Effects of Different Stretching Routes on Microstructure and Mechanical Properties of AZ31B Magnesium Alloy Sheets

doi:10.1016/j.jmst.2015.07.011

Abstract

Abstract: AZ31B magnesium alloy sheets were stretched by 13% along three different routes: the extrusion direction (Route A), 45° to the extrusion direction (Route B) and the transverse direction (Route C), and then were annealed at 350?°C for 60?min. The microstructure and texture, tensile mechanical properties and formability were investigated at room temperature. The results indicated that all the three stretched samples exhibited weakened basal texture, compared with the as-received sheet due to static recrystallization. By comparison, Route B processed sample showed the most dispersive basal texture, while Route A processed specimen exhibited the lowest basal intensity. Improved mechanical properties for the stretched and annealed sheets with different stretching routes were achieved. Furthermore, Route A processed sheet showed the highest Erichsen value compared with the samples processed along Route B and Route C.

Key words: Extruded AZ31 sheet, Microstructure, Texture, Formability

Jingren Dong, Dingfei Zhang, Jing Sun, Qingwei Dai, Fusheng Pan. Effects of Different Stretching Routes on Microstructure and Mechanical Properties of AZ31B Magnesium Alloy Sheets[J]. J. Mater. Sci. Technol., 2015, 31(9): 935-940.

Figures/Tables 6

Schematic diagram for the sample taken from the extrusion sheets.

Optical microstructures of the as-received (a), Route A (b), Route B (c) and Route C (d) processed sheets in annealed conditions.

(0002) pole figures of the as-received (a), Route A (b), Route B (c) and Route C (d) processed sheets in annealed conditions.

True stress-strain curves of the as-received and stretched sheet in annealed conditions in ED (a) and TD (b).

Effects of different stretching routes on yield strength and ultimate tensile strength (a), fracture elongation and uniform elongation (b), n-value (c) and r-value (d).

Erichsen values of the as-received and Route A, Route B and Route C processed sheets in annealed conditions.

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