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Updated: Sep 10, 2025

Determining the Mechanical Strength of Ultra-Fine-Grained Metals

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微观结构和高循环疲劳断裂特征的WC增强基激光涂层

Sha Wu^1,2, Wenjun Zhang³, Zenghua Liu²

¹College of Information and Intelligence Engineering, Zhejiang Wanli University, Ningbo, China.

Annals of the New York Academy of Sciences

|August 27, 2025

概括

激光覆盖可以修复飞机发动机部件, 将碳化 (WC) 添加到Ni60A合金中,通过改变微观结构和阻碍位,提高了耐疲劳性.

科学领域:

材料科学
机械工程
表面工程

背景情况:

由于高温和循环负荷,飞机发动机组件面临疲劳故障.
激光覆盖 (LC) 提供可持续的维修,但可能会引入影响性能的缺陷.
在LC中常见的是Ni60A合金,碳化物 (WC) 增强了耐磨性和耐疲劳性.

研究的目的:

研究Ni60A/25%WC激光涂层的高循环疲劳 (HCF) 行为.
了解WC粒子大小,分布和微观结构对疲劳性能的影响.
在LC修复的部件中阐明疲劳骨折机制.

主要方法:

在室温下对Ni60A/25%WC涂层进行拉伸和HCF测试.
生成S-N曲线以评估疲劳寿命.
断裂表面分析和能量分散光谱 (EDS) 检查微观结构和元素组成.

主要成果:

卫生间颗粒的形态和分布显著影响了耐疲劳性.
微结构分析揭示了WC/W₂C阶段在机械性能中的作用.
确定了疲劳裂的发起和传播机制.

结论:

对于优化激光覆盖Ni60A涂层的疲劳性能,WC颗粒的特性至关重要.
了解这些关系可以为关键组件改进LC修复策略.
这项研究提供了先进修复技术中疲劳失效机制的基础见解.

关键词:

一个WC 疲劳性能高周期疲劳激光覆盖拉力性能

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Fatigue

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