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测量显微硬度是研究合金机械性能的最简单而又经济的方法之一。本文报导了对几个Al-Zn-Mg合金的试验结果以及对这些试验结果的解释。合金是用高纯材料熔制的。试验结果如下:(a)合金显微硬度相对于高纯铝显微硬度的增量可以写ΔHV=264(C_(Mg)—0.25C_(Zn)),式中C_(Mg)和C_(Zn)是合金固熔处理后淬火状态下Mg和C_(Zn)的浓度;(b)抗拉强度与显微硬度存在下面的近似关系:HV(?)3。△HV与室温下形成的GP区的平均半径和体积百分数有关。通过对塑性变形微观机构的研究,进一步证明了剪切机构对Al—Zn—Mg合金中GP区强化起主要作用。
Measuring microhardness is one of the simplest and most economical ways to study the mechanical properties of alloys. This paper reports on the experimental results of several Al-Zn-Mg alloys and their interpretation of these experimental results. Alloy is made of high purity materials. The test results are as follows: (a) ΔHV = 264 (C_ (Mg) -0.25C_ (Zn)) can be written in increments of the microhardness of the alloy relative to the microhardness of the high purity aluminum, ) Is the concentration of Mg and C_ (Zn) in the as-quenched alloy after solid solution treatment; (b) The approximate relationship between tensile strength and microhardness is as follows: HV (?) 3. △ HV is related to the average radius and volume percentage of GP zones formed at room temperature. Through the study of the microstructure of plastic deformation, it is further proved that the shear mechanism plays a major role in the GP area strengthening in Al-Zn-Mg alloy.