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首页> 外文期刊>Materials Science and Engineering >Annealing effect on microstructure and mechanical properties of Al/Ti/Al laminate sheets
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Annealing effect on microstructure and mechanical properties of Al/Ti/Al laminate sheets

机译：退火对Al / Ti / Al层压板组织和力学性能的影响

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摘要

Trimodal composites, consisting of ultrafine grains, coarse grains, and particles, are known to possess desirable combinations of physical and mechanical properties. In this paper, we report the fabrication of a sheet of trimodal material using roll bonding and annealing of an Al/Ti/Al laminate at 873 K for durations ranging from 6 h to 168 h. The Al/Ti/Al laminate was roll bonded from 625 μm (Al sheet thickness 300 μm, Ti foil thickness 25 μm) to 130 urn. The Ti layer was seen to break up and disperse in the aluminium matrix after rolling. It was found that when the annealing time was less than 12 h, there were residual voids at the interface between the TiAl_3 and Al layers, resulting in reduced ductility and strength of the composite sheet When the annealing time was increased to 24 h, there were no residual voids and the laminate became a kind of trimodal material, consisting of a combination of coarse-grained Al, ultrafine-grained Ti and TiAl_3 particles. This kind of laminate shows the highest yield strength and good ductility. With a further increase in the annealing time to 168 h, no residual pure Ti was seen in the laminate and the TiAl_3 particles were found to be distributed in the Al matrix close to the laminate surface, leading to lower strength and ductility. We also discuss the microstructure evolution and the deformation mechanism during tensile testing.
机译：由超细晶粒，粗晶粒和颗粒组成的三峰复合材料已知具有理想的物理和机械性能组合。在本文中，我们报告了在873 K下进行Al / Ti / Al层压板的辊压粘合和退火处理6到168 h的三峰材料薄片的制造过程。将Al / Ti / Al层压板从625μm（Al板厚度300μm，Ti箔厚度25μm）滚动粘合到130微米。观察到轧制后，Ti层破裂并分散在铝基质中。发现当退火时间少于12小时时，在TiAl_3和Al层之间的界面处存在残余空隙，导致复合片材的延展性和强度降低。当退火时间增加到24h时，存在没有残留的空隙，层压板成为一种三峰材料，由粗晶粒的Al，超细的Ti和TiAl_3颗粒组成。这种层压板显示出最高的屈服强度和良好的延展性。随着退火时间的进一步增加至168 h，在层压板中未发现残留的纯Ti，并且发现TiAl_3颗粒分布在层压板表面附近的Al基体中，导致强度和延展性降低。我们还讨论了拉伸试验过程中的微观结构演变和变形机理。

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  • 来源
    《Materials Science and Engineering》 |2016年第13期|195-204|共10页
  • 作者

    Hailiang Yu; Cheng Lu; A. Kiet Tieu; Huijun Li; Ajit Godbole; Charlie Kong;

  • 作者单位

    School of Mechanical, Materials & Mechatronics Engineering, University of Wollongong, NSW 2500, Australia;

    School of Mechanical, Materials & Mechatronics Engineering, University of Wollongong, NSW 2500, Australia;

    School of Mechanical, Materials & Mechatronics Engineering, University of Wollongong, NSW 2500, Australia;

    School of Mechanical, Materials & Mechatronics Engineering, University of Wollongong, NSW 2500, Australia;

    School of Mechanical, Materials & Mechatronics Engineering, University of Wollongong, NSW 2500, Australia;

    Electron Microscope Unit, University of New South Wales, Sydney, NSW 2052, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Trimodal materials; Laminate; Composite sheets; Diffusion bonding; Annealing; Rolling;

    机译：三峰材料;层压板复合板;扩散键合;退火;滚动;

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