Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 819, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2021.141484
Keywords
Magnesium alloys; Deformation mechanisms; Weak texture; Grain size; Twinning; < c plus a > dislocations
Categories
Funding
- National Science Foundation (NSFDMR) [1709865]
- Department of Energy National Energy Technology Laboratory [DEEE0003583]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1709865] Funding Source: National Science Foundation
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The newly developed Mg-2Zn-0.3Ca-0.2Ce-0.1Mn (ZXEM2000) wrought alloy exhibits exceptionally high tensile ductility. The high ductility of ZXEM2000 is attributed to weaker texture, fine grain size, reduced twinning, and increased cross-slip frequency of c +a dislocation. These findings provide important insights for improving ductility of magnesium alloys in future alloy design and development.
A newly developed Mg-2Zn-0.3Ca-0.2Ce-0.1Mn (in weight %, ZXEM2000) wrought alloy exhibits an exceptionally high tensile ductility (29% +/- 1.4% tensile elongation) along the rolling direction at room temperature. In this work, we investigated the fundamental plastic deformation mechanisms that can contribute to the high ductility of ZXEM2000. Scanning electron microscopy and transmission electron microscopy were carried out at selected strain levels to characterize the microstructural evolution. Compared with the deformed microstructures from the hot-rolled pure Mg and Mg-3Al-1Zn alloy at similar conditions, our results revealed that the high ductility of ZXEM2000 could be attributed to four key factors: weaker texture, fine grain size, reduced twinning, and increased cross-slip frequency of c +a dislocation. These direct observations offer a key insight into improving ductility of magnesium alloys for future alloy design and development.
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