TY - JOUR
T1 - Ultrafine spherulite Mg alloy with high yield strength
AU - Matsushita, Masafumi
AU - Masuda, Kohtaro
AU - Waki, Ryohei
AU - Ohfuji, Hiroaki
AU - Yamasaki, Michiaki
AU - Kawamura, Yoshihito
AU - Higo, Yuji
N1 - Funding Information:
This research was supported by Grant-in-Aid for Scientific Research (No. 16K06706 ). The starting material was provided by the support of Grant-in-Aid for Scientific Research on innovative areas “ Synchronised LPSO ” (No. 23109007 ) from MEXT /JSPS, Japan. The “Grant for Research Unit of Materials Science under Ultra-High Pressure” from Ehime University also supported HPHT treatments for this research. The HPHT treatments were conducted at the Premier Institute for Ultra-High Pressure Science (PRIUS) at Ehime University (Proposal No. 2018-D02 , 2017-D04 , 2016-D04 ). The elastic measurements were realized with the approval of the Japan Synchrotron Radiation Research Institute ( JASRI ) (Proposal No. 2017B1274 ). A part of vickers hardness test was supported by JKA (No. 2018 M128 ). The authors acknowledge Professor Manabu Takahashi and Mr. Daiki Yamauchi at Ehime University for their technical help and discussion for compression testing. And nano-indentation testing were realized in Nissan Arc, Ltd.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/5/5
Y1 - 2019/5/5
N2 - Under high-temperature and high-pressure conditions, the long-period stacking-ordered structure in Mg85Y9Zn6 transforms to a dual-phase structure consisting of a hexagonal close-packed lattice and a face-centered cubic lattice. After further solidification at high-pressure, unique ultrafine microstructures are formed. The alloy recovered after subjected at 10 GPa and 973 K exhibited a fine lamella structure, and a 0.2% proof stress (σ0.2) of 480 MPa obtained by the compression test. Further the alloy recovered after subjected at 10 GPa and 1273 K, a unique spherulite structure were formed, and its σ0.2 improved to 780 MPa.
AB - Under high-temperature and high-pressure conditions, the long-period stacking-ordered structure in Mg85Y9Zn6 transforms to a dual-phase structure consisting of a hexagonal close-packed lattice and a face-centered cubic lattice. After further solidification at high-pressure, unique ultrafine microstructures are formed. The alloy recovered after subjected at 10 GPa and 973 K exhibited a fine lamella structure, and a 0.2% proof stress (σ0.2) of 480 MPa obtained by the compression test. Further the alloy recovered after subjected at 10 GPa and 1273 K, a unique spherulite structure were formed, and its σ0.2 improved to 780 MPa.
KW - High pressure synthesis
KW - Mg alloy
KW - Spherulite
KW - Yield strength
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U2 - 10.1016/j.jallcom.2019.01.080
DO - 10.1016/j.jallcom.2019.01.080
M3 - Article
AN - SCOPUS:85060225598
SN - 0925-8388
VL - 784
SP - 1284
EP - 1289
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -