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首页> 外文期刊>Materials Science and Engineering >Improved solution treatment for an as-rolled Al-Zn-Mg-Cu alloy. Part II. Microstructure and mechanical properties
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Improved solution treatment for an as-rolled Al-Zn-Mg-Cu alloy. Part II. Microstructure and mechanical properties

机译：对轧制的Al-Zn-Mg-Cu合金进行改进的固溶处理。第二部分显微组织和力学性能

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摘要

In this work, improved solution treatments and their effects on the microstructure and mechanical properties of as-rolled Al-6.22Zn-2.11 Mg-2.39Cu alloy have been investigated. By exploring the dissolution process of soluble constituent particles and monitoring changes in the grain structure, a solution treatment sequence with a good balance between a minimum volume fraction of remaining constituents and a partially recrystallised grain structure has been obtained. The results indicate that MgZn_2 (η) particles can be completely dissolved after holding at 475℃ for only 5 min, whereas the dissolution of Al_2CuMg (S) particles is relatively difficult and their complete dissolution requires a stepped solution treatment. By conducting a final solution treatment step at an increased temperature of 495℃, all the S-phase particles can be dissolved, whereas the recrystallised fraction can still be controlled to be less than 50%. After retrogression and re-ageing (RRA), samples subjected to a final-stage solution treatment at 495℃ have a relatively higher volume fraction of η' and η precipitates and can therefore have better mechanical properties.
机译：在这项工作中，研究了改进的固溶处理及其对轧制Al-6.22Zn-2.11 Mg-2.39Cu合金的组织和力学性能的影响。通过研究可溶性成分颗粒的溶解过程并监测晶粒结构的变化，获得了在残留成分的最小体积分数与部分重结晶晶粒结构之间具有良好平衡的固溶处理顺序。结果表明，MgZn_2（η）粒子在475℃下保持5 min即可完全溶解，而Al_2CuMg（S）粒子的溶解比较困难，其完全溶解需要逐步的固溶处理。通过在495℃升高的温度下进行最终的固溶处理步骤，可以溶解所有S相颗粒，而重结晶分数仍可以控制在50％以下。回归和再老化（RRA）后，在495℃下进行了最后阶段固溶处理的样品具有相对较高的η'体积分数和η析出物，因此可以具有更好的机械性能。

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  • 来源
    《Materials Science and Engineering》 |2012年第1期|p.244-252|共9页
  • 作者

    D.K. Xu; P.A.Rometsch; N. Birbilis;

  • 作者单位

    ARC Centre of Excellence for Design in Light Metals, Department of Materials Engineering, Monash University, VIC 3800, A Australia,State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, 62 Wencui Road, Shenyang 110016, China;

    ARC Centre of Excellence for Design in Light Metals, Department of Materials Engineering, Monash University, VIC 3800, A Australia;

    ARC Centre of Excellence for Design in Light Metals, Department of Materials Engineering, Monash University, VIC 3800, A Australia;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    solution treatment; constituent particle; dissolution kinetics; recrystallisation; AA7150;

    机译：固溶处理;组成粒子溶解动力学;重结晶AA7150;

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