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转速对7055铝合金搅拌摩擦焊接头断裂特征的影响

金玉花, 霍仁杰, 李常锋, 王希靖

金玉花, 霍仁杰, 李常锋, 王希靖. 转速对7055铝合金搅拌摩擦焊接头断裂特征的影响[J]. 焊接学报, 2017, 38(2): 10-13,18.
引用本文: 金玉花, 霍仁杰, 李常锋, 王希靖. 转速对7055铝合金搅拌摩擦焊接头断裂特征的影响[J]. 焊接学报, 2017, 38(2): 10-13,18.
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JIN Yuhua, HUO Renjie, LI Changfeng, WANG Xijing. Influence of rotational speed on fracture characteristics of 7055 aluminum alloy friction stir welded joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(2): 10-13,18.
Citation: JIN Yuhua, HUO Renjie, LI Changfeng, WANG Xijing. Influence of rotational speed on fracture characteristics of 7055 aluminum alloy friction stir welded joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(2): 10-13,18.
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转速对7055铝合金搅拌摩擦焊接头断裂特征的影响

  • 1.

    兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室, 兰州 730050

  • 2.

    兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室, 兰州 730050;辽宁轨道交通职业学院 机械工程系, 沈阳 110023

基金项目: 国家自然科学基金资助项目（51265030）；甘肃省高等学校基本科研业务费资助项目（01-0071）；兰州市科技局资助项目（01-0065）；兰州理工大学博士基金资助项目（01-0765）

Influence of rotational speed on fracture characteristics of 7055 aluminum alloy friction stir welded joints

  • 1.

    State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China

  • 2.

    State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China;Department of Mechanical Engineering, Guidao Jiaotong Polytechnic Institute, Shenyang 110023, China

摘要

    摘要
  • 摘要: 采用搅拌摩擦焊对5 mm厚7055铝合金进行对接试验，通过拉伸试验研究不同转速接头断裂位置及其横截面的显微组织，断口形貌特征.结果表明，随着转速的提高，薄弱区发生了转移：当转速为700~800 r/min时，接头在热影响区发生45°剪切断裂；当转速提高至900~1 100 r/min时，接头在焊核区发生"S"形断裂；进一步提高转速至1 200~1 400 r/min时，接头沿着前进侧热力影响区或前进侧热力影响区与焊核区边界发生断裂.断口形貌分析表明，热影响区断口呈现大而深的韧窝，焊核区断口呈现小而浅的韧窝，均属韧性断裂；热力影响区边界断口呈韧-脆混合断裂特征.
    Abstract: The butt welding process of friction stir welding was used on 5 mm thick 7055 aluminum alloy. The characteristics of fracture locations, microstructures of fracture cross-section and fracture surfaces of different rotational speed were investigated by tensile test. The results shows that with the increase of rotational speed, the weak zone has shifted. When rotational speed was 700~800 r/min, The fracture occurs in the heat affected zone (HAZ) was 45°shear fracture; With the rotational speed increased from 900~1 100 r/min, the fracture morphologies on the joint cross-section which fraction occurs in the nugget zone (NZ) was "S-type" fracture. Furthermore, when the rotational speed increased from 1 200~1 400 r/min, fracture occurred in the thermo-mechanically affected zone (TMAZ) of advancing side or at the border between the TMAZ of advancing side and the nugget zone. Fracture morphology analysis shows that big and deep dimples were found in the HAZ, small and shallow dimples were found in the NZ,both of them belong to the ductile fracture of eaem. The mixed ductile brittle fracture characteristic was performed in the TMAZ boundary.
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    • 参考文献(9)
  • [1] 邓运来, 万 里, 李 鑫, 等. 7055铝合金晶界η相回归阶段的粗化动力学[J]. 中国有色金属学报, 2014, 24(4):888-893. Deng Yunlai, Wan Li, Li Xin, et al. Coarsening kinetics of grain boundary precipitates in 7055aluminium alloy[J]. TheChineseJournal ofNonferrous Metals, 2014, 24(4):888-893.
    [2] 陈军洲. AA7055铝合金的时效析出行为与力学性能[D]. 哈尔滨:哈尔滨工业大学, 2009.
    [3] Sivaraj P, Kanagarajan D, Balasubramanian V. Effect of post weld heat treatment on tensile properties and microstructure characteristics offriction stir welded armour gradeAA7075-T651aluminium alloy[J]. DefenceTechnology, 2014, 10(1):1-8.
    [4] 佟建华, 张 坤, 林 松, 等. 搅拌摩擦焊和熔化极气体保护焊6082铝合金疲劳性能分析[J]. 焊接学报, 2015, 36(7):90-94. Tong Jianhua, Zhang Kun, Lin Song, et al.Comparison offatigue property of6082aluminum alloy joint by friction stir welding and metal inert-gas welding[J]. Transactions of theChinaWelding Institution, 2015, 36(7):90-94.
    [5] 李 达, 孙明辉, 崔占全. 工艺参数对铝镁搅拌摩擦焊焊缝成形质量的影响[J]. 焊接学报, 2011, 32(8):97-100. Li Da, Sun Minghui, Cui Zhanquan. Effect of parameters on friction stir welding joint of7075Al and AZ31BMg[J]. Transactions of theChinaWelding Institution, 2011, 32(8):97-100.
    [6] 严 铿, 刘 俊, 史 超. 喷射成形7055铝合金FSW焊工艺与性能[J]. 焊接学报, 2012, 33(6):50-54. Yan Keng, LiuJun, Shi Chao. Study on process and property ofFSW of spray formed 7055aluminum alloy[J]. Transactions of theChinaWelding Institution, 2012, 33(6):50-54.
    [7] Dixit M, MishraRS, Sankaran KK. Structure-property correlations in Al 7050and Al 7055 high-strength aluminum alloys[J]. Materials Scienceand Engineering:A, 2008, 478(1):163-172.
    [8] 许俊华, 赵立军, 施林波, 等. 喷射成形7055铝合金搅拌摩擦焊的焊缝组织与力学性能[J]. 粉末冶金材料科学与工程, 2011, 16(4):547-552. XuJunhua, Zhao Lijun, Shi Linbo, et al. Microstructureand mechanical properties of joints offriction stir welding 7055Al alloys by spray formation[J]. Materials Scienceand Engineering ofPowder Metallurgy, 2011, 16(4):547-552.
    [9] Hovanski Y, Carsley J, ClarkeK, et al. Friction-stir welding and processing[J]. TheMinerals, Metals & Materials Society, 2015, 67(5):996-999.
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  • 收稿日期:  2015-02-04

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