超细粒度高强度合金的增材制造
Duyao Zhang1, Dong Qiu1, Mark A Gibson1,2
1Centre for Additive Manufacturing, School of Engineering, RMIT University, Melbourne, Victoria, Australia.
Nature
|December 6, 2019
概括
研究人员为增材制造开发了新的铜合金. 这些合金克服了颗粒结构的问题,在没有特殊加工的情况下产生细粒,均颗粒和改进的机械性能.
科学领域:
- 材料科学
- 制造工程
背景情况:
- 增材制造 (三维打印) 提供了更少浪费的复杂形状.
- 通过增材制造生产的合金通常会由于高冷却速率而表现出不良的柱状颗粒,从而产生异型性质.
- 现有的方法难以有效地完善微结构.
研究的目的:
- 开发一种用于增材制造的合金,以克服实现等轴粒结构的挑战.
- 提高增材制造的部件的机械性能.
主要方法:
- 开发具有高制冷能力的铜合金.
- 利用基于激光的增材制造固有的高冷速率和热循环.
- 印刷样本的微观结构和机械特性.
主要成果:
- 在没有特殊的工艺控制的情况下实现完全等轴,细粒度的微观结构.
- 开发的合金在增材制造过程中取代了高热梯度的负面影响.
- 由于超细的状微观结构,显示出有前途的机械性能,包括高强度和均延长.
结论:
- 在增材制造中,铜合金为实现理想的微观结构提供了一种新的方法.
- 这种方法有效地减轻了柱状粒的形成,并提高了机械性能.
- 该方法可能适用于用于航空航天和生物医学的其他形合金系统.
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