TY - JOUR
T1 - Multi-pass high-pressure sliding (MP-HPS) for grain refinement and superplasticity in metallic round rods
AU - Tang, Yongpeng
AU - Sumikawa, Kosei
AU - Takizawa, Yoichi
AU - Yumoto, Manabu
AU - Otagiri, Yoshiharu
AU - Horita, Zenji
N1 - Funding Information:
This work was conducted under a project subsidized by the New Energy and Industrial Technology Development Organization (NEDO) / The Strategic Core Technology Advancement Program. In addition, this work was partly supported by a Grant-in-Aid for Scientific Research (S) from the MEXT , Japan (No. 26220909 ). The HPS process was carried out in the International Research Center on Giant Straining for Advanced Materials (IRC-GSAM) at Kyushu University.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/3/4
Y1 - 2019/3/4
N2 - In this study, the multi-pass high-pressure sliding (MP-HPS) process was applied for grain refinement of rods with an upsized dimension. To achieve a homogeneous microstructure throughout the cross section of the rod, the rod samples are rotated with 60° around the longitudinal axis (MP-HPS-R) or are shifted upward and downward from the mid-height on the cross-sectional plane (MP-HPS-S). A homogeneous microstructure with an average grain size of ~ 200 nm for an Al-3 wt%Mg-0.2 wt%Sc alloy and ~ 160 nm for Inconel 718 were developed through both of the MP-HPS processes. The rods of the Al-3 wt%Mg-0.2 wt%Sc alloy and Inconel 718 after MP-HPS processing exhibited superplasticity with total elongations more than 600% and 400%, respectively. A finite-element method (FEM) was used to simulate the magnitude of the strain including its distribution on the cross section of the rod through processing by MP-HPS-R. It was demonstrated that microstructural homogeneity was developed in the rod processed by the MP-HPS-R but inhomogeneity was left by the MP-HPS-S.
AB - In this study, the multi-pass high-pressure sliding (MP-HPS) process was applied for grain refinement of rods with an upsized dimension. To achieve a homogeneous microstructure throughout the cross section of the rod, the rod samples are rotated with 60° around the longitudinal axis (MP-HPS-R) or are shifted upward and downward from the mid-height on the cross-sectional plane (MP-HPS-S). A homogeneous microstructure with an average grain size of ~ 200 nm for an Al-3 wt%Mg-0.2 wt%Sc alloy and ~ 160 nm for Inconel 718 were developed through both of the MP-HPS processes. The rods of the Al-3 wt%Mg-0.2 wt%Sc alloy and Inconel 718 after MP-HPS processing exhibited superplasticity with total elongations more than 600% and 400%, respectively. A finite-element method (FEM) was used to simulate the magnitude of the strain including its distribution on the cross section of the rod through processing by MP-HPS-R. It was demonstrated that microstructural homogeneity was developed in the rod processed by the MP-HPS-R but inhomogeneity was left by the MP-HPS-S.
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U2 - 10.1016/j.msea.2019.01.071
DO - 10.1016/j.msea.2019.01.071
M3 - Article
AN - SCOPUS:85060735613
SN - 0921-5093
VL - 748
SP - 108
EP - 118
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
ER -