TY - GEN
T1 - Enhancement of Mechanical Properties of Rolled AZ31 Alloy by Utilizing Ultrasonic Nano-crystalline Surface Modification (UNSM) Treatment and Heat Treatment
AU - Kim, Hyun Ji
AU - Jo, Sumi
AU - Amanov, Auezhan
AU - Park, Sung Hyuk
N1 - Publisher Copyright:
© The Minerals, Metals & Materials Society 2024.
PY - 2024
Y1 - 2024
N2 - Mg alloysMagnesium alloys (Mg alloys) have great potential as lightweight structural materials due to their low density, but their application is limited due to lower mechanical propertiesMechanical Properties compared to other lightweight alloys. The Ultrasonic Nano-crystalline Surface ModificationUltrasonic Nano-Crystalline Surface Modification (UNSM) (UNSM) technique, which induces severe plastic deformationPlastic deformation on the material surface using ultrasonic impacts, can result in a gradient microstructureGradient microstructure with a refined surface consisting of nano-sized grains, and an intermediate microstructure with residual strain, ultimately enhancing mechanical properties. While the nano-crystalline surface contributes to improved strength and ductility, the residual strain in the intermediate microstructureMicrostructure brings about a significant reduction in ductility. However, the residual strain can be beneficial for both strength and ductility through recovery and recrystallizationRecrystallization, achieved through an appropriate annealing treatment. In this study, we applied the UNSMUltrasonic Nano-Crystalline Surface Modification (UNSM)-treatment, followed by subsequent annealing at 200 °C, to a homogenized rolled AZ31 alloyAZ31 alloy to simultaneously improve strength and ductility by generating a gradient microstructureGradient microstructure.
AB - Mg alloysMagnesium alloys (Mg alloys) have great potential as lightweight structural materials due to their low density, but their application is limited due to lower mechanical propertiesMechanical Properties compared to other lightweight alloys. The Ultrasonic Nano-crystalline Surface ModificationUltrasonic Nano-Crystalline Surface Modification (UNSM) (UNSM) technique, which induces severe plastic deformationPlastic deformation on the material surface using ultrasonic impacts, can result in a gradient microstructureGradient microstructure with a refined surface consisting of nano-sized grains, and an intermediate microstructure with residual strain, ultimately enhancing mechanical properties. While the nano-crystalline surface contributes to improved strength and ductility, the residual strain in the intermediate microstructureMicrostructure brings about a significant reduction in ductility. However, the residual strain can be beneficial for both strength and ductility through recovery and recrystallizationRecrystallization, achieved through an appropriate annealing treatment. In this study, we applied the UNSMUltrasonic Nano-Crystalline Surface Modification (UNSM)-treatment, followed by subsequent annealing at 200 °C, to a homogenized rolled AZ31 alloyAZ31 alloy to simultaneously improve strength and ductility by generating a gradient microstructureGradient microstructure.
KW - AZ31 alloy
KW - Gradient microstructure
KW - Heat treatment
KW - Ultrasonic Nano-crystalline Surface Modification (UNSM)
UR - http://www.scopus.com/inward/record.url?scp=85185715782&partnerID=8YFLogxK
U2 - 10.1007/978-3-031-50240-8_24
DO - 10.1007/978-3-031-50240-8_24
M3 - Conference contribution
AN - SCOPUS:85185715782
SN - 9783031502392
T3 - Minerals, Metals and Materials Series
SP - 111
EP - 115
BT - Magnesium Technology 2024
A2 - Leonard, Aeriel
A2 - Barela, Steven
A2 - Neelameggham, Neale R.
A2 - Miller, Victoria M.
A2 - Tolnai, Domonkos
PB - Springer Science and Business Media Deutschland GmbH
T2 - Magnesium Technology Symposium held at the TMS Annual Meeting and Exhibition, 2024
Y2 - 3 March 2024 through 7 March 2024
ER -