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首页> 外文期刊>International Journal of Fatigue >Crack initiation behavior and fatigue performance up to very-high-cycle regime of AlSilOMg fabricated by selective laser melting with two powder sizes
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Crack initiation behavior and fatigue performance up to very-high-cycle regime of AlSilOMg fabricated by selective laser melting with two powder sizes

机译:通过两种粉末尺寸的选择性激光熔化制造的山里黄抗性的裂缝启动行为和疲劳性能。

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摘要

The high-cycle and very-high-cycle fatigue (VHCF) behavior of AlSilOMg specimens manufactured by selective laser melting with different printing powder sizes was investigated. The specimens with 20 μm powder size contained more defects than those with 50 μm powder size, and the latter have a higher fatigue property than the former. Unmelted powders were detected as the main source of crack initiation. The specimens printed with 50 μm powder size are more likely to feature subsurface crack initiation in the VHCF regime. Five different types of crack initiation modes were identified, and the fatigue strength was assessed by statistical model.
机译:研究了通过选择性激光熔化与不同印刷粉末尺寸制造的Alsilomg样品的高循环和非常高循环疲劳(VHCF)行为。具有20μm的粉末尺寸的标本含有比具有50μm的粉末尺寸的缺陷,并且后者具有比前者更高的疲劳性能。未检测未熔化的粉末作为裂纹引发的主要来源。印有50μm的粉末尺寸的样品更可能在VHCF制度中具有地下裂纹启动。鉴定了五种不同类型的裂缝引发模式,通过统计模型评估疲劳强度。

著录项

  • 来源
    《International Journal of Fatigue》 |2021年第2期|106013.1-106013.12|共12页
  • 作者单位

    State Key Laboratory of Nonlinear Mechanics (LNM) Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China School of Engineering Science University of Chinese Academy of Sciences Beijing 1 00049 China;

    State Key Laboratory of Nonlinear Mechanics (LNM) Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China School of Engineering Science University of Chinese Academy of Sciences Beijing 1 00049 China;

    Department of Mechanical and Aerospace Engineering Politecnico di Torino 10129 Turin Italy;

    Department of Mechanical and Aerospace Engineering Politecnico di Torino 10129 Turin Italy;

    Department of Mechanical and Industrial Engineering Norwegian University of Science and Technology (NTNU) Richard Birkelands vei 2b 7491 Trondheim Norway;

    State Key Laboratory of Nonlinear Mechanics (LNM) Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China School of Engineering Science University of Chinese Academy of Sciences Beijing 1 00049 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Selective laser melting; AlSilOMg; VHCF; Defects; Crack initiation;

    机译:选择性激光熔化;alsilomg;VHCF;缺陷;裂缝启动;

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