TY - JOUR
T1 - Microstructure evolution and strengthening mechanisms of an additive friction stir deposited multi-layer Al-Mg-Sc-Zr alloy
AU - Zhang, Mingtao
AU - Jiang, Tao
AU - Xie, Yunfei
AU - Feng, Xiangnan
AU - Su, Yu
AU - Shen, Zhikang
AU - Sun, Zhonggang
AU - Xu, Yaxin
AU - Li, Wenya
N1 - Publisher Copyright:
© 2024 Elsevier B.V.
PY - 2024/11/5
Y1 - 2024/11/5
N2 - In recent years, additive friction stir deposition (AFSD) has emerged as a promising solid-based additive manufacturing method with applications with lightweight materials such as aluminum alloys. In this study, a three-layer Al-Mg-Sc-Zr alloy deposit was produced with AFSD. The mechanism of continuous dynamic recrystallization in the deposit was identified, revealing average grain sizes of 9.9 μm at the top and 8.8 μm at the bottom. The phase boundaries between micron-sized and nano-sized Al3Sc reinforced phase particles and the alloy matrix were studied which confirmed orientations of {1 1 1} Al∥{1 1 1} Al3Sc and [1 1 2] Al∥[1 1 2] Al3Sc. The yield strength of the deposit in the longitudinal direction reached 314 MPa (90 % of the substrate), and in the transverse direction was 343 MPa, equal to that of the substrate (342 MPa). Second-phase strengthening, dislocation strengthening, and solid solution strengthening affected significantly yield strength.
AB - In recent years, additive friction stir deposition (AFSD) has emerged as a promising solid-based additive manufacturing method with applications with lightweight materials such as aluminum alloys. In this study, a three-layer Al-Mg-Sc-Zr alloy deposit was produced with AFSD. The mechanism of continuous dynamic recrystallization in the deposit was identified, revealing average grain sizes of 9.9 μm at the top and 8.8 μm at the bottom. The phase boundaries between micron-sized and nano-sized Al3Sc reinforced phase particles and the alloy matrix were studied which confirmed orientations of {1 1 1} Al∥{1 1 1} Al3Sc and [1 1 2] Al∥[1 1 2] Al3Sc. The yield strength of the deposit in the longitudinal direction reached 314 MPa (90 % of the substrate), and in the transverse direction was 343 MPa, equal to that of the substrate (342 MPa). Second-phase strengthening, dislocation strengthening, and solid solution strengthening affected significantly yield strength.
KW - Additive friction stir deposition
KW - Al-Mg-Sc-Zr alloy
KW - Grain boundary strengthening
KW - Second-phase strengthening
UR - http://www.scopus.com/inward/record.url?scp=85199962520&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2024.175783
DO - 10.1016/j.jallcom.2024.175783
M3 - 文章
AN - SCOPUS:85199962520
SN - 0925-8388
VL - 1004
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 175783
ER -