TY - JOUR
T1 - Strengthening of A2024 alloy by high-pressure torsion and subsequent aging
AU - Mohamed, Intan Fadhlina
AU - Masuda, Takahiro
AU - Lee, Seungwon
AU - Edalati, Kaveh
AU - Horita, Zenji
AU - Hirosawa, Shoichi
AU - Matsuda, Kenji
AU - Terada, Daisuke
AU - Omar, Mohd Zaidi
N1 - Funding Information:
IFM thanks Universiti Kebangsaan Malaysia (the National University of Malaysia) for awarding Young Researcher Encouragement Grant (GGPM-2016-029) and the Ministry of Higher Education Malaysia for the Fundamental Research Grant Scheme (FRGS/1/2016/TK03/UKM/02/4). IFM also gratefully acknowledges SIRIM Berhad Company of Malaysian Government for a scholarship. This work was supported in part by Japan Science and Technology Agency (JST) under Collaborative Research Based on Industrial Demand “Heterogeneous Structure Control: Towards Innovative Development of Metallic Structural Materials”, in part by the Light Metals Educational Foundation of Japan, and in part by a Grant-in-Aid for Scientific Research (S) from the MEXT, Japan (No. 26220909). 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 Elsevier B.V.
PY - 2017/9/17
Y1 - 2017/9/17
N2 - An age-hardenable A2024 alloy is processed by high-pressure torsion (HPT) for grain refinement and further aged for fine precipitation. The HPT is conducted under an applied pressure of 6 GPa for 0.75, 1 and 5 turns with a rotation speed of 1 rpm at room temperature and this results in a significant grain size reduction to a grain size of ~ 240 ± 80 nm. The hardness sharply increases with imposing strain at an early stage but level off after 5 turns. Further aging at temperatures of 373 K and 423 K leads to extra hardening above the elevated hardness of the HPT-processed condition. Components contributing to the strengthening were evaluated in terms of grain refinement and fine precipitation including the contributions from dislocation accumulation and solid solution. In this study, a conclusion is reached such that simultaneous strengthening due to grain refinement and fine precipitation is achieved by application of HPT processing and subsequent aging.
AB - An age-hardenable A2024 alloy is processed by high-pressure torsion (HPT) for grain refinement and further aged for fine precipitation. The HPT is conducted under an applied pressure of 6 GPa for 0.75, 1 and 5 turns with a rotation speed of 1 rpm at room temperature and this results in a significant grain size reduction to a grain size of ~ 240 ± 80 nm. The hardness sharply increases with imposing strain at an early stage but level off after 5 turns. Further aging at temperatures of 373 K and 423 K leads to extra hardening above the elevated hardness of the HPT-processed condition. Components contributing to the strengthening were evaluated in terms of grain refinement and fine precipitation including the contributions from dislocation accumulation and solid solution. In this study, a conclusion is reached such that simultaneous strengthening due to grain refinement and fine precipitation is achieved by application of HPT processing and subsequent aging.
UR - http://www.scopus.com/inward/record.url?scp=85026897003&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85026897003&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2017.07.083
DO - 10.1016/j.msea.2017.07.083
M3 - Article
AN - SCOPUS:85026897003
SN - 0921-5093
VL - 704
SP - 112
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 -