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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers. Part L, Journal of Materials: Design and Application >In-plane anisotropy of selective laser-melted stainless steel: The importance of the rotation angle increment and the limitation window
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In-plane anisotropy of selective laser-melted stainless steel: The importance of the rotation angle increment and the limitation window

机译：选择性激光熔化不锈钢面内各向异性：旋转角度增量的重要性和限制窗口

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摘要

The thorough description of the influence of the process conduct in powder-bed-based additive manufacturing on the mechanical properties of the fabricated components represents an ongoing challenge. A recent investigation highlighted that a minor safety feature, such as limiting the range of possible laser beam movements, to avoid interactions between the irradiation and emerging smoke and weld splashes, can cause a noteworthy alteration of the mechanical properties. In this study, the tensile characteristics of selective laser-melted stainless steel (1.4404, 316L) fabricated with two different process conducts were investigated, both of which yielded similar relative densities and surface hardness values. It was found that, besides these two characteristics, the tensile strength (yield and ultimate tensile strength) remained stable, whereas the linear elastic properties, as well as the breaking elongation, exhibited great fluctuations. The Young's modulus in the build-plane ranged from 151 to 208 GPa, and the breaking elongation ranged, respectively, from 33% to 43%. Furthermore, it has been found that this anisotropy is an adjustable characteristic and can be modified via two parameters, the rotation angle increment of the irradiation pathways between successive layers and their total admissible range, also referred to as the limitation window.
机译：彻底描述粉末类添加剂制造对制造成分的机械性能的粉末类添加剂制造的影响代表了持续的挑战。最近的研究突出显示了一个次要的安全特性，例如限制可能的激光束运动范围，以避免辐射和出现烟雾和焊接之间的相互作用，可能导致机械性能值得注意的改变。在该研究中，研究了用两种不同的工艺传导制造的选择性激光熔化的不锈钢（1.4404,316L）的拉伸特性，两者都产生了类似的相对密度和表面硬度值。结果发现，除了这两个特性之外，拉伸强度（产率和最终拉伸强度）保持稳定，而线性弹性性能以及断裂伸长率呈现出极大的波动。杨氏的模量在151至208GPa的范围内，分别从33％到43％的伸长率。此外，已经发现，这种各向异性是可调节的特性，并且可以通过两个参数进行修改，连续层之间的照射途径的旋转角度增加以及它们的总可允许范围，也称为限制窗口。

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