Columnar grain width control for SS316L via hatch spacing manipulation in laser powder bed fusion

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

Materials Research Letters Pub Date : 2022-11-03 DOI:10.1080/21663831.2022.2140018

Zhiheng Hu, Shubo Gao, Junfei Tai, Shuo Qu, Junhao Ding, Xu Song, Zheng Fan

引用次数: 2

Abstract

This study provides a quantitative way to tailor the grain structure in laser powder bed fusion (LPBF). Square-bottomed columnar grains (SCGs) were developed with a certain width roughly equal to the hatch spacing. The development of SCGs relied on different distinguishable regions, which were identified based on the differences in microstructural features between the melt-pool side and centreline. High lattice rotation accumulated at the melt-pool centreline, leading to grain boundaries forming at the centreline regions. The ultrasonic attenuation measurements and microhardness tests further validated the controllable properties. The findings indicated a novel approach to customise the material property. GRAPHICAL ABSTRACT IMPACT STATEMENT A method to quantitatively control the columnar grain width in laser powder bed fusion was uncovered. The controllable properties were indicated, and the formation mechanism was revealed.

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SS316L激光粉末床熔接中缝间距控制柱状晶粒宽度

该研究为激光粉末床聚变（LPBF）中晶粒结构的定制提供了一种定量的方法。方底柱状晶粒（SCG）的宽度大致等于舱口间距。SCG的发展依赖于不同的可区分区域，这些区域是基于熔池侧和中心线之间微观结构特征的差异来识别的。在熔池中心线处积累了高晶格旋转，导致在中心线区域形成晶界。超声衰减测量和显微硬度测试进一步验证了其可控性能。这些发现表明了一种定制材料特性的新方法。图形摘要影响声明揭示了一种定量控制激光粉末床聚变中柱状晶粒宽度的方法。指出了其可控性质，揭示了其形成机理。

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.