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Deformation behavior of an Al-Cu-Mg-Mn-Zr alloy during hot compression

Li, Yao ; Liu, Zhiyi ; Lin, Lianghua ; Peng, Jiangtao ; Ning, Ailin

Journal of Materials Science, June 1, 2011, Vol.46(11), p.3708(8) [Tạp chí có phản biện]

ISSN: 0022-2461 ; DOI: 10.1007/s10853-010-5143-7

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  • Nhan đề:
    Deformation behavior of an Al-Cu-Mg-Mn-Zr alloy during hot compression
  • Tác giả: Li, Yao ; Liu, Zhiyi ; Lin, Lianghua ; Peng, Jiangtao ; Ning, Ailin
  • Chủ đề: Alloys ; Activation Energy ; Zirconium ; Transmission Electron Microscopes ; Specialty Metals Industry ; Precipitation (Meteorology)
  • Là 1 phần của: Journal of Materials Science, June 1, 2011, Vol.46(11), p.3708(8)
  • Mô tả: Deformation behavior of an Al-Cu-Mg-Mn-Zr alloy during hot compression was characterized in present work by high-temperature testing and transmission electron microscope (TEM) studies. The true stress-true strain curves exhibited a peak stress at a critical stain. The peak stress decreased with increasing deformation temperature and decreasing strain rate, which can be described by Zener-Hollomon (Z) parameter in hyperbolic sine function with the deformation activation energy 277.8 kJ/mol. The processing map revealed the existence of an optimum hot-working regime between 390 and 420[degrees]C, under strain rates ranging from 0.1 to 1 [s.sup.-1]. The main softening mechanism of the alloy was dynamic recovery at high lnZ value; continuous dynamic recrystallization (DRX) occurred as deformed at low lnZ value. The dynamic precipitation of [Al.sub.3]Zr and [Al.sub.20][Cu.sub.2][Mn.sub.3] dispersoids during hot deformation restrained DRX and increased the hot deformation activation energy of the alloy.
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0022-2461 ; DOI: 10.1007/s10853-010-5143-7

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