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Reducing welding hot cracking of high-strength novel Al–Mg–Zn–Cu alloys based on the prediction of the T-shaped device
Science and Technology of Welding and Joining ( IF 3.3 ) Pub Date : 2020-03-25 , DOI: 10.1080/13621718.2020.1746035
Yanlin Pan 1, 2 , Di Zhang 1, 2 , Haoran Liu 1, 2 , Zhaorui Zhang 1, 2 , Hongxiang Li 1, 2 , Linzhong Zhuang 1, 2 , Jishan Zhang 1, 2
Affiliation  

ABSTRACT The higher hot cracking tendency during fusion welding in traditional high-strength 7000 series alloys has been an obstacle for its further application. In this study, the cracking susceptibility can be suppressed by fabricating Al–Mg–Zn–Cu alloys with Zn/Mg≤1 and Cu/Mg≤0.25 while simultaneously maintaining the high strength. A T-shaped device combined with non-equilibrium solidification is developed to simulate the solidification during fusion welding, and it is effective to predict the shrinkage load, temperature and solid fraction. The effect of solidification temperature range, the amount of eutectics at the terminal stage of solidification and the shrinkage load during solidification on the hot cracking susceptibility are discussed in detail.

中文翻译:

基于T形装置预测的高强度新型Al-Mg-Zn-Cu合金焊接热裂纹减少

摘要 传统高强度 7000 系列合金在熔焊过程中较高的热裂纹倾向已成为其进一步应用的障碍。在这项研究中,可以通过制造 Zn/Mg≤1 和 Cu/Mg≤0.25 的 Al-Mg-Zn-Cu 合金来抑制开裂敏感性,同时保持高强度。开发了一种结合非平衡凝固的T形装置来模拟熔焊过程中的凝固过程,可有效预测收缩载荷、温度和固含量。详细讨论了凝固温度范围、凝固末期共晶量和凝固过程中的收缩载荷对热裂敏感性的影响。
更新日期:2020-03-25
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