审查控制AM钢的裂纹增长的参数及其对有限寿命AM和CSAM部件的影响
Rhys Jones1,2, Andrew Ang1, Nam Phan3
1ARC Industrial Transformation Training Centre on Surface Engineering for Advanced Materials, School of Engineering, Swinburne University of Technology, John Street, Hawthorn, VIC 3122, Australia.
Materials (Basel, Switzerland)
|January 28, 2026
概括
本研究回顾了增材制造钢的裂纹生长,发现疲劳值和周期性性变化捕捉了建筑过程和R比对裂纹生长率的影响. 建议在AM和CSAM材料中对ΔK和Δκ的裂纹生长率进行绘图.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 断裂力学 断裂力学 断裂力学
背景情况:
- 增材制造 (AM) 和冷喷涂增材制造 (CSAM) 提供独特的材料特性,但在预测疲劳行为方面存在挑战.
- 在不同的AM/CSAM材料和加工参数中观察到裂纹生长曲线的变化.
- 了解断裂力学参数对于AM/CSAM组件的可靠实施至关重要,特别是那些寿命有限的组件.
研究的目的:
- 审查和分析影响AM和CSAM钢的裂纹生长变异性的断裂力学参数.
- 研究不同建筑工艺和R比对应力强度因子范围 (ΔK) 和裂生长率 (da/dN) 之间的关系的影响.
- 评估施瓦尔贝裂驱动力 (Δκ) 在对AM和CSAM材料的裂生长行为进行表征方面的有效性.
主要方法:
- 审查42个实验测试,涵盖各种AM和CSAM钢,包括316L钢.
- 对裂纹生长率 (da/dN) 数据与应力强度因子范围 (ΔK) 的分析.
- 使用施瓦尔贝裂驱动力 (Δκ) 作为替代参数评估裂生长行为.
主要成果:
- 建筑工艺和R比对 ΔK 与 da/dN 曲线的影响可以通过在 Δκ 框架内调整疲劳值和明显周期性性来近似估计.
- 经验证据表明,在AM和CSAM材料中,对ΔK和Δκ进行da/dN绘图是建议的.
- 在AM和CSAM钢中观察到类似的da/dN与Δκ曲线,支持其他AM合金 (Ti-6Al-4V,Inconel 718,Inconel 625,Scalmalloy®) 和CSAM纯金属的先前发现.
结论:
- 疲劳值和周期性性是特征在AM和CSAM材料中裂纹生长的关键参数.
- 利用 ΔK 和 Δκ 来绘制裂纹生长数据,可以更全面地了解材料的行为.
- 这些发现对建筑工艺的选择和寿命有限的AM部件的认证有重大影响,特别是与断裂性和操作要求相结合时.
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