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添加对CoCrNi中等度合金中的微结构,相组合和性能的影响

Hui Chang^1,2, Shengfang Wang^1,2, Zhouzhu Mao^1,2

¹Institute of Applied Mechanics, College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China.

Materials (Basel, Switzerland)

|June 27, 2024

概括

将 (Si) 添加到--中等合金 (MEAs) 中,通过沉增强强度和高温硬度. 然而,过量的Si通过改变磨损机制来降低耐磨性.

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.
合金设计设计合金设计

背景情况:

-- (CoCrNi) 中等合金 (MEAs) 以其机械性能而闻名.
了解合金元素对MEA微观结构和特性的影响,对于开发先进材料至关重要.

研究的目的:

研究 (Si) 添加对CoCrNi MEAs的微观结构和特性的影响.
阐明含量,相位演变和机械性能之间的关系.

主要方法:

对具有不同Si含量的CrCoNiSixMEAs进行系统的研究 (x).
微结构演变的分析,包括相位过渡 (FCC到FCC+σ).
评估机械性能,如强度,硬度,应变硬化和耐磨性.

主要成果:

对于x < 0.3,CrCoNiSix MEAs保持单面中心立方 (FCC) 阶段,表现出固体溶液强化.
过渡到FCC+σ阶段结构发生在x = 0.4时,随着σ阶段分数和微观结构演变的增加.
σ沉通过Orowan机制增强强度,硬度 (包括在高温下),以及应变硬化.
高 σ 阶段含量降低了耐磨性,这是由于从磨料转向粘合剂的磨损造成的.

结论:

添加显著影响了CoCrNiMEAs的相稳定性和机械行为.
由 σ 沉驱动的 Orowan 机制是增强强度的关键.
优化Si含量是必要的,以平衡这些合金中的强度和耐磨性.

关键词:

硬度硬度硬度硬度机械性能机械性能机械性能中等的合金.微观结构就是微观结构.耐磨性耐磨性耐磨性耐磨性

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