TY - JOUR
T1 - Determination of α/β phase boundaries and mechanical characterization of Mg-Sc binary alloys
AU - Ogawa, Yukiko
AU - Ando, Daisuke
AU - Sutou, Yuji
AU - Yoshimi, Kyosuke
AU - Koike, Junichi
N1 - Funding Information:
This work was supported by KAKENHI ( 15H05549 ) and Tohoku University Division for International Advanced Research and Education ( DIARE ).
Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/7/18
Y1 - 2016/7/18
N2 - In this study, α(hcp)/β(bcc) phase boundaries of the Mg-Sc binary phase system were determined by Mg/Sc diffusion couple and conventional equilibrated alloy methods. It was confirmed that α/β phase boundaries exist in regions with a higher Mg content than those in reported diagram. The Mg-Sc alloy with a β single-phase showed tensile strength of 254 MPa and elongation of 25.4%. The tensile strength of the Mg-Sc alloy increased with increasing volume fraction of the α phase (fα) and the alloy with a fα of 34% showed high UTS of 310 MPa and elongation of 28.8%, properties which are better balanced than those of conventional Mg alloys. This improvement was suggested to be due to isotropic deformation of the β phase, small grain size and small c/a of the α phase.
AB - In this study, α(hcp)/β(bcc) phase boundaries of the Mg-Sc binary phase system were determined by Mg/Sc diffusion couple and conventional equilibrated alloy methods. It was confirmed that α/β phase boundaries exist in regions with a higher Mg content than those in reported diagram. The Mg-Sc alloy with a β single-phase showed tensile strength of 254 MPa and elongation of 25.4%. The tensile strength of the Mg-Sc alloy increased with increasing volume fraction of the α phase (fα) and the alloy with a fα of 34% showed high UTS of 310 MPa and elongation of 28.8%, properties which are better balanced than those of conventional Mg alloys. This improvement was suggested to be due to isotropic deformation of the β phase, small grain size and small c/a of the α phase.
KW - Magnesium alloys
KW - Mechanical characterization
KW - Phase diagram
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U2 - 10.1016/j.msea.2016.06.028
DO - 10.1016/j.msea.2016.06.028
M3 - Article
AN - SCOPUS:84975729768
VL - 670
SP - 335
EP - 341
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
ER -