Experimental Investigation on the Aging Response, Hardness and Total Impact Energy Absorption of Sr-Modified Heat-Treatable Cast Automotive Aluminum Alloys
Experimental Investigation on the Aging Response, Hardness and Total Impact Energy Absorption of Sr-Modified Heat-Treatable Cast Automotive Aluminum Alloys
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DOI：
10.1007/s12666-014-0399-2
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发表时间：
2014-10-01
影响因子：
1.6
通讯作者：
Shabani, Mohsen Ostad
中科院分区：
文献类型：
--
作者：
Mazahery, Ali;Shabani, Mohsen Ostad
在这项研究中，除了关于未变质和锶变质的铸造汽车铝合金所吸收的能量的数据外，还使用了计算机辅助的仪表化夏比冲击试验来产生加载时间信息。用总能量讨论了不同合金元素和熔体工艺参数对合金冲击性能的影响。具体评估了合金化元素、锶变质和冷却速度的影响。铝合金在185A℃下的时效响应表明，在时效的前4小时，硬度上升，冲击韧性下降。冷却速度直接影响铸件中显微组织相的大小和分布，进而影响冲击韧性。
In this study, a computer-aided instrumented Charpy impact test was used to produce the load-time information in addition to data concerning the energy absorbed of unmodified and Sr-modified cast automotive Al alloys. The total energy was used to discuss the impact properties of the alloy with respect to the different alloying elements and melt processing parameters. Effects of alloying elements, Sr-modification, and cooling rate were specifically evaluated. Aging response of the Al alloys at 185 A degrees C indicated a rise in hardness and decline in impact toughness during the first 4 h of aging. The cooling rate is found to have a direct effect on the size and distribution of microstructural phases in a casting, and in turn, on the impact toughness as well.