Chemistry effects on ODS steel consolidated via laser powder bed fusion from GARS powder

IF 4.8 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2025-05-06 DOI:10.1016/j.matchar.2025.115141

Matthew deJong , Sourabh Saptarshi , Iver Anderson , Jordan Tiarks , Chad Parish , Megan Carter , David Armstrong , Christopher Rock , Timothy Horn , Djamel Kaoumi

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引用次数: 0

Abstract

Oxide Dispersion Strengthened (ODS) steels are promising candidate alloys for structural and cladding applications in extreme environments. They contain a high density of nanoscale oxides for high temperature mechanical strength and radiation resistance. In this work, gas atomization reaction synthesis (GARS) was used to produce powders that were used for additive manufacturing (AM) Laser Powder Bed Fusion consolidation of ODS steels, in order to skip the traditional mechanical alloying of blended yttria and alloy powders. Powder containing iron, chromium, and tungsten with varying amounts of yttrium, titanium, oxygen and zirconium were used to produce ODS steel samples. AM consolidated specimens and powder samples were characterized with transmission electron microscopy. TEM imaging, diffraction patterns, and energy dispersive X-ray spectroscopy (EDS) was used to identify phases present before and after consolidation across chemistries. The effect of the controlled oxygen input (from GARS) and the oxide-forming additions (Y, Ti, Zr) on precipitate size distribution and composition is substantiated and discussed.

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激光粉末床熔炼GARS粉末固结ODS钢的化学效应

氧化物弥散强化（ODS）钢是在极端环境下应用于结构和覆层的有前途的候选合金。它们含有高密度的纳米级氧化物，具有高温机械强度和抗辐射性。本研究采用气雾化反应合成（GARS）技术制备了用于ODS钢增材制造（AM）激光粉末床固结的粉末，从而跳过了传统的混合钇和合金粉末的机械合金化。含有铁、铬和钨的粉末以及不同数量的钇、钛、氧和锆用于生产ODS钢样品。用透射电镜对AM固结试样和粉末试样进行了表征。透射电镜成像、衍射图和能量色散x射线光谱（EDS）用于确定化学物质固结前后存在的相。本文证实并讨论了可控氧输入（来自GARS）和成氧添加（Y、Ti、Zr）对析出相尺寸分布和组成的影响。

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 Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.