爆炸焊接Nb/Q345R层状复合材料的热震性能研究

doi:10.11896/cldb.20070291

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Abstract As a refractory metal, niobium has the characteristics of high melting point, good plasticity, strong acid resistance and liquid metal corrosion resistance, and is widely used in electronics, machinery, aerospace and other fields. This paper studies the thermal shock performance of the Nb/Q345R laminated composite fabricated by explosive welding material. The Nb/Q345R sample is heated to 800 ℃ and 1 000 ℃ in hydrogen and then rapidly cooled to complete a thermal shock. After 10, 30, 50 thermal shock cycles, the interface structure and bonding strength of the sample changed, and then the thermal shock performance was evaluated. X-ray diffraction (XRD), scanning electron microscopy (SEM) and other characterization methods are used to analyze the changes in material composition and interface structure morphology, and the interfacial bonding strength of layered composites is measured through compression shear tests. The research results show that at 800°C for 10 thermal shock cycles, microcracks begin to occur at the interface of the layered material, and at 1 000 ℃ for 50 cycles, the cracks at the material interface expand and extend along the interface, resulting in a significant reduction in the interface bonding strength. Reduced to 13.22% of the bonding strength of the material itself.

Key words： explosive welding Nb/Q345R laminated composite material thermal shock performance compression shear test interface structure and property

Published: 30 September 2021

CLC number:

TB331

Fund:This work was financially supported by National Key R & D Program of China (2018YFC1901700).

About author:: Xiaoyu Song, a master student of Central South University. Graduated from Central South University in 2018 with a bachelor's degree in engineering.Focusing on the research of recycling of refractory metals.

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	SONG Xiaoyu
	WANG Dezhi
	WU Zhuangzhi
	DUAN Bohua
	BI Hailian
	LIU Xinli

Cite this article:

SONG Xiaoyu,WANG Dezhi,WU Zhuangzhi, et al. Research on Thermal Shock Performance of Nb/Q345R Laminated Composite Fabricated by Explosive Welding[J]. Materials Reports, 2021, 35(18): 18131-18135.

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http://www.mater-rep.com/EN/10.11896/cldb.20070291 OR http://www.mater-rep.com/EN/Y2021/V35/I18/18131

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