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首页> 外文期刊>Materials Science and Engineering >One-step consolidation and precipitation hardening of an ultrafine-grained Al-Zn-Mg alloy powder by Spark Plasma Sintering
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One-step consolidation and precipitation hardening of an ultrafine-grained Al-Zn-Mg alloy powder by Spark Plasma Sintering

机译：放电等离子烧结超细晶Al-Zn-Mg合金粉的一步固结和沉淀硬化

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摘要

In the present work, ultrafine-grained Al-Zn-Mg alloy produced by high energy ball milling and Spark Plasma Sintering was synthesized. The Hall-Petch strengthening due to grain refinement (about 150 nm) is preserved and the Orowan's effect attributed to the presence of the hardening phase η' is obtained in a single-step during the sintering. Maximum compression stresses as high as 736 MPa and 830 MPa were reached in quasistatic and dynamic conditions respectively. Hardness was increased from 124 HV5 for a consolidated coarse grained material to 196 HV for a consolidated ultrafine-grained (UFG) material. The mechanical properties obtained in this study were all superior to the ones of the reference AA7020-T651.
机译：在本工作中，合成了通过高能球磨和放电等离子烧结生产的超细晶粒Al-Zn-Mg合金。保留了由于晶粒细化（约150 nm）而产生的Hall-Petch强化，并且在烧结过程中只需一步即可获得归因于硬化相η'的Orowan效应。在准静态和动态条件下，最大压缩应力分别达到736 MPa和830 MPa。硬度从固结粗粒材料的124 HV5增加到固结超细颗粒（UFG）材料的196 HV。在这项研究中获得的机械性能均优于参考AA7020-T651。

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  • 来源
    《Materials Science and Engineering》 |2017年第8期|227-234|共8页
  • 作者

    H. Queudet; S. Lemonnier; E. Barraud; J. Guyon; J. Ghanbaja; N. Allain; E. Gaffet;

  • 作者单位

    French-German research Institute of Saint-Louis, France,Laboratory of Microstructure Studies and Mechanics of Materials - UMR CNRS 7239, Universite de Lorraine, Metz, France,Institut Jean Lamour - UMR 7198 CNRS - Universite de Lorraine, Nancy, France;

    French-German research Institute of Saint-Louis, France;

    French-German research Institute of Saint-Louis, France;

    Laboratory of Microstructure Studies and Mechanics of Materials - UMR CNRS 7239, Universite de Lorraine, Metz, France;

    Institut Jean Lamour - UMR 7198 CNRS - Universite de Lorraine, Nancy, France;

    Laboratory of Microstructure Studies and Mechanics of Materials - UMR CNRS 7239, Universite de Lorraine, Metz, France;

    French-German research Institute of Saint-Louis, France;

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  • 正文语种 eng
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  • 关键词

    Strengthening mechanism; Al alloy; Ultrafine grained materials; Spark Plasma Sintering; Mechanical properties; High energy ball milling;

    机译：加强机制;铝合金超细颗粒材料;火花等离子烧结;机械性能高能球磨;

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