CHEN G Q, ZHANG G, et al. Simulation of material plastic flow driven by non-uniform friction force during friction stir welding and related defect prediction[J]. Materials & Design, 2016, 108:400-410.
[8] NANDAN R, ROY G G, LIENERT T J, et al. Three-dimensional heat and material flow during friction stir welding of mild steel[J]. Acta Materialia, 2007, 55:883-895.
[9] 石磊,武传松,刘会杰. 逆向差速搅拌摩擦焊接材料塑性流变和热场的数值模拟[J]. 机械工程学报, 2014, 50(16):140-146. SHI Lei, WU Chuansong, LIU Huijie. Modeling material plastic flow and thermal field in reverse dual-rotation friction stir welding[J]. Journal of Mechanical Engineering, 2014, 50(16):140-146.
[10] ZHANG Z, ZHANG H W. Solid mechanics-based Eulerian model of friction stir welding[J]. International Journal of Advanced Manufacturing Technology, 2014, 72:1647-1653.
[11] LI W Y, ZHANG Z H, LI J L, et al. Numerical analysis of joint temperature evolution during friction stir welding based on sticking contact[J]. Journal of Materials Engineering and Performance, 2012, 21(9):1849-1856.
[12] 张昭, 刘会杰. 搅拌头形状对搅拌摩擦焊材料变形和温度场的影响[J]. 焊接学报, 2011, 32(3):5-8. ZHANG Zhao, LIU Huijie. Effect of pin shapes on material deformation and temperature field in friction stir welding[J]. Transactions of the China Welding Institution, 2011, 32(3):5-8.
[13] 汪建华,姚舜,魏良武,等. 搅拌摩擦焊接的传热和力学计算模型[J]. 焊接学报, 2000, 21(4):61-64. WANG Jianhua,YAO Shun, WEI Liangwu, et al. Thermal and thermo-mechanical modelling of friction stir welding[J]. Transactions of the China Welding Institution, 2000, 21(4):61-64.
[14] 胡礼木, 胡波. 搅拌摩擦焊焊接温度数值模型及其影响因素[J]. 机械工程学报, 2006, 42(7):235-238. HU Limu, HU Bo. Numeric model of welding temperature in friction stir welding and affecting factors[J]. Chinese Journal of Mechanical Engineering, 2006, 42(7):235-238.
[15] 王大勇,冯吉才,王攀峰. 搅拌摩擦焊接热输入数值模型[J]. 焊接学报, 2005, 26(3):25-32. WANG Dayong, FENG Jicai, WANG Panfeng. Numerical model of heat input from rotational tool during friction stir welding[J]. Transactions of the China Welding Institution, 2005, 26(3):25-32.
[16] ZHANG Z, WU Q, GRUJICIC M, et al. Monte Carlo simulation of grain growth and welding zones in friction stir welding of AA6082-T6[J]. Journal of Materials Science, 2016, 51:1882-1895.
[17] ZHANG Z, WU Q. Numerical studies of tool diameter on strain rates, temperature rises and grain sizes in friction stir welding[J]. Journal of Mechanical Science and Technology, 2015, 29(10):4121-4128.
[18] SHERCLIFF H R, ASHBY M F. A process model for age hardening of aluminium alloys[J]. Acta Metallurgica et Materialia, 1990, 38(10):1789-1812.
[19] MYHR O R, GRONG Ø. Process modelling applied to 6082-T6 aluminium weldments[J]. Acta Metallurgica et Materialia, 1991, 39(11):2693-2708.
[20] SHERCLIFF H R, RUSSELL M J, TAYLOR A, et al. Microstructural modelling in friction stir welding of 2000 series aluminium alloys[J]. Mechanics & Industry, 2005, 6(01):25-35.
[21] FRIGAARD Ø, GRONG Ø, MIDLING O T. A process model for friction stir welding of age hardening aluminum alloys[J]. Metallurgical and Materials Transactions A, 2001, 32(5):1189-1200.
[22] MYHR O R, GRONG Ø. Modelling of non-isothermal transformations in alloys containing a particle distribution[J]. Acta Materialia, 2000, 48(7):1605-1615.
[23] WAGNER R, KAMPMANN R. Materials science and technology-a comprehensive treatment[M]. Weinhem:Wiley-VCH, 1991.
[24] ZHANG Z, WAN Z Y. Predictions of tool forces in friction stir welding of AZ91 magnesium alloy[J]. Science and Technology of Welding and Joining, 2012, 17(6):495-500.
[25] MYHR O R, GRONG Ø, ANDERSEN S J. Modelling of the age hardening behaviour of Al-Mg-Si alloys[J]. Acta Materialia, 2001, 49(1):65-75.
[26] ESMAEILI S, LLOYD D J, POOLE W J. A yield strength model for the Al-Mg-Si-Cu alloy AA6111[J]. Acta Materialia, 2003, 51(8):2243-2257.
[27] SIMAR A, BRÉCHET Y, de MEESTER B, et al. Sequential modeling of local precipitation, strength and strain hardening in friction stir welds of an aluminum alloy 6005A-T6[J]. Acta Materialia, 2007, 55:6133-6143.
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