增强塑料稳定性:通过增材制造制造的Al6xxx合金实现高性能
Zhiheng Hu1, Shubo Gao1,2, Jakub Mikula3
1Singapore Institute of Manufacturing Technology (SIMTech), Agency for Science, Technology and Research (A*STAR), 5 Cleantech Loop, #01-01 CleanTech Two Block B, Singapore, 636732, Republic of Singapore.
Advanced materials (Deerfield Beach, Fla.)
|March 15, 2024
概括
具有异质微观结构的Al6xxx合金的增材制造提高了性能. T6热处理提高了塑料的稳定性,增加了强度和导热性,同时保持了柔性.
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.
- 制造业 工程 制造工程
背景情况:
- 与传统方法相比,增材制造 (AM) 能够实现新型材料微观结构.
- (Al) 合金在汽车和航空航天领域至关重要,AM提供制造优势.
- 在AM合金中的异质微结构可能会导致塑料不稳定性和裂等挑战.
研究的目的:
- 研究添加制造的Al6xxx合金中的Lüders带的演变和缓解.
- 通过解决塑料不稳定性来提高AM Al6xxx合金的性能.
- 为了在异质的AM合金中实现更好的强度-柔性权衡.
主要方法:
- 使用核化剂进行增材制造,制造Al6xxx合金.
- 引入超细粒度以诱导异质性并研究卢德斯带形成.
- 应用T6热处理来修改微观结构并评估塑料的稳定性.
主要成果:
- 由核化剂诱导的异质微观结构导致了Lüders带和降低的延展性.
- 在T6热处理过程中,局部Lüders压力从10.0%降低到6.2%,从而提高了塑料的稳定性.
- 谷物生长和粗谷物区域的扩大消除了局部和宏观的卢德斯菌株之间的不匹配,增加了强度和导热性.
结论:
- 由Lüders带证明的塑料不稳定性是异质AM合金中的关键因素.
- T6热处理是改善塑料稳定性和强度-柔性平衡的有效策略.
- 控制微观结构异质性是优化增材制造合金性能的关键.
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