Effects of Extrusion Ratio on Microstructure and Mechanical Property of ZA15 Zn Alloy Extruded at Lower Temperature

doi:10.12068/j.issn.1005-3026.2017.01.009

Abstract

Abstract: The effects of extrusion ratio on microstructures and mechanical properties of ZA15 Zn alloy extruded at 150℃ were investigated by microscopy and tensile test. The results showed that the tensile strength of the extruded ZA15 Zn alloy is improved with increasing of the extrusion ratio， but all are lower than 150MPa. And the tensile elongation remains about 160%~180%， which is the feature of room temperature superplasticity. This is mainly because the lamellar eutectoid microstructure composed of α+η phases formed by heat treatment is transformed into one consisting of the η matrix and small α phase particle with dispersive distribution through plastic deformation. It implies that the room temperature superplasticity can be obtained in the ZA15 Zn alloy manufactured by the common extrusion at lower temperatures， and the mechanical properties can be satisfied with the new standard of the ZA15 Zn alloy wire used to thermal spraying industry.

Key words: ZA15 Zn alloy, extrusion ratio, microstructure, mechanical property, backward extrusion

CLC Number:

TG146. 13

SUN Shi-neng， WANG Li-qing， REN Yu-ping， QIN Gao-wu. Effects of Extrusion Ratio on Microstructure and Mechanical Property of ZA15 Zn Alloy Extruded at Lower Temperature[J]. Journal of Northeastern University Natural Science, 2017, 38(1): 42-45.

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