Additive manufacturing of Inconel625-HSLA Steel functionally graded material by wire arc additive manufacturing

IF 0.9 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING Metallurgical Research & Technology Pub Date : 2021-01-01 DOI:10.1051/metal/2021063

Jiarong Zhang, X. Di, Chengning Li, Xipeng Zhao, Lin Ba, Xin Jiang

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引用次数: 7

Abstract

Functional graded materials (FGMs) have been widely applied in many engineering fields, and are very potential to be the substitutions of dissimilar metal welding joints due to their overall performance. In this work, the Inconel625-high-strength low-alloy (HSLA) Steel FGM was fabricated by wire arc additive manufacturing (WAAM). The chemical composition distribution, microstructure, phase evolution and mechanical properties of the FGM were examined. With the increasing of HSLA Steel, the chemical composition appeared graded distribution, and the primary dendrite spacing was largest in graded region with 20%HSLA Steel and then gradually decreased. And the main microstructure of the FGM transformed from columnar dendrites to equiaxed dendrites. Laves phase precipitated along dendrites boundary when the content of HSLA Steel was lower than 70% and Nb-rich carbides precipitated when the content of HSLA Steel exceeded to 70%. Microhardness and tensile strength gradually decreased with ascending content of HSLA Steel, and had a drastic improvement (159HV to 228HV and 355Mpa to 733Mpa) when proportion of HSLA Steel increased from 70% to 80%.

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电弧增材制造Inconel625-HSLA钢功能梯度材料

功能梯度材料(fgm)已广泛应用于许多工程领域，由于其综合性能优异，在替代异种金属焊接接头方面具有很大的潜力。采用电弧增材制造技术(WAAM)制备了inconel625高强度低合金(HSLA)钢FGM。研究了FGM的化学成分分布、显微组织、相演化及力学性能。随着HSLA钢含量的增加，化学成分呈梯度分布，初生枝晶间距在HSLA钢含量为20%时最大，然后逐渐减小。FGM的主要组织由柱状枝晶转变为等轴枝晶。当HSLA钢的含量低于70%时，沿枝晶边界析出片状相;当HSLA钢的含量超过70%时，析出富铌碳化物。显微硬度和抗拉强度随着HSLA钢添加量的增加而逐渐降低，当HSLA钢添加量从70%增加到80%时，显微硬度和抗拉强度显著提高(159HV增加到228HV, 355Mpa增加到733Mpa)。

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来源期刊

Metallurgical Research & Technology METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

1.70

自引率

9.10%

发文量

审稿时长

4.4 months

期刊介绍： Metallurgical Research and Technology (MRT) is a peer-reviewed bi-monthly journal publishing original high-quality research papers in areas ranging from process metallurgy to metal product properties and applications of ferrous and non-ferrous metals and alloys, including light-metals. It covers also the materials involved in the metal processing as ores, refractories and slags. The journal is listed in the citation index Web of Science and has an Impact Factor. It is highly concerned by the technological innovation as a support of the metallurgical industry at a time when it has to tackle severe challenges like energy, raw materials, sustainability, environment... Strengthening and enhancing the dialogue between science and industry is at the heart of the scope of MRT. This is why it welcomes manuscripts focusing on industrial practice, as well as basic metallurgical knowledge or review articles.