期刊
JOURNAL OF MATERIALS SCIENCE
卷 50, 期 22, 页码 7424-7436出版社
SPRINGER
DOI: 10.1007/s10853-015-9300-x
关键词
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资金
- National Natural Science Foundation of China [51105102, 51375111]
- National Science Foundation of the United States [DMR-1160966]
- European Research Council under ERC [267464-SPDMETALS]
- National Basic Research Program of China [2012CB934100]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1160966] Funding Source: National Science Foundation
An AZ31 magnesium alloy was processed by high-pressure torsion (HPT) at room temperature under an imposed pressure of 6.0 GPa. Microstructural analysis showed that the HPT processing introduced significant grain refinement with a reduction in grain size from similar to 35 mu m in the initial annealed condition to similar to 110 nm after ten turns of HPT. Microhardness measurements showed that a reasonable level of hardness homogeneity was achieved across the disk processed through ten turns. The results from tensile testing demonstrated that the ultrafine-grained (UFG) AZ31 alloy processed by HPT exhibits high ductility with a maximum elongation of similar to 400 % at the relatively low testing temperature of 423 K. The results confirm that the UFG AZ31 magnesium alloy processed by HPT through ten turns has a strong potential for use in micro-forming applications.
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