Microstructure and mechanical properties of V-N micro-alloyed invar alloy part fabricated by wire arc additive manufacturing

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-06-24 DOI:10.1016/j.matlet.2025.138986

Cuixin Chen , Chenyu Zhao , Zhonghua Sun , Jun He , Weibing Guo , Haitao Xue , Hongxin Zhang

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引用次数: 0

Abstract

Wire arc additive manufacturing (WAAM) provides a viable solution for fabricating complex and medium-large size invar alloy parts. However, grain coarsening and strength descent are present in invar alloy fabricated by wire arc additive manufacturing. To solve these problems, a V-N micro-alloyed invar alloy was designed and used for wire arc additive manufacturing by drawing on the idea of microalloying in this paper. The results show that the addition of V-N elements promotes the precipitation of V (C, N) composite phase, which are distributed at grain boundaries and inside the grains, effectively refining the microstructure and improving the comprehensive mechanical properties of the WAAM-fabricated invar alloy. The average tensile strength and low-temperature impact toughness of the WAAM-fabricated V-N micro-alloyed invar alloy are 765 MPa and 130 J/cm², which are about 90 % and 23 % higher than the ordinary invar alloy.

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电弧增材制造V-N微合金invar合金零件的组织与力学性能

电弧增材制造（WAAM）为制造复杂和大中型合金零件提供了可行的解决方案。然而，电弧增材制造的invar合金存在晶粒粗化和强度下降的问题。为了解决这些问题，本文借鉴微合金化的思想，设计了一种V-N微合金化invar合金，并将其用于电弧丝的增材制造。结果表明：V-N元素的加入促进了分布在晶界和晶粒内部的V （C， N）复合相的析出，有效地细化了waam制备的invar合金的组织，提高了合金的综合力学性能；waam制备的V-N微合金英瓦尔合金的平均抗拉强度和低温冲击韧性分别为765 MPa和130 J/cm2，分别比普通英瓦尔合金提高约90%和23%。

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 Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive