Achieving High Yield Strength and Ductility in As-Extruded Mg-0.5Sr Alloy by High Mn–Alloying
1
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
2
School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
3
National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China
4
School of Materials and Energy, Southwest University, Chongqing 400715, China
*
Author to whom correspondence should be addressed.
Materials 2020, 13(18), 4176; https://doi.org/10.3390/ma13184176
Received: 6 August 2020
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Revised: 17 September 2020
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Accepted: 17 September 2020
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Published: 19 September 2020
The effect of Mn on the microstructure and mechanical properties of as-extruded Mg-0.5Sr alloy were discussed in this work. The results showed that high Mn alloying (2 wt.%) could significantly improve the mechanical properties of the alloys, namely, the tensile and compressive yield strength. The grain size of as-extruded Mg-0.5Sr alloys significantly was refined from 2.78 μm to 1.15 μm due to the pinning effect by fine α-Mn precipitates during the extrusion. Moreover, it also showed that the tensile yield strength and the compressive yield strength of Mg-0.5Sr-2Mn alloy were 32 and 40 percent age higher than those of Mg-0.5Sr alloy, respectively. Moreover, the strain hardening behaviors of the Mg-0.5Sr-2Mn alloy were discussed, which proved that a large number of small grains and texture have an important role in improving mechanical properties.
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Keywords:
Mg alloys; extrusion; microstructure; mechanical properties
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MDPI and ACS Style
Zhou, S.; He, X.; Peng, P.; Liu, T.; Sheng, G.; Tang, A.; Pan, F. Achieving High Yield Strength and Ductility in As-Extruded Mg-0.5Sr Alloy by High Mn–Alloying. Materials 2020, 13, 4176. https://doi.org/10.3390/ma13184176
AMA Style
Zhou S, He X, Peng P, Liu T, Sheng G, Tang A, Pan F. Achieving High Yield Strength and Ductility in As-Extruded Mg-0.5Sr Alloy by High Mn–Alloying. Materials. 2020; 13(18):4176. https://doi.org/10.3390/ma13184176
Chicago/Turabian StyleZhou, Shibo, Xiongjiangchuan He, Peng Peng, Tingting Liu, Guangmin Sheng, Aitao Tang, and Fusheng Pan. 2020. "Achieving High Yield Strength and Ductility in As-Extruded Mg-0.5Sr Alloy by High Mn–Alloying" Materials 13, no. 18: 4176. https://doi.org/10.3390/ma13184176
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