Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 686, Issue -, Pages 26-33Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2017.01.012
Keywords
Magnesium alloys; Age hardening; Precipitation; EBSD; High-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM)
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Funding
- National Natural Science Foundation of China [51474043, 51531002]
- Ministry of Education of China [SRFDR20130191110018]
- Project Foundation of Chongqing University of Arts and Sciences [R2012CJ19]
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A precipitation hardenable Mg-3Gd-3Nd-0.6Zr alloy was designed by thermodynamic calculations firstly and then investigated by experiment. In the as cast alloy, the solution of Nd atoms into equilibrium Mg5Gd phase facilitated its formation and increased its lattice constant. After a two-step solution and a two-step aging treatment, the alloy showed remarkable age-hardening response, which was caused by the formation of massive fine beta(1) precipitates. It is quite possible that the beta(1) phase is a continuous solid solution with metastable Mg3Nd and Mg3Gd phases.
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