Effect of Bonding Temperature on the Interfacial Microstructure and Mechanical Properties of W/Steel Joints Diffusion-Bonded with a CoFeNi Interlayer

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

JOM Pub Date : 2024-09-23 DOI:10.1007/s11837-024-06877-9

Chunyan Wang, Guoyun Tao, Shuibao Liang, Kuijing Song, Chengyong Wang, Yucheng Wu, Zhihong Zhong

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引用次数: 0

Abstract

Realizing the reliable bonding of tungsten (W) and reduced activation ferritic/martensitic (RAFM) steel is of significance for the fabrication of plasma-facing components in fusion reactors. Considering the significant differences in physical and chemical properties between the substrates of W and RAFM steel, the development of novel joining materials has attracted much attention in recent years. In the present work, a medium entropy alloy CoFeNi interlayer was selected to diffusion bond W and RAFM steel by utilizing an electric field-assisted joining technique. The effect of bonding temperature on the interface microstructure and mechanical properties of the joint was studied at room temperature. For the joints diffusion-bonded in the temperature range between 800°C and 1100°C for 15 min under 20 MPa, good metallurgical bonding without cracks and discontinuities were achieved at both the steel/CoFeNi and CoFeNi/W interfaces. Face-centered cubic (FCC) solid solutions were formed at the steel/CoFeNi interface, while both FCC and μ phases were identified at the CoFeNi/W interface. The W/CoFeNi/steel joint diffusion bonded at 900°C has the highest tensile strength of 313 MPa. Moreover, the comparison of the joint tensile strength between this work and previous researches has been discussed.

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结合温度对钴铁镍中间层扩散结合的 W/Steel 接头的界面微观结构和机械性能的影响

实现钨（W）和还原活化铁素体/马氏体（RAFM）钢的可靠结合对于制造聚变反应堆中的等离子体面组件具有重要意义。考虑到 W 和 RAFM 钢基材在物理和化学性质上的显著差异，新型连接材料的开发近年来备受关注。在本研究中，利用电场辅助接合技术，选择了中熵合金 CoFeNi 中间层来扩散接合 W 和 RAFM 钢。在室温下研究了接合温度对接合界面微观结构和机械性能的影响。在 20 兆帕的压力下，在 800°C 至 1100°C 的温度范围内扩散接合 15 分钟后，钢/CoFeNi 和 CoFeNi/W 界面都实现了良好的冶金接合，没有出现裂缝和不连续性。在钢/CoFeNi 界面形成了面心立方（FCC）固溶体，而在 CoFeNi/W 界面则发现了 FCC 和 μ 相。在 900°C 温度下扩散结合的 W/CoFeNi/W 钢接头的抗拉强度最高，达到 313 兆帕。此外，还讨论了本研究与之前研究的接头抗拉强度对比。

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

JOM 工程技术-材料科学：综合

CiteScore

4.50

自引率

3.80%

发文量

540

审稿时长

2.8 months

期刊介绍： JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.