一种基于CoCrNi的中合金的异常强度-柔性组合,通过在热后的短/中期回火
Yongan Chen1,2, Dazhao Li1, Zhijie Yan1,2
1School of Materials Science and Engineering, North University of China, Taiyuan 030051, China.
Materials (Basel, Switzerland)
|October 16, 2024
概括
这项研究开发了具有优异强度和可塑性的中等合金,使用短的回火时间. 这些发现为优化合金特性和理解变形机制提供了洞察力.
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.
- 机械工程 机械工程
背景情况:
- 在工业应用中,开发强而柔软的合金对于需要增强结构可靠性的工业应用至关重要.
- 中等合金 (MEAs) 提供了一个有前途的材料类别,可以实现卓越的机械性能.
- 了解微观结构和变形机制之间的关系是设计先进合金的关键.
研究的目的:
- 为了生产 (CoCrNi) 93.5Al3Ti3C0.5 具有特殊强度-柔性组合的中合金.
- 研究火时间对合金微观结构和变形机制的影响.
- 为优化机械性能和理解高/中合金中的变形提供指导.
主要方法:
- 热,然后进行短 (3分钟) 和中 (30分钟) 的回火处理.
- 微观结构的表征,以识别间粒体和内粒体沉物 (MC,M23C6碳化物,L12阶段).
- 对变形的基结构进行分析,以确定主要的变形机制 (平面滑动,堆叠故障,结合).
主要成果:
- 这两种合金均表现出优异的强度-柔性组合.
- 在中期冷却样本中观察到高密度的内粒体L12沉物.
- 飞机滑动是主要的变形机制,受到堆叠断层能量,溶碳和L12沉物的影响.
- 由于堆叠故障能量较高和关键结合应力增加,在中期烧焦合金中抑制了结合.
结论:
- 短/中等回火时间有效地产生具有优越强度-延展性的MEAs.
- 内粒体L12沉物显著影响变形机制,特别是抑制结合.
- 该研究为设计高性能MEAs提供了基本的理解和实际指导.
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