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In situ characterization of the deformation and failure behavior of non-stochastic porous structures processed by selective laser melting

机译：选择性激光熔化处理非随机多孔结构的变形和破坏行为的原位表征

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摘要

Cellular materials are promising candidates for load adapted light-weight structures. Direct manufactur-ing (DM) tools are effective methods to produce non-stochastic structures. Many DM studies currently focus on optimization of the geometric nature of the structures obtained. The literature available so far reports on the mechanical properties but local deformation mechanisms are not taken into account. In order to fill this gap, the current study addresses the deformation behavior of a lattice structure pro-duced by selective laser melting (SLM) on the local scale by means of a comprehensive experimental in situ approach, including electron backscatter diffraction, scanning electron microscopy and digital image correlation. SLM-processed as well as heat treated lattice structures made from TiA16V4 alloy were employed for mechanical testing. It is demonstrated that the current approach provides means to under-stand the microstructure-mechanical property-local deformation relationship to allow for optimization of load adapted lattice structures.
机译：蜂窝材料有望成为适用于负载的轻型结构的候选材料。直接制造（DM）工具是生产非随机结构的有效方法。当前，许多DM研究集中在优化所获得结构的几何性质上。迄今为止可获得的文献报道了机械性能，但未考虑局部变形机理。为了填补这一空白，当前的研究通过全面的原位实验方法，包括局部激光选择性熔化法（SLM）在局部尺度上产生的晶格结构的变形行为，包括电子背散射衍射，扫描电子显微镜和数字图像相关。由TiA16V4合金制成的经过SLM处理以及热处理的晶格结构用于机械测试。证明了当前的方法提供了理解微观结构-机械性能-局部变形关系的手段，以允许优化载荷适应的晶格结构。

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  • 来源
    《Materials Science and Engineering》 |2011年第27期|p.7962-7967|共6页
  • 作者

    B. Gorny; T. Niendorf; J. Lackmann; M. Thoene; T. Troester; HJ. Maier;

  • 作者单位

    Lehrstuhlfür Werkstoffkunde (Materials Science), University of Paderborn, Pohlweg 47-49,33098 Paderborn, Germany;

    Lehrstuhlfür Werkstoffkunde (Materials Science), University of Paderborn, Pohlweg 47-49,33098 Paderborn, Germany;

    Lehrstuhlfür Werkstoffkunde (Materials Science), University of Paderborn, Pohlweg 47-49,33098 Paderborn, Germany;

    Lehrstuhlfür Lekhtbau im Automobil (Automotive Lightweight Construction), University ofPaderborn, Pohlweg 47-49, 33098 Paderbom, Germany Direct Manufacturing Research Center (DMRC), Mersinweg 3,33098 Paderbom, Germany;

    Lehrstuhlfür Lekhtbau im Automobil (Automotive Lightweight Construction), University ofPaderborn, Pohlweg 47-49, 33098 Paderbom, Germany Direct Manufacturing Research Center (DMRC), Mersinweg 3,33098 Paderbom, Germany;

    Lehrstuhlfür Werkstoffkunde (Materials Science), University of Paderborn, Pohlweg 47-49,33098 Paderborn, Germany;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Direct manufacturing; Selective laser melting; Lattice structures; Digital image correlation; Microstructure;

    机译：直接制造;选择性激光熔化;晶格结构;数字图像相关;微观结构;

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