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首页> 外文期刊>Journal of Materials Research >The formation of α + β microstructure in as-fabricated selective laser melting of Ti-6Al-4V
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The formation of α + β microstructure in as-fabricated selective laser melting of Ti-6Al-4V

机译：Ti-6Al-4V的选择性激光熔化中α+β微观结构的形成

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摘要

Ti-6Al-4V parts made by the additive manufacturing (AM) technique selective laser melting (SLM) generally show poor ductility due to their fine martensitic microstructure. This study was designed to assess whether a more suitable microstructure can be obtained when long laser/material interaction times are used. As-fabricated components with an α +β microstructure were produced and characterized with various microscopy techniques. The microstructural evolution was discussed in relation to the build platform temperature, the cyclic reheating, and the thermal stresses that developed during the process. The hardness of the samples was also evaluated and discussed. The hardness varied in relation to the different microstructure morphologies observed in the samples and different partitioning of the alloying elements. This study indicates a methodology through SLM to obtain Ti-6Al-4V with an as-deposited α + β microstructure which is more desirable than that the typical fully martensitic microstructure typically obtained after SLM.
机译：通过增材制造（AM）技术选择性激光熔化（SLM）制造的Ti-6Al-4V零件由于其良好的马氏体微观结构，通常显示出较差的延展性。这项研究旨在评估当使用较长的激光/材料相互作用时间时是否可以获得更合适的微观结构。制备了具有α+β微观结构的预制组件，并通过各种显微镜技术对其进行了表征。讨论了与构建平台温度，循环再加热以及在此过程中产生的热应力有关的微观结构演变。还评估和讨论了样品的硬度。硬度随样品中观察到的不同显微组织形态以及合金元素的不同分配而变化。这项研究表明通过SLM获得具有沉积的α+β微观结构的Ti-6Al-4V的方法，比通过SLM获得的典型的全马氏体微观结构更为理想。

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  • 来源
    《Journal of Materials Research》 |2014年第17期|2028-2035|共8页
  • 作者

    Mario Simonelli; Yau Yau Tse; C. Tuck;

  • 作者单位

    Department of Materials, Loughborough University, Loughborough LE11 3TU, United Kingdom;

    Department of Materials, Loughborough University, Loughborough LE11 3TU, United Kingdom;

    Additive Manufacturing and 3D Printing Research Group, Department of Mechanical, Materials and Manufacturing Engineering, Faculty of Engineering, The University of Nottingham, Nottingham NG7 2RD, United Kingdom;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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