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钛/铝层合板双面电子束焊接接头界面行为及力学性能

巩鹏飞 陈洪胜 王文先 柴斐 汪卓然 高会良

巩鹏飞, 陈洪胜, 王文先, 等. 钛/铝层合板双面电子束焊接接头界面行为及力学性能[J]. 复合材料学报, 2023, 40(11): 6439-6449. doi: 10.13801/j.cnki.fhclxb.20221221.002
引用本文: 巩鹏飞, 陈洪胜, 王文先, 等. 钛/铝层合板双面电子束焊接接头界面行为及力学性能[J]. 复合材料学报, 2023, 40(11): 6439-6449. doi: 10.13801/j.cnki.fhclxb.20221221.002
GONG Pengfei, CHEN Hongsheng, WANG Wenxian, et al. Interface behavior and mechanical properties of double-sided electron beam welded joint of Ti/Al laminate plates[J]. Acta Materiae Compositae Sinica, 2023, 40(11): 6439-6449. doi: 10.13801/j.cnki.fhclxb.20221221.002
Citation: GONG Pengfei, CHEN Hongsheng, WANG Wenxian, et al. Interface behavior and mechanical properties of double-sided electron beam welded joint of Ti/Al laminate plates[J]. Acta Materiae Compositae Sinica, 2023, 40(11): 6439-6449. doi: 10.13801/j.cnki.fhclxb.20221221.002

钛/铝层合板双面电子束焊接接头界面行为及力学性能

doi: 10.13801/j.cnki.fhclxb.20221221.002
基金项目: 山西省重点研发计划(202102150401003);中央引导地方项目(YDZJSX2022 A018);大学生创新创业训练计划项目(20210078)
详细信息
    通讯作者:

    陈洪胜,博士,副教授,硕士生导师,研究方向为先进金属基复合材料制备及成形技术 E-mail: chenhongsheng@tyut.edu.cn

  • 中图分类号: TB331

Interface behavior and mechanical properties of double-sided electron beam welded joint of Ti/Al laminate plates

Funds: Key R&D Plan of Shanxi Province (202102150401003); Central Government Guides Local Projects (YDZJSX2022 A018); Innovation and Entrepreneurship Training Program for College Students (20210078)
  • 摘要: 钛/铝层状复合板兼具了钛合金高强耐腐蚀和铝合金轻质、价格低廉的多重优势,在航空航天、汽车制造、水下装备等领域具有广泛的潜在应用前景。为探究Ti/Al层状复合构件的连接行为,采用真空电子束焊(EBW)对Ti/Al层状复合板进行焊接,对焊接接头的微观组织、界面行为及力学性能进行了研究。研究结果表明:相比于单面焊,先Al后Ti双面焊可以有效提高Ti/Al层状复合板焊接接头的力学性能,焊接接头界面处无明显缺陷,在焊接接头Ti/Al界面处存在明显的金属间化合物(IMCs)层,化合物的形成顺序分别为TiAl3、TiAl、TiAl2。其中,TiAl2是TiAl作为中间物经过一系列反应的产物。在保持Al层电子束流为43 mA不变条件下,随着Ti层焊接电子束流的增大,焊接接头的抗拉强度和延伸率均呈现先增大后减小的趋势,抗拉强度和延伸率最高可达304.6 MPa和10.4%,达到了母材强度的57%,焊接接头的断裂机制主要为在IMCs位置产生的脆性断裂。

     

  • 图  1  示意图:(a) 热压工艺流程;(b) 电子束焊接(EBW)设备原理;(c) 焊接方式

    TC4—Ti6Al4V; LMCs—Laminar composites

    Figure  1.  Schematic diagram: (a) Hot pressing process flow; (b) Principle of vacuum electron beam welding (EBW) equipment; (c) Welded types

    图  2  Type A焊接接头微观形貌: ((a), (c)) 60 mA;((b), (d)) 70 mA

    BM—Base metal; HAZ—Heat affected zone; FZ—Fusion zone

    Figure  2.  Microstructure of Type A welded joint: ((a), (c)) 60 mA; ((b), (d)) 70 mA

