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Friction welding of electron beam melted Ti-6Al-4V

机译：电子束熔化的Ti-6Al-4V的摩擦焊接

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摘要

Ti-6Al-4V samples produced by electron beam melting (EBM) are welded using solid-state friction welding (FW) process. The microstructure of the weld sample shows the presence of fine equiaxed alpha grains with irregular beta phase. Microstructural investigations reveal a pronounced change in the shape and size of the alpha phase in the weld metal as-compared to the base material along with the disappearance of columnar prior beta grains. Such variations in the microstructure significantly change the mechanical properties of the FW material. The hardness in the weld zone increases and a decrease of hardness is observed along the heat affected zone (HAZ) with respect to the base metal as expected. Similarly, the room temperature tensile tests show an improvement of ductility in the welded EBM samples. However, the yield and the ultimate strength show a marginal drop in the welded samples compared to the as-prepared EBM specimens. The present work demonstrates that solid-state FW process not only permits successful joining of additively manufactured materials, but also helps in improving their ductility.
机译：使用固态摩擦焊接（FW）工艺焊接通过电子束熔化（EBM）生产的Ti-6Al-4V样品。焊缝样品的微观结构表明存在细小的等轴α晶粒和不规则β相。显微组织研究表明，与母材相比，焊缝金属中α相的形状和尺寸发生了显着变化，同时柱状先有β晶粒消失了。微观结构的这种变化显着改变了FW材料的机械性能。如预期的那样，相对于母材，焊接区的硬度增加，并且沿着热影响区（HAZ）观察到硬度降低。同样，室温拉伸试验表明，焊接的EBM样品的延展性得到了改善。但是，与准备好的EBM试样相比，焊接试样的屈服强度和极限强度略有下降。目前的工作表明，固态FW工艺不仅可以成功地加入增材制造材料，而且还有助于提高其延展性。

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  • 来源
    《Materials Science and Engineering》 |2019年第22期|138045.1-138045.6|共6页
  • 作者

    Qin P. T.; Damodaram R.; Maity T.; Zhang W. W.; Yang C.; Wang Z.; Prashanth K. G.;

  • 作者单位

    South China Univ Technol, Guangdong Key Lab Proc & Forming Adv Metall Mat, Guangzhou 510640, Guangdong, Peoples R China|South China Univ Technol, Natl Engn Res Ctr Near Net Shape Forming Metall M, Guangzhou 510640, Guangdong, Peoples R China;

    SSN Coll Engn, Chennai, Tamil Nadu, India;

    Arizona State Univ, Sch Engn Matter Transport & Energy, Mat Sci & Engn, Tempe, AZ 85287 USA;

    South China Univ Technol, Guangdong Key Lab Proc & Forming Adv Metall Mat, Guangzhou 510640, Guangdong, Peoples R China|South China Univ Technol, Natl Engn Res Ctr Near Net Shape Forming Metall M, Guangzhou 510640, Guangdong, Peoples R China;

    South China Univ Technol, Guangdong Key Lab Proc & Forming Adv Metall Mat, Guangzhou 510640, Guangdong, Peoples R China|South China Univ Technol, Natl Engn Res Ctr Near Net Shape Forming Metall M, Guangzhou 510640, Guangdong, Peoples R China;

    South China Univ Technol, Guangdong Key Lab Proc & Forming Adv Metall Mat, Guangzhou 510640, Guangdong, Peoples R China|South China Univ Technol, Natl Engn Res Ctr Near Net Shape Forming Metall M, Guangzhou 510640, Guangdong, Peoples R China;

    Tallinn Univ Technol, Dept Mech & Ind Engn, Ehitajete Tee 5, EE-19086 Tallinn, Estonia|Austrian Acad Sci, Erich Schmid Inst Mat Sci, Jahnstr 12, A-8700 Leoben, Austria;

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  • 正文语种 eng
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  • 关键词

    Ti-6Al-4V alloy; Electron beam melting; Friction welding; Tensile property; Hardness;

    机译：Ti-6Al-4V合金;电子束熔化;摩擦焊;拉伸性能;硬度;

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