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Materials Science and Technology Volume 34, 2018 - Issue 12
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Research Articles

Effects of Sn on microstructure and mechanical properties of as-rolled Mg–5Zn–1Mn alloy

Jiankun ZouSchool of Materials Science and Engineering, Hunan University, Changsha, People’s Republic of China;Hunan Provincial Key Laboratory of Spray Deposition Technology & Application, Hunan University, Changsha, People’s Republic of ChinaView further author information
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Hongge YanSchool of Materials Science and Engineering, Hunan University, Changsha, People’s Republic of China;Hunan Provincial Key Laboratory of Spray Deposition Technology & Application, Hunan University, Changsha, People’s Republic of ChinaCorrespondence[email protected]
View further author information
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Jihua ChenSchool of Materials Science and Engineering, Hunan University, Changsha, People’s Republic of China;Hunan Provincial Key Laboratory of Spray Deposition Technology & Application, Hunan University, Changsha, People’s Republic of ChinaView further author information
,
Weijun XiaSchool of Materials Science and Engineering, Hunan University, Changsha, People’s Republic of China;Hunan Provincial Key Laboratory of Spray Deposition Technology & Application, Hunan University, Changsha, People’s Republic of ChinaView further author information
,
Bin SuSchool of Materials Science and Engineering, Hunan University, Changsha, People’s Republic of China;Hunan Provincial Key Laboratory of Spray Deposition Technology & Application, Hunan University, Changsha, People’s Republic of ChinaView further author information
,
Yi LeiSchool of Materials Science and Engineering, Hunan University, Changsha, People’s Republic of ChinaView further author information
&
Qin WuSchool of Materials Science and Engineering, Hunan University, Changsha, People’s Republic of ChinaView further author information
 show all
Pages 1468-1479 | Received 23 Jan 2018, Accepted 26 Mar 2018, Published online: 18 Apr 2018
 
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ABSTRACT

Effects of Sn on microstructure and mechanical properties of Mg–5Zn–1Mn alloy subjected to high strain rate rolling (9.1 s-1), 300°C and 80% pass reduction are investigated. With higher Sn content, the dynamic recrystallisation (DRX) grain size gradually decreases due to the stronger pinning of nano-scale precipitates at grain boundaries and the DRX fraction first increases due to the enhanced effect on DRX by decreasing stacking fault energy and then decreases due to more precipitates at grain boundaries. Ultimate tensile strength (UTS) and elongation to rupture (Er) of as-rolled alloys increase and then decrease. Alloy with 0.9 mass% Sn exhibits the highest DRX fraction (95 vol.-%), the finer DRX grain size (1.22 µm), UTS of 358 MPa and Er of 20.4%.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The authors are grateful to the support of the Natural Science Foundation Project of China (51471066).

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