TY - JOUR
T1 - 轻质金属的发展和应用：高强铝合金和镁合金
AU - Junsheng, Wang
AU - Chengpeng, Xue
AU - Shuo, Wang
AU - Guangyuan, Tian
AU - Hui, Su
N1 - Publisher Copyright:
© 2023 Journal Office of Special Casting and Nonferrous Alloys. All rights reserved.
PY - 2023/2
Y1 - 2023/2
N2 - The influence of hierarchical aging temperature and time on the microstructure and properties of 7A85 a-luminum alloy panel was investigated by the mechanical property test and microstructure analysis. The results indicate that the precipitate phase in 7A85 aluminum alloy after single stage aging are mainly composed of Al2Cu phase, Mg2Zn11phase, and G.P. II region, which are semi-coherent with the a-Al matrix, showing excellent plasticity while maintaining high strength. The precipitates of two-stage aging are MMg2Zn11, Mg3.5Zn1.5, and MgZn2, and the strengthening mechanism is characterized by the semi-coherent lattice distortion strengthening between the G.P. II region or Mg2Zn11phase and the α-Al matrix, showing a rise of yield strength and hardness as well as descent of the plasticity. The precipitate phase is transformed into Mg2Zn11, MgZn2. and Al2CuMg phases as the aging process continues, where MgZn2is the major, and the lattice relationship between the MgZn2phase and the α-Al matrix is converted to incoherent completely,leading to a decline of strength, and continuous increase of plasticity under the influence of α-A1 matrix.
AB - The influence of hierarchical aging temperature and time on the microstructure and properties of 7A85 a-luminum alloy panel was investigated by the mechanical property test and microstructure analysis. The results indicate that the precipitate phase in 7A85 aluminum alloy after single stage aging are mainly composed of Al2Cu phase, Mg2Zn11phase, and G.P. II region, which are semi-coherent with the a-Al matrix, showing excellent plasticity while maintaining high strength. The precipitates of two-stage aging are MMg2Zn11, Mg3.5Zn1.5, and MgZn2, and the strengthening mechanism is characterized by the semi-coherent lattice distortion strengthening between the G.P. II region or Mg2Zn11phase and the α-Al matrix, showing a rise of yield strength and hardness as well as descent of the plasticity. The precipitate phase is transformed into Mg2Zn11, MgZn2. and Al2CuMg phases as the aging process continues, where MgZn2is the major, and the lattice relationship between the MgZn2phase and the α-Al matrix is converted to incoherent completely,leading to a decline of strength, and continuous increase of plasticity under the influence of α-A1 matrix.
KW - 7A85 Aluminum Alloy
KW - Aging Heat Treatment
KW - Mechanical Properties
KW - Microstructure
KW - Structure Panel
UR - http://www.scopus.com/inward/record.url?scp=85151537237&partnerID=8YFLogxK
U2 - 10.15980/j.tzzz.2023.02.001
DO - 10.15980/j.tzzz.2023.02.001
M3 - 文章
AN - SCOPUS:85151537237
SN - 1001-2249
VL - 43
SP - 145
EP - 152
JO - Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys
JF - Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys
IS - 2
ER -