Tensile anisotropy of powder bed fusion steel 316L: A practical study on the effect of build orientation

IF 2.5 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications Pub Date : 2024-03-12 DOI:10.1177/14644207241238916

Ivan O’Neill, Aashrith Dayanand, Shane Keaveney, Kyriakos I. Kourousis

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Abstract

This study investigated the tensile anisotropy of steel 316L fabricated via laser powder bed fusion (L-PBF), built at different orientations. Tensile tests were performed on as-built L-PBF specimens produced at 0°, 15°, 30°, 45°, 60° and 90° angles. The yield strength, ultimate tensile strength and elasticity modulus experienced a decrease with an increasing build angle. Conversely, elongation at fracture increased as the build angle increased. The Elasticity modulus was found to be substantially lower than the nominal values reported in the material data sheet of the L-PBF equipment manufacturer. Fractography performed via Scanning Electron Microscopy (SEM) has found indications of porosity and lack of fusion that may have contributed to lower Elasticity modulus and an overall impacted mechanical performance. A complementary powder quality analysis has offered further insights on this and provided indications on the powder recycling impact.

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粉末床熔融钢 316L 的拉伸各向异性：关于构建方向影响的实用研究

本研究调查了通过激光粉末床熔融（L-PBF）制造的 316L 钢在不同方向上的拉伸各向异性。对按 0°、15°、30°、45°、60° 和 90° 角制作的 L-PBF 试样进行了拉伸试验。屈服强度、极限拉伸强度和弹性模量随着制作角度的增加而降低。相反，断裂伸长率随着构建角度的增加而增加。弹性模量大大低于 L-PBF 设备制造商材料数据表中的标称值。通过扫描电子显微镜（SEM）进行的断口分析发现了气孔和熔合不足的迹象，这可能是导致弹性模量降低和整体机械性能受到影响的原因。补充性粉末质量分析对此提供了进一步的见解，并提供了粉末回收影响的迹象。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 工程技术-材料科学：综合

CiteScore

4.70

自引率

8.30%

发文量

166

审稿时长

3 months

期刊介绍： The Journal of Materials: Design and Applications covers the usage and design of materials for application in an engineering context. The materials covered include metals, ceramics, and composites, as well as engineering polymers. "The Journal of Materials Design and Applications is dedicated to publishing papers of the highest quality, in a timely fashion, covering a variety of important areas in materials technology. The Journal''s publishers have a wealth of publishing expertise and ensure that authors are given exemplary service. Every attention is given to publishing the papers as quickly as possible. The Journal has an excellent international reputation, with a corresponding international Editorial Board from a large number of different materials areas and disciplines advising the Editor." Professor Bill Banks - University of Strathclyde, UK This journal is a member of the Committee on Publication Ethics (COPE).