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Nanoparticle-enabled phase control for arc welding of unweldable aluminum alloy 7075

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Listed:
  • Maximilian Sokoluk

    (University of California)

  • Chezheng Cao

    (University of California)

  • Shuaihang Pan

    (University of California)

  • Xiaochun Li

    (University of California
    University of California)

Abstract

Lightweight materials are of paramount importance to reduce energy consumption and emissions in today’s society. For materials to qualify for widespread use in lightweight structural assembly, they must be weldable or joinable, which has been a long-standing issue for high strength aluminum alloys, such as 7075 (AA7075) due to their hot crack susceptibility during fusion welding. Here, we show that AA7075 can be safely arc welded without hot cracks by introducing nanoparticle-enabled phase control during welding. Joints welded with an AA7075 filler rod containing TiC nanoparticles not only exhibit fine globular grains and a modified secondary phase, both which intrinsically eliminate the materials hot crack susceptibility, but moreover show exceptional tensile strength in both as-welded and post-weld heat-treated conditions. This rather simple twist to the filler material of a fusion weld could be generally applied to a wide range of hot crack susceptible materials.

Suggested Citation

  • Maximilian Sokoluk & Chezheng Cao & Shuaihang Pan & Xiaochun Li, 2019. "Nanoparticle-enabled phase control for arc welding of unweldable aluminum alloy 7075," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-018-07989-y
    DOI: 10.1038/s41467-018-07989-y
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    Cited by:

    1. Yanan Hu & Shengchuan Wu & Yi Guo & Zhao Shen & Alexander M. Korsunsky & Yukuang Yu & Xu Zhang & Yanan Fu & Zhigang Che & Tiqiao Xiao & Sergio Lozano-Perez & Qingxi Yuan & Xiangli Zhong & Xiaoqin Zeng, 2022. "Inhibiting weld cracking in high-strength aluminium alloys," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    2. Jun Jin & Shaoning Geng & Leshi Shu & Ping Jiang & Xinyu Shao & Chu Han & Liangyuan Ren & Yuantai Li & Lu Yang & Xiangqi Wang, 2024. "High-strength and crack-free welding of 2024 aluminium alloy via Zr-core-Al-shell wire," Nature Communications, Nature, vol. 15(1), pages 1-12, December.

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