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首页> 外文会议>International conference on high performance and optimum design of structures and materials >Microstructural and mechanical characterization of magnesium based alloy MA14 (ZK60 A): evolution under deformation and heat treatment
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Microstructural and mechanical characterization of magnesium based alloy MA14 (ZK60 A): evolution under deformation and heat treatment

机译：基于镁合金MA14（ZK60 A）的微观结构和力学表征：变形和热处理的演变

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The interest in magnesium based alloys as structural metal material is due to their low weight, good mechanical and technological properties, high special strength, etc. So magnesium base alloys can compete successfully in physical and mechanical characteristics with other light structural materials especially in the fields where decrease in the mass is of primary significance. The aim of the present work was to study the influence of phase and structural changes in the main properties of commercial magnesium based alloy MA14 (ZK60 A) under deformation and heat treatment parameters. The microstructure was investigated with the use of an optical inverted microscope. The phase composition was investigated by chemical phase analysis with an X-ray analysis of each insulated phase. It is found, that there are primary phases Mg_2Zn_3, ZrZn_2 and Zr_3Zn_2. Sometimes phases ω-ZrH_2, δ-ZrH, Zr_2Al can be present in phase composition. All the phases are the hardening ones. The phase quantity, size, morphology correlate with the condition of the magnesium alloy so traditional deformation and heat treatment has not had much influence on qualitative phase composition; only on the phase and grain size. Now it is stated that the most effective processing for receiving the elevated alloy properties is hydrostatic extrusion. The final operation of hydrostatic extrusion of magnesium alloy semi products causes the well-disposed structure and phase changes. Thus the high strength properties of the cheap commercial magnesium alloy MA14 are obtained: tensile strength is more than 380 MPa; tensile yield strength is more than 340 MPa.
机译：镁基合金作为结构金属材料的兴趣是由于它们的重量低，机械和技术性能良好，高特殊强度等。因此，镁基金合金可以在物理和机械特性中与其他光结构材料成功竞争，特别是在田地中在质量下降的情况下具有主要意义。本作本作的目的是研究变形和热处理参数在商业镁基合金MA14（ZK60a）的主要性质的相位和结构变化的影响。使用光学倒置显微镜研究了微观结构。通过化学阶段分析研究了相结合物，具有每个绝缘相的X射线分析。找到，存在主要阶段MG_2ZN_3，ZRZN_2和ZR_3ZN_2。有时相位ω-zrh_2，δ-zrh，zr_2al可以存在于相位组合物中。所有阶段都是硬化的。相量，尺寸，形态与镁合金的条件相关，因此传统变形和热处理对定性相组合物没有太大影响;只有阶段和晶粒尺寸。现在表示，用于接受升高的合金性质的最有效处理是静压挤出。镁合金半产品静水挤出的最终操作导致结构良好的结构和相变。因此，获得廉价的商品镁合金MA14的高强度特性：拉伸强度大于380MPa;拉伸屈服强度大于340MPa。

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