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首页> 外文会议>International conference on aluminium alloys >EFFECT OF THE Zn/Mg RATIO ON MICROSTRUCTURE AND MECHANICAL PROPERTIES IN Al-Zn-Mg ALLOYS
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EFFECT OF THE Zn/Mg RATIO ON MICROSTRUCTURE AND MECHANICAL PROPERTIES IN Al-Zn-Mg ALLOYS

机译：Zn / Mg比对Al-Zn-Mg合金显微组织和力学性能的影响

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摘要

It is well know that the 7000 series Al-Zn-Mg alloy has good age hardening ability and high strength among commercial aluminum alloys. In this study, hardness measurement, tensile test, SEM and TEM observation have been performed in order to understand the effect of the Zn/Mg ratio on age hardening behaviour in Al-Zn-Mg alloys. It was seen from hardness measurement that the peak hardness increased with increasing amount of Zn and Mg. Tensile tests were performed for the samples of peak aged condition. It was seen that UTS increased with increasing amount of the Zn and Mg. The elongation decreased with increasing the amount of the Zn and Mg. Intregranular fracture was observed in alloys with low amount of Zn and Mg.Transgranular fracture was observed with high amount of Zn and Mg alloy. TEM observation was performed for peak aged samples. The size of precipitates became finer and the number density increased with increasing Zn and Mg contents.T' Phase and η_1 phase were observed in low Zn/Mg alloy. The η' phase was observed in high Zn/Mg alloy.
机译：众所周知，在商用铝合金中，7000系列Al-Zn-Mg合金具有良好的时效硬化能力和高强度。在这项研究中，进行了硬度测量，拉伸试验，SEM和TEM观察，以了解Zn / Mg比对Al-Zn-Mg合金时效硬化行为的影响。从硬度测量可以看出，峰值硬度随着Zn和Mg的增加而增加。对峰值时效条件的样品进行拉伸测试。可以看出，UTS随着锌和镁含量的增加而增加。随着Zn和Mg含量的增加，伸长率降低。锌和镁含量低的合金中观察到晶间断裂，锌和镁合金含量高的观察到晶间断裂。对峰值老化的样品进行TEM观察。随着Zn和Mg含量的增加，析出物的尺寸减小，数量密度增大。在低Zn / Mg合金中观察到T'相和η_1相。在高锌/镁合金中观察到η'相。

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