基于CoCrNi的中合金的微结构演变,强化和变形机制的研究,具有不同的化时间
Pu Zhang1, Chunjiang Zhao1,2, Ruirui Wang1
1School of Intelligent Manufacturing Industry, Shanxi University of Electronic Science and Technology, Linfen 041000, China.
Materials (Basel, Switzerland)
|March 14, 2026
概括
退火时间显著影响 (CoCrNi) 93.5 Al Ti 0.5 中等合金的微观结构和机械性能. 较长的化促进了再结晶和粒内沉,通过脱位剪切机制增强了强度.
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.
- 物理化学 物理化学
背景情况:
- 中等合金 (MEAs) 为高级应用提供可调节的性能.
- 了解处理参数对MEA微结构的影响对于属性优化至关重要.
- 多相MEA,就像研究的 (CoCrNi) 93.5 Al Ti 0.5 C,呈现复杂的微观结构进化路径.
研究的目的:
- 系统地研究火时间对 (CoCrNi) 93.5 Al Ti 0.5 中等合金的微观结构和机械性能的影响.
- 阐明在不同的回火条件下控制合金性能的强化机制.
- 通过回火提供对控制多相MEA微观结构的见解.
主要方法:
- 热,然后在900°C下10分钟和60分钟的时间火.
- 使用显微镜技术进行微结构性表征,以识别沉物 (M23C6,MC,γ) 并评估再结晶.
- 室温拉伸试验用于评估屈服强度和总延长.
- 定量加强分析以确定各种加强机制的贡献.
主要成果:
- 这两种回火时间都导致了具有M23C6,MC型碳化物和γ'相沉物的合金.
- 短时间 (10 分钟) 的化导致了低的再结晶,而较长时间 (60 分钟) 的化导致了部分再结晶和内粒度 γ' 沉.
- 在10分钟和60分钟的回火中,分别获得了1276 MPa和1202 MPa的产力强度,总延长率为26%和28%.
- 10分钟样本的强度主要是由脱位和粒边界的强化;60分钟样本显示了由γ'沉物造成的脱位剪切的额外贡献.
结论:
- 化时间是定制这种多相中合金的微观结构和机械性能的一个关键因素.
- 在延长化过程中形成的内颗粒性γ'沉物通过脱位剪切显著促进了强化.
- 平面滑动和堆叠断层形成是室温下的关键变形机制,确保工作硬化能力.
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