TY - JOUR
T1 - Sc/Zr microalloying on strength-corrosion performance synergy of wire-arc directed energy deposited Al-Mg
AU - Zhou, Yubin
AU - Qi, Zewu
AU - Cong, Baoqiang
AU - Jiang, Zihao
AU - Cai, Xinyi
AU - Li, Hongwei
AU - Zhang, Jiaqi
AU - Dong, Chaofang
AU - He, Xing
AU - Lin, Sanbao
AU - Cai, Xiaoyu
AU - Qi, Bojin
N1 - Publisher Copyright:
© 2024 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
PY - 2024
Y1 - 2024
N2 - WADED Al-Mg and Al-Mg-Sc-Zr aluminium alloy thin-wall components were produced. Heat treatment (350°C aging for 4 h) was further conducted. The effects of Sc/Zr addition on porosity, microstructure, mechanical properties and corrosion behaviour were investigated. With Sc/Zr adding, pore area fraction decreased from 0.208 to 0.005% and grain size decreased from 84.34 to 19.54 μm. In WADED Al-Mg-Sc-Zr component, microstructure showed refined equiaxed grains. Mechanical properties were improved with 360 MPa ultimate tensile strength (UTS), 185 MPa yield strength, and 23.31% elongation. After heat treatment, UTS increased to 388 MPa with good ductility (22.53%) maintained. The grain refinement and Al3(Sc, Zr) particles were the key factors for mechanical property improvement. The corrosion behaviour was improved with introduced Sc/Zr and further optimised after heat treatment. The corrosion exhibited layered characteristics due to the distribution of primary Al3(Sc, Zr) while minor-size secondary Al3(Sc, Zr) along grain boundaries improved the corrosion behaviour.
AB - WADED Al-Mg and Al-Mg-Sc-Zr aluminium alloy thin-wall components were produced. Heat treatment (350°C aging for 4 h) was further conducted. The effects of Sc/Zr addition on porosity, microstructure, mechanical properties and corrosion behaviour were investigated. With Sc/Zr adding, pore area fraction decreased from 0.208 to 0.005% and grain size decreased from 84.34 to 19.54 μm. In WADED Al-Mg-Sc-Zr component, microstructure showed refined equiaxed grains. Mechanical properties were improved with 360 MPa ultimate tensile strength (UTS), 185 MPa yield strength, and 23.31% elongation. After heat treatment, UTS increased to 388 MPa with good ductility (22.53%) maintained. The grain refinement and Al3(Sc, Zr) particles were the key factors for mechanical property improvement. The corrosion behaviour was improved with introduced Sc/Zr and further optimised after heat treatment. The corrosion exhibited layered characteristics due to the distribution of primary Al3(Sc, Zr) while minor-size secondary Al3(Sc, Zr) along grain boundaries improved the corrosion behaviour.
KW - Al-Mg-Sc-Zr alloy
KW - Wire-arc directed energy deposition
KW - corrosion behaviour
KW - heat treatment
KW - microstructure and mechanical properties
UR - https://www.scopus.com/pages/publications/85195209754
U2 - 10.1080/17452759.2024.2358981
DO - 10.1080/17452759.2024.2358981
M3 - 文章
AN - SCOPUS:85195209754
SN - 1745-2759
VL - 19
JO - Virtual and Physical Prototyping
JF - Virtual and Physical Prototyping
IS - 1
M1 - e2358981
ER -