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先进的-合金的接:可性,加工技术和粒度结构控制
Qi Li1, Qiman Wang2, Yangyang Xu1
1National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Materials (Basel, Switzerland)
|February 27, 2026
概括
- (Al-Li) 合金的接是困难的,因为独特的微观结构降低了性能. 本综述探讨了微观结构控制的策略,以改善这些轻质航空航天材料的接质量.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
- 航空航天工程 航空航天工程
背景情况:
- - (Al-Li) 合金为航空航天应用提供了理想的性能,如低密度和高刚度.
- 接Al-Li合金带来了挑战,原因是有害的微观结构的形成,例如等粒区 (EQZ) 和粗柱状粒.
- 这些微观结构特征会对机械性能产生负面影响,并增加接接头的裂纹易感性.
研究的目的:
- 为Al-Li合金及其接能力的演变提供全面的回顾.
- 系统地研究特征性接微结构 (EQZ,柱状粒) 的形成机制.
- 为了比较各种策略的微结构控制和谷物精炼在Al-Li合金接.
主要方法:
- 审查Al-Li合金和接技术的几代进步.
- 分析主要的接工艺:激光,弧形和混合.
- 检查微结构控制策略:填充器设计,脉冲电流,外部场辅助接.
- 专注于谷物炼机制:异质核化,树碎片化,从柱状到等状的过渡.
主要成果:
- 在Al-Li合金接中确定了独特的微结构特征,包括EQZ和粗柱状颗粒.
- 突出了与这些微观结构相关的机械性能退化和裂纹风险增加.
- 对比了不同微结构控制策略在提高接质量的有效性.
结论:
- 先进的微结构控制对于在Al-Li合金中实现高质量的接至关重要.
- 专注于谷物精炼的战略是克服接挑战的关键.
- 优化的接工艺和微结构控制对下一代轻量级航空航天结构具有前景.
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