TY - GEN
T1 - Influence of high-pressure torsion on formation/destruction of nano-sized spinodal structures
AU - Alhamidi, Ali
AU - Edalati, Kaveh
AU - Horita, Zenji
N1 - Funding Information:
One of the authors (AA) thanks to the University of Sultan Ageng Tirtayasa for financial supporting at International Conference. This work was supported in part by the Light Metals Educational Foundation of Japan, in part by a Grant-in-Aid for Scientific Research from the MEXT, Japan, in Innovative Areas "Bulk Nanostructured Metals".
Publisher Copyright:
© 2018 Author(s).
PY - 2018/4/3
Y1 - 2018/4/3
N2 - The microstructures and hardness of Al - 30 mol.% Zn are investigated after processing by high-pressure torsion (HPT) for different numbers of revolutions, N = 1, 3, 10 or 25, as well as after post-HPT annealing at different temperatures, T = 373 K, 473 K, 573 K and 673 K. It was found that a work softening occurs by decreasing the grain size to the submicrometer level and increasing the fraction of high-angle boundaries. As a result of HPT processing, a complete decomposition of supersaturated solid solution of Zn in Al occurs and the spinodal structure is destroyed. This suggests that softening of the Al-Zn alloys after HPT is due to the decomposition of the supersaturated solid solution and destruction of spinodal decomposition. After post-HPT annealing, ultrafine-grained Al-Zn alloys show an unusual mechanical properties and its hardness increased to 187 HV. Microstructural analysis showed that the high hardness after post-HPT annealing is due to the formation of spinodal structures.
AB - The microstructures and hardness of Al - 30 mol.% Zn are investigated after processing by high-pressure torsion (HPT) for different numbers of revolutions, N = 1, 3, 10 or 25, as well as after post-HPT annealing at different temperatures, T = 373 K, 473 K, 573 K and 673 K. It was found that a work softening occurs by decreasing the grain size to the submicrometer level and increasing the fraction of high-angle boundaries. As a result of HPT processing, a complete decomposition of supersaturated solid solution of Zn in Al occurs and the spinodal structure is destroyed. This suggests that softening of the Al-Zn alloys after HPT is due to the decomposition of the supersaturated solid solution and destruction of spinodal decomposition. After post-HPT annealing, ultrafine-grained Al-Zn alloys show an unusual mechanical properties and its hardness increased to 187 HV. Microstructural analysis showed that the high hardness after post-HPT annealing is due to the formation of spinodal structures.
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U2 - 10.1063/1.5030283
DO - 10.1063/1.5030283
M3 - Conference contribution
AN - SCOPUS:85045649240
T3 - AIP Conference Proceedings
BT - Proceedings of the 3rd International Conference on Materials and Metallurgical Engineering and Technology, ICOMMET 2017
A2 - Hidayat, Mas Irfan P.
PB - American Institute of Physics Inc.
T2 - 3rd International Conference on Materials and Metallurgical Engineering and Technology: Advancing Innovation in Materials Science, Technology and Applications for Sustainable Future, ICOMMET 2017
Y2 - 30 October 2017 through 31 October 2017
ER -