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Experiment characterization and formulation estimation of tensile properties for selective laser melting manufactured 304L stainless steel

机译：试验表征与选择性激光熔化的拉伸性能的制定估计制造的304L不锈钢

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摘要

Additive manufacturing (AM) becomes more and more prevalent and offers enormous benefits on account of its inherent layer-by-layer nature. Material characterizations of such printed metal alloy are essential and necessary to understand the unique process-properties maps of different structures. From which, the tensile performance is one of the most demanding and concerning behaviors by diverse requirements from industries. In this study, experimental methodologies (uniaxial tensile testing and automated ball indentation testing) and constitutive relations (Holloman, Swift, Voce, and Ludwigson formulation) studies were performed to AISI 304L stainless steel. A comparative study was presented between selective laser melting fabricated parts and conventional counterparts. Outputs indicated the Swift formulations provided the best estimations of the flow curve. All four formulations provided reasonable estimations of ultimate tensile strength. Anisotropic study in tensile strength and work hardening exponent with varying build orientations were correlated to grain structures. The nondestructive automated ball indentation test yielded the acceptable tensile strength with the accurate determination of plastic chordal diameter. However, the automated ball indentation test demonstrated an insensitive manner on the anisotropy.
机译：添加剂制造（AM）变得越来越普遍，并且由于其固有的逐层性质而提供巨大的益处。这种印刷金属合金的材料表征对于了解不同结构的独特过程属性图至关重要和必要。从中，拉伸性能是由行业各种需求的最苛刻和最令人苛刻的行为之一。在本研究中，对AISI 304L不锈钢进行了实验方法（单轴拉伸测试和自动滚珠凹口测试）和本构关系（Holloman，Swift，Voce和Ludwigson配方）研究。在选择性激光熔融制造的零件和常规对应物之间提出了对比研究。输出指示SWIFT制剂提供了流量曲线的最佳估计。所有四种配方提供了合理的抗拉强度估计。具有不同构建取向的拉伸强度和工作硬化指数的各向异性研究与晶粒结构相关。无损自动化球压痕试验可接受可接受的拉伸强度，精确测定塑料曲线直径。然而，自动球凹口测试在各向异性上表现出不敏感的方式。

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  • 来源
    《Materials Science and Engineering》 |2020年第4期|140086.1-140086.12|共12页
  • 作者

    Tan Pan; Sreekar Karnati; Yunlu Zhang; Xinchang Zhang; Chia-Hung Hung; Lan Li; Frank Liou;

  • 作者单位

    Department of Mechanical & Aerospace Engineering Missouri University of Science and Technology Rolla MO 65409 USA;

    Department of Mechanical & Aerospace Engineering Missouri University of Science and Technology Rolla MO 65409 USA;

    Department of Mechanical & Aerospace Engineering Missouri University of Science and Technology Rolla MO 65409 USA;

    Department of Mechanical & Aerospace Engineering Missouri University of Science and Technology Rolla MO 65409 USA;

    Department of Mechanical & Aerospace Engineering Missouri University of Science and Technology Rolla MO 65409 USA;

    Department of Mechanical & Aerospace Engineering Missouri University of Science and Technology Rolla MO 65409 USA;

    Department of Mechanical & Aerospace Engineering Missouri University of Science and Technology Rolla MO 65409 USA;

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

    Additive manufacturing; Stainless steel 304L; Constitutive model; Digital image correlation; Tensile test; ABI test;

    机译：添加剂制造;不锈钢304L;本构模型;数字图像相关;拉伸试验;ABI测试;

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