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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >The effects of laser peening on high-cycle fatigue in 7085-T7651 aluminum alloy
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The effects of laser peening on high-cycle fatigue in 7085-T7651 aluminum alloy

机译：激光喷丸对7085-T7651铝合金高周疲劳的影响

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摘要

This study reports on the high-cycle fatigue performance of 7085-T7651 aluminum treated with combinations of laser peening and anodization. Stress-life fatigue data were generated in a high humidity environment using smooth (K_t = 1) specimens tested at a stress ratio R = 0.1 and a range of maximum stress. Tests were performed in the as-machined (untreated), anodized, laser peened, and laser peened then anodized conditions. The results show that laser-peened specimens exhibited significantly improved fatigue performance, with non-anodized specimens having a factor of 5-14 improvement in fatigue life (depending on stress level) and anodized specimens having a factor of 8-9 improvement in fatigue life. Without laser peening, anodized specimens had reduced fatigue life at all stress levels. With laser peening, anodized and non-anodized specimens had similar lives at high stress (life ＜ 10~5 cycles) but anodized specimens had shorter lives at low stress. In addition to the fatigue results, surface quality and fatigue initiation locations were evaluated and compared between the specimen conditions.
机译：这项研究报告了7085-T7651铝经激光喷丸处理和阳极氧化处理后的高周疲劳性能。应力寿命疲劳数据是在高湿度环境下使用光滑的（K_t = 1）试样在应力比R = 0.1和最大应力范围内测试得出的。在已加工（未经处理），阳极氧化，激光喷丸，然后激光喷丸然后阳极氧化的条件下进行测试。结果表明，经激光喷丸处理的样品表现出显着改善的疲劳性能，其中非阳极氧化的样品的疲劳寿命提高了5-14倍（取决于应力水平），而阳极氧化的样品的疲劳寿命提高了8-9倍。 。如果不进行激光喷丸处理，则阳极氧化的样品在所有应力水平下的疲劳寿命都会降低。进行激光喷丸处理后，阳极氧化和未阳极氧化的试样在高应力下的寿命相似（寿命＜10〜5个循环），而在低应力下的阳极氧化试样的寿命较短。除了疲劳结果，还评估了表面质量和疲劳引发位置，并在试样条件之间进行了比较。

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