Modeling the strengthening response to aging process of heat-treatable aluminum alloys containing plate/disc- or rod/needle-shaped precipitates
Modeling the strengthening response to aging process of heat-treatable aluminum alloys containing plate/disc- or rod/needle-shaped precipitates
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DOI：
10.1016/s0921-5093(02)00398-2
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发表时间：
2003-03-15
期刊：
影响因子：
6.4
通讯作者：
Chen, KH
中科院分区：
文献类型：
--
作者：
Liu, G;Zhang, GJ;Chen, KH
针对含有板状或棒状/针状析出相的可热处理铝合金，对已有的模型进行了修正，建立了合金屈服强度与析出相尺寸、体积分数、时效温度、时效时间以及合金成分之间的定量关系，并将析出相的强化与形核、长大和粗化的整个演化过程耦合起来，的沉淀物。结果表明，该模型对一系列Al-Cu二元合金、6061合金和Al-Zn-Mg合金的时效屈服强度都有较好的预测效果。实验结果表明，该模型适用于Al-Cu-Mg合金和Al-Mg-Si合金析出相的时效强化。此外，还详细讨论了时效工艺参数和合金成分对析出相长径比的影响及其强化效应。(C)出版社：Elsevier Science B. V.
For the heat-treatable aluminum alloys containing plate or rod/needle-shaped precipitates, a previous model was modified to present quantitative relationships between the yield strengths of the alloys and the sizes, volume percentages of precipitates, related to aging temperature and aging time as well as alloy compositions, while the strengthening of the precipitates was coupled with the whole evolution process, i.e. nucleation, growth and coarsening, of the precipitates. It was found that the aging yield strengths have been well predicted by the model for a series of aged Al-Cu binary alloys, 6061 alloys and Al-Zn-Mg alloys. It was also experimentally proved that the model was suitable to evaluate the aging strengthening of the precipitates for an Al-Cu-Mg alloy and an Al-Mg-Si alloy. Furthermore, a detailed discussion has been made to the variation of aspect ratio of precipitates, relative to its strengthening response, with aging parameters and alloy compositions. (C) 2002 Published by Elsevier Science B.V.