Effect of rolling route on microstructure and properties of ZK60 magnesium alloy sheets

doi:10.13251/j.issn.0254-6051.2020.02.007

Abstract

Abstract:

Rolled and heat treated ZK60 magnesium alloy sheets were re-rolled for nine passes at 250 ℃ by different routes. Microstructure, room temperature tensile properties, fracture morphology and grains preferred orientation of ZK60 magnesium alloys after re-rolling were researched by means of optical microscopy, electronic universal testing machine, SEM and XRD. The results indicate that the rolling route has no obvious effect on the grain size of ZK60 magnesium alloy sheets, but the reduction has a great influence on the twin forming in the structure of magnesium alloy. The change of rolling route has greater effect on anisotropy and mechanical properties of ZK60 magnesium alloy sheet. The ZK60 magnesium alloy sheet rolled under the route of cross+45° has weak anisotropy and good comprehensive mechanical properties, its yield strength, tensile strength and elongation reach 244.31 MPa, 371.14 MPa and 25.46% respectively. The cross+45° rolling has a significant effect on the grains preferred orientation of ZK60 magnesium alloy sheets, which can improve the preferred grain orientation and anisotropy and the plastic deformation properties of ZK60 magnesium alloy.

Key words: ZK60 magnesium alloy, rolling routes, microstructure, mechanical properties, grain orientation

CLC Number:

TG146

Li Luobin, Jiang Peng, Ren Guangmeng, Zhang Ke, Wang Hao, Ran Ruiying, Zhang Yi. Effect of rolling route on microstructure and properties of ZK60 magnesium alloy sheets[J]. HTM, 2020, 45(2): 36-41.

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