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选择性激光熔化制造的IN 625的微观结构与拉伸性能各向异性

Microstructural and Tensile Properties Anisotropy of Selective Laser Melting Manufactured IN 625.

作者信息

Condruz Mihaela Raluca, Matache Gheorghe, Paraschiv Alexandru, Frigioescu Tiberius Florian, Badea Teodor

机构信息

National Research and Development Institute for Gas Turbines COMOTI, 220D Iuliu Maniu Av., 061126 Bucharest, Romania.

出版信息

Materials (Basel). 2020 Oct 28;13(21):4829. doi: 10.3390/ma13214829.

DOI:10.3390/ma13214829
PMID:33126747
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7663131/
Abstract

The present study was focused on the assessment of microstructural anisotropy of IN 625 manufactured by selective laser melting (SLM) and its influence on the material's room temperature tensile properties. Microstructural anisotropy was assessed based on computational and experimental investigations. Tensile specimens were manufactured using four building orientations (along , -axis, and tilted at 45° in the plane) and three different scanning strategies (90°, 67°, and 45°). The simulation of microstructure development in specimens built along the -axis, applying all three scanning strategies, showed that the as-built microstructure is strongly textured and is influenced by the scanning strategy. The 45° scanning strategy induced the highest microstructural texture from all scanning strategies used. The monotonic tensile test results highlighted that the material exhibits significant anisotropic properties, depending on both the specimen orientation and the scanning strategy. Regardless of the scanning strategy used, the lowest mechanical performances of IN 625, in terms of strength values, were recorded for specimens built in the vertical position, as compared with all the other orientations.

摘要

本研究聚焦于评估选择性激光熔化（SLM）制造的IN 625的微观结构各向异性及其对材料室温拉伸性能的影响。基于计算和实验研究对微观结构各向异性进行了评估。使用四种构建方向（沿 、-轴以及在 平面内倾斜45°）和三种不同扫描策略（90°、67°和45°）制造拉伸试样。对沿 -轴构建的试样应用所有三种扫描策略进行微观结构发展模拟，结果表明，成型后的微观结构具有强烈的织构，且受扫描策略影响。在所有使用的扫描策略中，45°扫描策略诱导出的微观结构织构最强。单调拉伸试验结果突出表明，该材料表现出显著的各向异性性能，这取决于试样方向和扫描策略。与所有其他方向相比，无论使用何种扫描策略，垂直构建的IN 625试样在强度值方面的力学性能最低。

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