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首页> 外文会议>TMS annual meeting exhibition >Fatigue behavior of Al 6082-T4 and Al 7075-T73 after ball burnishing.
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Fatigue behavior of Al 6082-T4 and Al 7075-T73 after ball burnishing.

机译：球磨光后，Al 6082-T4和Al 7075-T73的疲劳行为。

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The effect of ball burnishing on the rotating beam fatigue strength of age-hardened 6082-T4 and 7075-T73 aluminum has been investigated. Deep rolled specimens were cyclically deformed at room temperature using push-pull stress controlled fatigue and compared to the electrically polished condition as a reference, Also Shot peened condition give better results compared to electrically polish. Optimization curve was produced for both SP and BB conditions, due to this optimization shot peened with Almen intensity of 0.2 mmA for both alloys was used. For ball burnishing (deep rolling) 40 bars was used for 6082-T4 and 75 bars for 7075-T73 by deep rolling tool HG13. The observed improvements were from about 45% for Al 6082-T4 while it was the double for Al 7075-T73 compared to electrically polish, while the improvement of fatigue for BB condition compared to SP was 5% for Al 6082-T4 and 28 % for Al 7075-T73. Data analysis shows that the fatigue behavior in these alloys affected by surface treatment. It was found that deep rolling can dramatically enhance the fatigue behavior of aluminum alloys as compared to the shot peening and polished condition due to near surface compressive residual stresses as well as work hardening states and increased hardness induced by mechanical surface treatment (deep rolling).
机译：研究了球磨光对时效的6082-T4和7075-T73铝的旋转梁疲劳强度的影响。深轧试样在室温下使用推拉应力控制的疲劳进行周期性变形，并与电抛光条件作为参考进行比较。与电抛光相比，喷丸处理条件也能提供更好的结果。由于使用了两种合金的Almen强度为0.2 mmA的喷丸优化处理，因此在SP和BB条件下均生成了优化曲线。对于球抛光（深轧），通过深轧工具HG13将60 bar-T4使用40巴，将7075-T73用于75-T73。 Al 6082-T4的观察到的改善约为45％，而Al 7075-T73的观察到的改善是电抛光的两倍，而BB条件下与SP相比，BB条件下的疲劳改善为Al 6082-T4的改善为28％。适用于Al 7075-T73。数据分析表明，这些合金的疲劳行为受到表面处理的影响。已发现，由于近表面压缩残余应力以及工作硬化状态和机械表面处理（深轧）引起的硬度提高，与喷丸处理和抛光条件相比，深轧可显着增强铝合金的疲劳性能。

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