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首页> 外文期刊>Scripta materialia >Estimation of compression flow stress from post-deformation hardness in Al-Mg alloys.
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Estimation of compression flow stress from post-deformation hardness in Al-Mg alloys.

机译：根据铝镁合金变形后的硬度估算压缩流动应力。

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摘要

While the mechanical deformation mechanisms ofmaterials based on constitutive laws and dislocation theories areextensively investigated, less attention has been paid to thecorrelation between the flow stress and the post-deformationhardness. An attempt has been made to establish such arelationship by incorporating thc compression tests at differenttemperatures and strain rates in 0.5Mg, 1.0Mg and 3.0Mg alloysand the hardness measurements on the deformed samples. Itseems that the post-deformation hardness has an intrinsicconnection with temperature and the strain rate, and hence with theZ parameter. Meanwhile, like dislocation density, the post-deformation hardness is proportional to strain. These featuresmake the post-deformation hardness act as a microstructuralvariable in delineating the flow stress evolution duringdeformation. A simple correlation has been established, throughwhich the true flow stress at certain true strain level ( epsilon )during hot compression deformation of three Al-Mg alloys atdifferent conditions ( epsilon and T) can be predicted by relating tothe post-deformation Vickers hardness.
机译：在广泛研究基于本构律和位错理论的材料的机械变形机理的同时，很少关注流变应力与变形后硬度之间的关系。已经尝试通过在0.5Mg，1.0Mg和3.0Mg合金中在不同温度和应变速率下进行压缩试验并在变形样品上进行硬度测量来建立这种关系。似乎变形后硬度与温度和应变率，因此与Z参数有着内在的联系。同时，像位错密度一样，变形后硬度与应变成正比。这些特征使得变形后的硬度在描述变形过程中的流变应力时起微观结构的作用。建立了一种简单的相关性，通过与变形后的维氏硬度有关，可以预测三种Al-Mg合金在不同条件下（ε和T）的热压缩变形过程中，在一定真实应变水平（ε）下的真实流动应力。

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