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首页> 外文期刊>Materials Science and Engineering >Electrically assisted diffusion bonding of Ti_2AlNb alloy sheet using CP-Ti foil interlayer: Microstructural characterization and mechanical tests
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Electrically assisted diffusion bonding of Ti_2AlNb alloy sheet using CP-Ti foil interlayer: Microstructural characterization and mechanical tests

机译：CP-Ti箔夹层与Ti_2AlNb合金薄板的电辅助扩散结合：组织结构表征和力学性能测试

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摘要

This study presents an electrically assisted diffusion bonding (EADB) process as a variation of solid-state diffusion bonding to obtain a wider dissemination of this technique. This concept is an experimental adaptation inspired by the rapidly increasing Joule heat during welding that has already been placed into practice. EADB was studied for a Ti2AlNb alloy sheet using a commercially pure titanium (CP-Ti) foil interlayer. An in-house built experimental setup was assembled to implement the EADB concept. The nonuniform temperature profiles of the Ti2AlNb alloy sheets under different electric current densities were imaged for reference in the subsequent discussion. Common characterization techniques were used to observe the interfacial microstructures, and the shear property and surface Vickers hardness were tested to assess the joint quality. The results showed that bonding interfaces consisted of the interlayer zone and the transition zone, and the Ti2AlNb alloy sheets were completely bonded under high electric current densities in the central zone of the sheet. When the density was increased to 4.58 A/mm(2), the average room-temperature shear strength and Vickers hardness value reached the maximum values of 641 MPa and 493 HV, respectively.
机译：这项研究提出了一种电辅助扩散键合（EADB）工艺，作为固态扩散键合的一种变体，可以使该技术得到更广泛的传播。这个概念是实验性的适应，它受到焊接过程中焦耳热迅速增加的启发，现已付诸实践。对于使用商业纯钛（CP-Ti）箔夹层的Ti2AlNb合金板，研究了EADB。组装了一个内部实验装置以实施EADB概念。在不同的电流密度下，对Ti2AlNb合金薄板的非均匀温度分布进行了成像，以供后续讨论时参考。使用常用的表征技术观察界面微观结构，并测试剪切性能和表面维氏硬度以评估接头质量。结果表明，结合界面由中间层区和过渡区组成，Ti2AlNb合金薄板在高电流密度下被完全结合。当密度增加到4.58 A / mm（2）时，平均室温剪切强度和维氏硬度值分别达到641 MPa和493 HV的最大值。

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  • 来源
    《Materials Science and Engineering》 |2019年第28期|733-745|共13页
  • 作者

    Li Xiao; Wang Guofeng; Gu Yibin; Yang Jianlei;

  • 作者单位

    Harbin Inst Technol, Natl Key Lab Hot Precis Proc Met, Harbin 150006, Heilongjiang, Peoples R China;

    Harbin Inst Technol, Natl Key Lab Hot Precis Proc Met, Harbin 150006, Heilongjiang, Peoples R China;

    Harbin Inst Technol, Natl Key Lab Hot Precis Proc Met, Harbin 150006, Heilongjiang, Peoples R China;

    Harbin Inst Technol, Natl Key Lab Hot Precis Proc Met, Harbin 150006, Heilongjiang, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Ti2AlNb alloy; Diffusion bonding; Resistance heating; Joule heat;

    机译：Ti2AlNb合金扩散键合电阻加热焦耳热;

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