Journal
MATERIALS
Volume 13, Issue 18, Pages -Publisher
MDPI
DOI: 10.3390/ma13184176
Keywords
Mg alloys; extrusion; microstructure; mechanical properties
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Funding
- National Natural Science Foundation of China [51901028, 51971042, 51531002, 51474043]
- National Key Research and Development Program of China [2016YFB0301100]
- Natural Science Foundation of Chongqing [cstc2017jcyjBX0040, cstc2018jcyjAX0070]
- Chongqing Academician Special Fund [cstc2018jcyj-yszxX0007]
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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 mu m to 1.15 mu m due to the pinning effect by fine alpha-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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