Uneven microstructure in ZK60 alloy as a core of AZ31/ZK60 composite rods

被引：5
作者：
Chang, L. L. [1 ]
Su, X. J. [1 ]
Qin, J. L. [1 ]
机构：
[1] Shandong Univ, Sch Mat Sci & Engn, Jinan 250061, Shandong, Peoples R China
来源：
MATERIALS LETTERS | 2022年 / 325卷
关键词：
Metallic composites; Microstructure; Recrystallization; EMPIRICAL MODE DECOMPOSITION; STRESS-STRAIN CURVE; STEEL;
D O I：
10.1016/j.matlet.2022.132666
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
AZ31/ZK60 bimetal rods were fabricated via co-extrusion of hybrid billets with ZK60 core prepared by different styles. Uneven microstructures were revealed in ZK60 core of AZ31/ZK60 composite rods prepared by pouring melt (ZK60-melt) into AZ31 sleeve and casting to be ingots to fit AZ31 sleeve (ZK60-ingot) followed by coextrusion. Compared with the microstructure composed of equiaxed coarse and fine grains in ZK60-melt after co-extrusion, a mixed grain structure with large elongated grains and fine equiaxed grains was observed in ZK60ingot core in the composite rod. During aging at 180 degrees C for 12 h abnormal grain growth (AGG) was revealed in ZK60-melt core, but the uneven structure in ZK60-ingot remained thermally stable. Mechanical properties of AZ31/ZK60 composite rods with both ZK60-melt and ZK60-ingot cores were improved significantly by aging.
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页数：8
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