退火温度对5052/AZ31B爆炸复合板组织与性能的影响

doi:10.11896/cldb.21040005

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Abstract The microstructure and properties of 5052/AZ31B explosive welded composite plates were studied after annealing at 300 ℃, 350 ℃ and 400 ℃.The results show that magnesium atom is easy to diffuse to the aluminum side during annealing, and the diffusion layer is mainly located at the aluminum side near the interface. With the annealing temperature rising, the diffusion layer becomes thicker. The phase composition at the interface before annealing was Mg matrix, Al matrix, Mg₂Al₃ and Mg₁₇Al₁₂, and they remained unchanged after annealing at 300 ℃, 350 ℃ and 400 ℃. When the annealing temperature rises from 300 ℃ to 400 ℃, the tensile strength of the composite plate gradually decreases, while the reduction of area and the elongation after fracture increase. The morphology of the tensile fracture shows that the aluminum side of the composite plate presents ductile fracture while the magnesium side presents brittle fracture. The shear strength of the interface bonding zone of the composite plate is respective 50.88 MPa, 33.15 MPa and 19.50 MPa after annealing at 300 ℃, 350 ℃ and 400 ℃,which is significantly lower than that before annealing(98.44 MPa). The hardness of the interface of the composite plate is respectively 158.1HV, 146.3HV and 152.6HV after annealing at 300 ℃, 350 ℃ and 400 ℃, which is significantly higher than that before annealing(129.6HV), and the change of hardness at the magnesium side is great. The high hardness of the interface bonding zone after annealing is due to the formation of the hard and brittle intermetallic compounds Mg₂Al₃ and Mg₁₇Al₁₂ in the diffusion layer.

Key words： 5052/AZ31B composite plate annealing diffusion layer microstructure property strength hardness

Published: 10 August 2022 Online: 2022-08-15

CLC number:

TG156

Fund:Xi'an Science and Technology Innovation Guidance Project (201805032YD10CG16(3)), 2019 Xi'an Aviation Technology Venture Capital Project(2019-01), Key Special Project of ‘Science and Technology Power Economy 2020’, and Fundamental Research Funds for the Central Universities, CHD (300102311403).

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	ZHANG Zhen
	DING Xu
	TIAN Xiaodong
	SHI Haojie
	LUO Hailong

Cite this article:

ZHANG Zhen,DING Xu,TIAN Xiaodong, et al. Effect of Annealing Temperature on Microstructure and Properties of 5052/AZ31B Explosive Composite Plate[J]. Materials Reports, 2022, 36(15): 21040005-6.

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http://www.mater-rep.com/EN/10.11896/cldb.21040005 OR http://www.mater-rep.com/EN/Y2022/V36/I15/21040005

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