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首页> 外文期刊>Journal of the Chinese Institute of Engineers >Effect of pre-straining and natural aging on precipitation behavior of aluminum alloy 6022
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Effect of pre-straining and natural aging on precipitation behavior of aluminum alloy 6022

机译：预应变和自然时效对铝合金6022析出行为的影响

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摘要

The influences of natural aging and pre-straining on the age-hardening response of AA6022 (Al-0.6 Mg-1.0Si) has been investigated in this study. The precipitation behaviors of samples of the alloy were analyzed using differential scanning calorimetry (DSC), as well as by measuring the electrical conductivity, and confirmed by microstructure observation using transmission electron microscopy (TEM). Tensile tests and microhardness measurements were performed to determine the mechanical properties of the samples. With an increase in the natural aging time at room temperature (RT), more GP zones (1) are formed, which leads to a lower peak microhardness in artificially aged specimens. The initial decrease in the microhardness of the naturally aged sample during artificial aging could be attributed to the reversion of GP zones (1) that formed during natural aging. Pre-straining has a marked influence on the subsequent precipitation process of the AA6022, and indicates that suitable pre-straining can significantly reduce the detrimental effects of natural aging on the artificial aging kinetics.
机译：在这项研究中，研究了自然时效和预应变对AA6022（Al-0.6 Mg-1.0Si）的时效硬化响应的影响。使用差示扫描量热法（DSC）以及通过测量电导率来分析合金样品的沉淀行为，并通过使用透射电子显微镜（TEM）的显微组织观察来证实。进行拉伸测试和显微硬度测量以确定样品的机械性能。随着室温（RT）下自然时效时间的增加，会形成更多的GP区域（1），从而导致人工时效样品的峰值显微硬度降低。在人工时效过程中，自然时效样品的显微硬度最初降低可能归因于自然时效过程中形成的GP区域（1）的还原。预应变对AA6022的后续沉淀过程具有显着影响，并表明适当的预应变可以显着降低自然老化对人工老化动力学的不利影响。

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