    图  3  Type B焊接接头微观组织形貌:(a) Ti/Al界面处;(b) Ti层FZ处;(c) Al层FZ处;(d) Al层HAZ和BM处

    Figure  3.  Microstructure of Type B welded joint: (a) Ti/Al interface; (b) Ti layer FZ; (c) Al layer FZ; (d) Al layer HAZ and BM

    图  4  Type C焊接接头成形示意图:((a)~(c)) 70 mA;((d)~(f)) 75 mA;((g)~(i)) 80 mA

    IMCS—Intermetallic compounds

    Figure  4.  Type C welding joint forming diagram: ((a)-(c)) 70 mA; ((d)-(f)) 75 mA; ((g)-(i)) 80 mA

    图  5  焊接接头成形示意图:(a) Type A;(b) Type B;(c) Type C

    Figure  5.  Welding joint forming diagram: (a) Type A; (b) Type B; (c) Type C

    图  6  焊接接头熔合区界面处EDS图谱:(a) 界面处SEM图像;(b) 面扫图;(c) Line 1线扫图;(d) Line 2线扫图;(e) 点扫图

    Figure  6.  EDS spectrum at the interface of fusion zone: (a) SEM image at the interface; (b) Map scanning; (c) Line scanning of Line 1; (d) Line scanning of Line 2; (e) Point scanning

    图  7  Type C焊接接头的XRD图谱

    Figure  7.  XRD patterns of Type C welded joint

    图  8  Type C焊接接头显微硬度:(a) 沿焊缝深度方向;(b) 垂直焊缝方向

    Figure  8.  Type C microhardness of welded joint: (a) Along the depth of the weld; (b) Vertical weld direction

    图  9  Type C焊接接头拉伸性能:(a) 应力-应变曲线;(b) 极限抗拉强度(UTS)、屈服强度(YS)和延伸率(EL)

    R—Radius

    Figure  9.  Type C tensile properties of welded joints: (a) Stress-strain curves; (b) Ultimate tensile strength (UTS), yield strength (YS) and elongation (EL)

    图  10  Type C焊接接头断口形貌:(a) 宏观图;(b) 断口EDS图谱;(c) Ti/Al界面处;(d) 图10(c)中(d)处的放大图;(e) 图10(c)EDS面扫图;(f) Ti层;((g), (h)) Al层

    Figure  10.  Type C fracture profile of welded joint: (a) Macrograph; (b) Fracture EDS; (c) Ti/Al interface; (d) Put a large area of (d) in Fig.10(c); (e) EDS scanning map of Fig.10(c); (f) Ti layer; ((g), (h)) Al layer

    表  1  TC4钛合金化学成分

    Table  1.   Chemical composition of TC4 titanium alloy wt%

    TiAlVFeOCNH
    Balance6.24.00.250.150.0980.010.004
    下载: 导出CSV

    表  2  6061铝合金化学成分

    Table  2.   Chemical composition of 6061 aluminum alloy wt%

    AlMgTiSiZnFeCuMnCr
    Balance1.050.10.620.180.410.20.120.17
    下载: 导出CSV

    表  3  EBW工艺参数

    Table  3.   EBW process parameters

    Electron
    beam
    current/mA
    Single-side welding
    (Type A)
    Double-side welding
    Type BType C
    Ti side60/70/8050/60/6570/75/80
    Al side40/4543/45
    下载: 导出CSV

    表  4  不同温度下Ti-Al IMCs的吉布斯自由能[19]

    Table  4.   Gibbs free energy of Ti-Al IMCs at different temperatures[19]

    IMCsGibbs free energy ΔGf
    TiAl3−40349.6+10.37T
    TiAl−37445.1+16.79T
    Ti3Al−29633.6+6.71T
    TiAl2−43858.4+11.02T
    Ti2Al5−40495.4+9.53T
    Note: T—Temperature.
    下载: 导出CSV
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  • 收稿日期:  2022-11-16
  • 修回日期:  2022-12-13
  • 录用日期:  2022-12-14
  • 网络出版日期:  2022-12-23
  • 刊出日期:  2023-11-01

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