In situ monitoring the effects of Ti6Al4V powder oxidation during laser powder bed fusion additive manufacturing

IF 14 1区工程技术 Q1 ENGINEERING, MANUFACTURING

International Journal of Machine Tools & Manufacture Pub Date : 2023-08-01 DOI:10.1016/j.ijmachtools.2023.104049

Gowtham Soundarapandiyan , Chu Lun Alex Leung , Carol Johnston , Bo Chen , Raja H.U. Khan , Phil McNutt , Alisha Bhatt , Robert C. Atwood , Peter D. Lee , Michael E. Fitzpatrick

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引用次数: 1

Abstract

Making laser powder bed fusion (L-PBF) additive manufacturing process sustainable requires effective powder recycling. Recycling of Ti6Al4V powder in L-PBF can lead to powder oxidation, however, such impact on laser-matter interactions, process, and defect dynamics during L-PBF are not well understood. This study reveals and quantifies the effects of processing Ti6Al4V powders with low (0.12 wt%) and high (0.40 wt%) oxygen content during multilayer thin-wall L-PBF using in situ high speed synchrotron X-ray imaging. Our results reveal that high oxygen content Ti6Al4V powder can reduce melt ejections, surface roughness, and defect population in the built parts. With increasing oxygen content in the part, there is an increase in microhardness due to solid solution strengthening and no significant change in the microstructure is evident.

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激光粉末床熔融增材制造过程中Ti6Al4V粉末氧化影响的原位监测

要使激光粉末床融合（L-PBF）增材制造工艺可持续发展，需要有效的粉末回收利用。Ti6Al4V粉末在L-PBF中的再循环可能导致粉末氧化，然而，在L-PBF过程中，这种对激光-物质相互作用、过程和缺陷动力学的影响尚不清楚。本研究揭示并量化了在使用原位高速同步加速器X射线成像的多层薄壁L-PBF过程中处理低（0.12 wt%）和高（0.40 wt%）氧含量的Ti6Al4V粉末的影响。我们的研究结果表明，高氧含量的Ti6Al4V粉末可以减少制造零件中的熔体喷射、表面粗糙度和缺陷数量。随着零件中氧含量的增加，由于固溶强化，显微硬度增加，显微组织没有明显变化。

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

International Journal of Machine Tools & Manufacture 工程技术-工程：机械

CiteScore

25.70

自引率

10.00%

发文量

审稿时长

18 days

期刊介绍： The International Journal of Machine Tools and Manufacture is dedicated to advancing scientific comprehension of the fundamental mechanics involved in processes and machines utilized in the manufacturing of engineering components. While the primary focus is on metals, the journal also explores applications in composites, ceramics, and other structural or functional materials. The coverage includes a diverse range of topics: - Essential mechanics of processes involving material removal, accretion, and deformation, encompassing solid, semi-solid, or particulate forms. - Significant scientific advancements in existing or new processes and machines. - In-depth characterization of workpiece materials (structure/surfaces) through advanced techniques (e.g., SEM, EDS, TEM, EBSD, AES, Raman spectroscopy) to unveil new phenomenological aspects governing manufacturing processes. - Tool design, utilization, and comprehensive studies of failure mechanisms. - Innovative concepts of machine tools, fixtures, and tool holders supported by modeling and demonstrations relevant to manufacturing processes within the journal's scope. - Novel scientific contributions exploring interactions between the machine tool, control system, software design, and processes. - Studies elucidating specific mechanisms governing niche processes (e.g., ultra-high precision, nano/atomic level manufacturing with either mechanical or non-mechanical "tools"). - Innovative approaches, underpinned by thorough scientific analysis, addressing emerging or breakthrough processes (e.g., bio-inspired manufacturing) and/or applications (e.g., ultra-high precision optics).