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A Comparison of Aging Models on Alloy 6061

机译:6061合金的时效模型比较

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摘要

Recent state-variable models for aging are evaluated using Nock's data for alloy 6061.rnThe model of Shercliff and Ashby misfits slope of strength with aging time, both underagedrnand overaged. Neither misfit is improved by subsequently proposed changes to strengthrnlaw or to evolution law for particle radius. A nucleation-growth-coarsening model largelyrnremoves misfit underaged, but concurrently peak strength is modelled as transition fromrnnucleation to coarsening, rather than transition from shearing to bypassing. The misfitrnoveraged is attributed to lack of model for successor beta-prime particle. None of thernmodels include the predecessor clusters, which show in Nock's data.
机译:使用Nock的6061合金数据评估了最新的状态变量老化模型。Shercliff和Ashby的模型随着老化时间的增加而使强度的斜率不合时宜,即老化不足和过度老化。随后提出的对强度定律或对粒子半径的演化定律的更改都不会改善失配。形核-生长-粗化模型主要消除了老化不足的失配,但同时将峰强度建模为从形核到粗化的过渡,而不是从剪切到旁路的过渡。失配的原因是缺乏后继β素粒子的模型。这些模型均不包含在Nock数据中显示的前一簇。

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