TY - JOUR
T1 - Electrical resistivity mapping of titanium and zirconium discs processed by high-pressure torsion for homogeneity and phase transformation evaluation
AU - Haraguchi, Rin
AU - Yoshimatsu, Yuuki
AU - Nagaoka, Takashi
AU - Arita, Makoto
AU - Edalati, Kaveh
AU - Horita, Zenji
N1 - Funding Information:
This study was supported in part by a Grant-in-Aid for Scientific Research (S) from the MEXT, Japan (No. 26220909). One of the authors (KE) thanks Kyushu University for the Qdai-Jump Research Grant (No. 28325) and the MEXT, Japan, for a Grant-in-Aid for Scientific Research (B) (No. 16H04539). The HPT process was carried out in the International Research Center on Giant Straining for Advanced Materials (IRC-GSAM) at Kyushu University.
Publisher Copyright:
© 2017, Springer Science+Business Media New York.
PY - 2017/6/1
Y1 - 2017/6/1
N2 - High-pressure torsion (HPT) was applied to discs of pure Ti and Zr under pressures of 2 and 6 GPa, and the evolution of electrical resistivity was investigated. The electrical resistivity increased with increasing the distance from the disc centre in both Ti and Zr, but the distribution of electrical resistivity became more homogenous with increasing the number of HPT turns, i.e. with increasing the shear strain. The electrical resistivity increased more significantly when Ti and Zr were processed under 6 GPa because of the formation of high-pressure ω phase. The distribution of hardness with distance from disc centre and number of HPT turns were basically similar to those of electrical resistivity distribution. In situ electrical resistivity measurements during heating confirmed that the ω-Zr phase was thermally more stable than the ω-Ti phase.
AB - High-pressure torsion (HPT) was applied to discs of pure Ti and Zr under pressures of 2 and 6 GPa, and the evolution of electrical resistivity was investigated. The electrical resistivity increased with increasing the distance from the disc centre in both Ti and Zr, but the distribution of electrical resistivity became more homogenous with increasing the number of HPT turns, i.e. with increasing the shear strain. The electrical resistivity increased more significantly when Ti and Zr were processed under 6 GPa because of the formation of high-pressure ω phase. The distribution of hardness with distance from disc centre and number of HPT turns were basically similar to those of electrical resistivity distribution. In situ electrical resistivity measurements during heating confirmed that the ω-Zr phase was thermally more stable than the ω-Ti phase.
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U2 - 10.1007/s10853-017-0916-x
DO - 10.1007/s10853-017-0916-x
M3 - Article
AN - SCOPUS:85013483738
SN - 0022-2461
VL - 52
SP - 6778
EP - 6788
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 11
ER -