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Microstructure evolution and mechanical properties of the ZM61 alloy sheets under different pre-rolling and high strain rate rolling temperatures

Published online by Cambridge University Press:  24 June 2020

Hongge Yan ,
Qin Wu ,
Jihua Chen ,
Weijun Xia ,
Min Song ,
Bin Su  and
Jiang Wu
Hongge Yan
Affiliation:
School of Materials Science and Engineering, Hunan University, Changsha410082, PR China Hunan Provincial Key Laboratory of Spray Deposition Technology & Application, Hunan University, Changsha410082, PR China
Qin Wu*
Affiliation:
School of Materials Science and Engineering, Hunan University, Changsha410082, PR China Hunan Provincial Key Laboratory of Spray Deposition Technology & Application, Hunan University, Changsha410082, PR China
Jihua Chen*
Affiliation:
School of Materials Science and Engineering, Hunan University, Changsha410082, PR China Hunan Provincial Key Laboratory of Spray Deposition Technology & Application, Hunan University, Changsha410082, PR China
Weijun Xia
Affiliation:
School of Materials Science and Engineering, Hunan University, Changsha410082, PR China Hunan Provincial Key Laboratory of Spray Deposition Technology & Application, Hunan University, Changsha410082, PR China
Min Song
Affiliation:
State Key Laboratory of Powder Metallurgy, Central South University, Changsha410083, PR China
Bin Su
Affiliation:
School of Materials Science and Engineering, Hunan University, Changsha410082, PR China Hunan Provincial Key Laboratory of Spray Deposition Technology & Application, Hunan University, Changsha410082, PR China
Jiang Wu
Affiliation:
School of Materials Science and Engineering, Hunan University, Changsha410082, PR China Hunan Provincial Key Laboratory of Spray Deposition Technology & Application, Hunan University, Changsha410082, PR China
*
a)Address all correspondence to these authors. e-mail: 15074991154@163.com
b)e-mail: jihuachen2005@163.com
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Abstract

The microstructure evolution, dynamic recrystallization (DRX) and precipitation of the ZM61 alloy sheets prepared with different rolling conditions were studied. The DRX grain sizes (dDRX) at four high strain rate rolling (HSRR) temperatures (275–350 °C) are 1.9, 2.3, 2.6 and 3.1 μm, respectively, while the DRX volume fractions (fVDRX) are 69, 73, 76 and 82%, respectively. 300 °C is selected as the optimal HSRR temperature. The dDRX and fVDRX of the alloys prepared by pre-rolling (PR) at 300 °C + HSRR are 1.0 μm and 91%, respectively. The PR treatment does not change the types of the precipitates but promotes the precipitation. The tensile strength (UTS) of 369 MPa and yield strength (YS) of 261 MPa can be achieved by HSRR at 300 °C, while a further increase in both UTS and YS can be obtained by PR treatment.

Keywords

transmission electron microscope (TEM)Mgmicrostructure
Type
Article
Information
Journal of Materials Research , Volume 35 , Issue 14 , 28 July 2020 , pp. 1817 - 1824
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Copyright
Copyright © Materials Research Society 2020

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