Grain refining and mechanical properties of AZ31 alloy processed by accumulated extrusion bonding
作者： Tingzhuang Han , Guangsheng Huang , Qianyuan Deng , Guangang Wang , Bin Jiang
DOI: 10.1016/J.JALLCOM.2018.02.248
关键词:
摘要: Abstract In order to improve the strength and ductility of AZ31 magnesium alloy thin sheet with thickness 1.5 mm, an accumulated extrusion bonding (AEB) process was conducted for 1 2 passes at 473 K. Microstructure evolution mechanical properties were subsequently investigated. The results showed that interface bonded successfully a good quality due large strain induced by AEB process. {10–12} tensile twinning dominated deformation initial stage extrusion. As increasing, dynamic recrystallization (DRX) occurred further deformation. A fully DRXed microstructure observed in sizing band average grain size significantly reduced ∼1.4 μm. Grain growth after extruded exited from die. pass exhibited double-peak texture basal poles inclined normal direction (ND) towards (ED) similar intensity as-received sample. Due refinement strengthening, processed sample better comprehensive higher yield (169 MPa vs. 145 MPa), ultimate (336 MPa 385 MPa) fracture elongation (24.9% 28.0%) room temperature. However, sample, characteristic first This indicated increase number had no more effect on refining improving properties.
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