TY - JOUR
T1 - Microstructures and the Mechanical Properties of the Al–Li–Cu Alloy Strengthened by the Combined Use of Accumulative Roll Bonding and Aging
AU - Tang, Yongpeng
AU - Hirosawa, Shoichi
AU - Saikawa, Seiji
AU - Matsuda, Kenji
AU - Lee, Seungwon
AU - Horita, Zenji
AU - Terada, Daisuke
N1 - Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2020/1/1
Y1 - 2020/1/1
N2 - Herein, the age-hardening behavior of the severely deformed and then artificially aged A2099 Al–Li–Cu alloy is investigated by Vickers hardness test, tensile test, and transmission electron microscopy (TEM). The combined processes of accumulative roll bonding (ARB) and aging treatment at 373 K for 2419 ks result in the highest hardness (≈190 HV) for the 5-cycled ARB sample with an age hardenability of 37 ± 2 HV. For the 2-cycled ARB sample with aging treatment, the ultimate tensile strength and elongation to failure reach 553 MPa and 7%, which are greater than those of the ARB sample without aging treatment (i.e., 442 MPa and 1%). The corresponding TEM microstructures suggest that the refined δ′–Al3Li particles formed by spinodal decomposition are responsible not only for higher hardness and strength but also for the optimized strength–ductility balance. Therefore, our proposed strategy, i.e., “take advantage of spinodal decomposition,” is regarded as a convincing approach to induce nanosized precipitates within ultrafine grains for optimizing the strength–ductility balance.
AB - Herein, the age-hardening behavior of the severely deformed and then artificially aged A2099 Al–Li–Cu alloy is investigated by Vickers hardness test, tensile test, and transmission electron microscopy (TEM). The combined processes of accumulative roll bonding (ARB) and aging treatment at 373 K for 2419 ks result in the highest hardness (≈190 HV) for the 5-cycled ARB sample with an age hardenability of 37 ± 2 HV. For the 2-cycled ARB sample with aging treatment, the ultimate tensile strength and elongation to failure reach 553 MPa and 7%, which are greater than those of the ARB sample without aging treatment (i.e., 442 MPa and 1%). The corresponding TEM microstructures suggest that the refined δ′–Al3Li particles formed by spinodal decomposition are responsible not only for higher hardness and strength but also for the optimized strength–ductility balance. Therefore, our proposed strategy, i.e., “take advantage of spinodal decomposition,” is regarded as a convincing approach to induce nanosized precipitates within ultrafine grains for optimizing the strength–ductility balance.
KW - Al–Li–Cu alloys
KW - accumulative roll bonding
KW - concurrent strengthening
KW - spinodal decomposition
UR - http://www.scopus.com/inward/record.url?scp=85071276058&partnerID=8YFLogxK
U2 - 10.1002/adem.201900561
DO - 10.1002/adem.201900561
M3 - 学術論文
AN - SCOPUS:85071276058
SN - 1438-1656
VL - 22
JO - Advanced Engineering Materials
JF - Advanced Engineering Materials
IS - 1
M1 - 1900561
ER -