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选择性激光熔化工艺的工艺参数对AlSi10Mg合金热导率的影响

Effects of Processing Parameters of Selective Laser Melting Process on Thermal Conductivity of AlSi10Mg Alloy.

作者信息

Kim Moo-Sun

机构信息

Urban Transit Research Team, Korea Railroad Research Institute, Uiwang 16105, Korea.

出版信息

Materials (Basel). 2021 May 6;14(9):2410. doi: 10.3390/ma14092410.

DOI:10.3390/ma14092410
PMID:34066334
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8125774/
Abstract

Selected laser melting (SLM) is a representative process of powder-bed type 3D printing technology that is used to manipulate metals and it generally results in various structural properties according to the process conditions. In this study, a thermal conductivity test was conducted on AlSi10Mg specimens that were manufactured using the SLM process to investigate the influence of various process conditions on the thermophysical characteristics and cellular microstructure of the samples. The building direction of the specimen, laser scan speed, and hatch spacing were considered as process variables, and the thermal conductivity was analyzed for each process variable. In the test results, as the polar angle of the specimen increased from 0° to 90°, the thermal conductivity increased. Furthermore, the thermal conductivity gradually decreased as the scan speed and hatch spacing increased. The differences in thermal characteristics are discussed in connection with the microstructure of the cells constituting the melt pool. The solidified melt pool that formed by the laser beam is composed of cells consisting of an Al matrix and a surrounding Si-rich area. The differences in thermal conductivity of the overall specimens are explained based on the variations in thermal conductivity and cell shape and size for each chemical component.

摘要

选区激光熔化（SLM）是粉末床型3D打印技术的一种代表性工艺，用于加工金属，并且根据工艺条件通常会产生各种结构特性。在本研究中，对使用SLM工艺制造的AlSi10Mg试样进行了热导率测试，以研究各种工艺条件对样品的热物理特性和胞状微观结构的影响。将试样的构建方向、激光扫描速度和扫描间距视为工艺变量，并对每个工艺变量的热导率进行了分析。在测试结果中，随着试样的极角从0°增加到90°，热导率增加。此外，随着扫描速度和扫描间距的增加，热导率逐渐降低。结合构成熔池的胞状组织的微观结构讨论了热特性的差异。由激光束形成的凝固熔池由由Al基体和周围富Si区域组成的胞状组织构成。基于每种化学成分的热导率以及胞状组织形状和尺寸的变化，解释了整体试样热导率的差异。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/5b8493fd3da7/materials-14-02410-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/a98cbf4d991e/materials-14-02410-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/20d15a4c926d/materials-14-02410-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/154ecad8caf6/materials-14-02410-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/53b1bee8fbfc/materials-14-02410-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/d346b0578fb9/materials-14-02410-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/85f3100dd9da/materials-14-02410-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/6f5f4a31821c/materials-14-02410-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/f594fa928686/materials-14-02410-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/e08405aa5d07/materials-14-02410-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/d55a79127298/materials-14-02410-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/5b8493fd3da7/materials-14-02410-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/a98cbf4d991e/materials-14-02410-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/3484f819b81e/materials-14-02410-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/20d15a4c926d/materials-14-02410-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/154ecad8caf6/materials-14-02410-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/53b1bee8fbfc/materials-14-02410-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/d346b0578fb9/materials-14-02410-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/85f3100dd9da/materials-14-02410-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/6f5f4a31821c/materials-14-02410-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/f594fa928686/materials-14-02410-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/e08405aa5d07/materials-14-02410-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/d55a79127298/materials-14-02410-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3a53/8125774/5b8493fd3da7/materials-14-02410-g012.jpg

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