The potential benefit of pseudo high thermal conductivity for laser powder bed fusion additive manufacturing

IF 8.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Letters Pub Date : 2023-08-07 DOI:10.1080/21663831.2023.2243990

H. Ding, Selami Emanet, Yeh-Peng Chen, Shengmin Guo

引用次数: 0

Abstract

This study examined the impact of transient pseudo high thermal conductivity to the fabrication of crack-free parts with Laser Powder-Bed-Fusion (L-PBF) based additive manufacturing (AM) method. Thermal diffusivity and thermal conductivity of L-PBF samples made by mixtures of IN939 alloy and Si powders were investigated. At temperatures above 800°C, the as-fabricated Si-doped IN939 was observed to exhibit an exceptionally high thermal conductivity, which can be attributed to the occurrence of endothermic reactions. This pseudo high thermal conductivity can effectively minimize the thermal stress and offers a potential solution to produce crack-free L-PBF parts for nonweldable alloys. GRAPHICAL ABSTRACT IMPACT STATEMENT The paper proposes a potential solution for preparing crack-free L-PBF nonweldable alloys. Modifying the composition to introduce an endothermic reaction has been shown to decrease the tendency of cracking.

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伪高导热系数在激光粉末床熔融增材制造中的潜在优势

本研究研究了瞬态伪高导热系数对激光粉末床熔合(L-PBF)增材制造(AM)方法制备无裂纹零件的影响。研究了IN939合金与Si粉混合制备的L-PBF样品的热扩散率和导热系数。在800℃以上的温度下，制备的si掺杂IN939表现出异常高的导热性，这可以归因于吸热反应的发生。这种伪高导热系数可以有效地减小热应力，为不可焊合金生产无裂纹L-PBF零件提供了潜在的解决方案。本文提出了一种制备无裂纹L-PBF不可焊合金的潜在解决方案。修改组合物以引入吸热反应已被证明可以减少开裂的倾向。

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

Materials Research Letters Materials Science-General Materials Science

CiteScore

12.10

自引率

3.60%

发文量

审稿时长

3.3 months

期刊介绍： Materials Research Letters is a high impact, open access journal that focuses on the engineering and technology of materials, materials physics and chemistry, and novel and emergent materials. It supports the materials research community by publishing original and compelling research work. The journal provides fast communications on cutting-edge materials research findings, with a primary focus on advanced metallic materials and physical metallurgy. It also considers other materials such as intermetallics, ceramics, and nanocomposites. Materials Research Letters publishes papers with significant breakthroughs in materials science, including research on unprecedented mechanical and functional properties, mechanisms for processing and formation of novel microstructures (including nanostructures, heterostructures, and hierarchical structures), and the mechanisms, physics, and chemistry responsible for the observed mechanical and functional behaviors of advanced materials. The journal accepts original research articles, original letters, perspective pieces presenting provocative and visionary opinions and views, and brief overviews of critical issues.