skip to main content
Ngôn ngữ:
Giới hạn tìm kiếm: Giới hạn tìm kiếm: Dạng tài nguyên Hiển thị kết quả với: Hiển thị kết quả với: Chỉ mục

Retrogression and re-aging treatment of Al-9.99%Zn-1.72%Cu-2.5%Mg-0.13%Zr aluminum alloy

Feng, Chun ; Liu, Zhi-Yi ; Ning, Ai-Lin ; Liu, Yan-Bin ; Zeng, Su-Min

Transactions of Nonferrous Metals Society of China, 2006, Vol.16(5), pp.1163-1170 [Tạp chí có phản biện]

ISSN: 1003-6326 ; DOI: 10.1016/S1003-6326(06)60395-6

Toàn văn sẵn có

Trích dẫn Trích dẫn bởi
  • Nhan đề:
    Retrogression and re-aging treatment of Al-9.99%Zn-1.72%Cu-2.5%Mg-0.13%Zr aluminum alloy
  • Tác giả: Feng, Chun ; Liu, Zhi-Yi ; Ning, Ai-Lin ; Liu, Yan-Bin ; Zeng, Su-Min
  • Chủ đề: Al-Zn-Mg-Cu Alloy ; Retrogression ; Re-Aging ; Microstructure ; Mechanical Properties ; Stress Corrosion Cracking ; Engineering
  • Là 1 phần của: Transactions of Nonferrous Metals Society of China, 2006, Vol.16(5), pp.1163-1170
  • Mô tả: The effect of retrogression and re-aging(RRA) heat treatment on the microstructure and mechanical properties of a low frequency electromagnetic casting alloy as Al-9.99%Zn-1.72%Cu-2.5%Mg-0.13%Zr was investigated by tensile properties test, Vickers hardness, electrical conductivity test, DSC analysis, SEM and TEM observation. The results show that RRA heat treatment can improve the stress corrosion cracking(SCC) properties with retention of the high strength of T6 level. After preaging at 100 °C for 24 h, retrogression at 200 °C for 7 min, and then re-aging at 100 °C for 24 h, the alloy obtains tensile strength up to 795 MPa, yield strength up to 767 MPa, maintains 9.1% elongation, and electric conductivity of 35.6%IACS. TEM observation shows that the re-dissolution of GP zone and η′ phase in the early stage of regression leads to the decrease of hardness, then the increase in the volume fraction of η′ and η phases leads to the increase again in the peak value, and finally the general coarsening of all particles results in a softening of the alloy. Meanwhile it is found that the conventional T6 heat treatment as the preaging and re-aging regime is not the optimum regime to the RRA treatment of the high-zinc content super-high strength aluminum alloy.
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 1003-6326 ; DOI: 10.1016/S1003-6326(06)60395-6

Đang tìm Cơ sở dữ liệu bên ngoài...