Effects of annealing temperature on microstructure and mechanical properties of LZ91 alloy. Issue 18 (11th December 2020)

• Record Type: Journal Article
• Authors: Yang, Yan; Li, Minmin; Deng, Hongju; Ren, Fengjuan; Zhang, Hanzhu; Jiang, Bin; Peng, Xiaodong; Pan, Fusheng
• Is Part Of: Materials science and technology. Volume 36:Issue 18(2020)
• Page Start: 2010
• Page End: 2017
• Publication Date: 2020-12-11
• Subjects: LZ91 alloy -- cold-rolled -- annealing -- microstructure -- mechanical properties; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/02670836.2020.1853361
• Languages: English
• ISSNs: 0267-0836

Abstract

Abstract : Effects of annealing temperature on the microstructure and mechanical properties of cold-rolled LZ91 alloy are investigated. The results indicate that LZ91 alloy is composed of α-Mg, β-Li, MgLiZn and MgLi2 Zn phases. The recrystallization of the cold-rolled alloy is completed when annealing at 125°C and a large number of fine equiaxed grains with an average grain size of 3 µm is formed. The cold-rolled LZ91 alloys annealed at 125°C have the optimized comprehensive mechanical properties with the elongation, ultimate tensile strength and microhardness of 56.1%, 157 MPa and 51.2 HV, respectively. With the further increase in annealing temperature, the grain size begins to coarsen, which leads to the decrease in strength and ductility of the alloy.