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Author:

Wu, Minbao (Wu, Minbao.) | Wei, Wu (Wei, Wu.) | Zuo, Rui (Zuo, Rui.) | Wen, Shengping (Wen, Shengping.) | Shi, Wei (Shi, Wei.) | Zhou, Xiaorong (Zhou, Xiaorong.) | Wu, Xiaolan (Wu, Xiaolan.) | Gao, Kunyuan (Gao, Kunyuan.) | Huang, Hui (Huang, Hui.) | Nie, Zuoren (Nie, Zuoren.) (Scholars:聂祚仁)

Indexed by:

SCIE

Abstract:

The hot compression experiment of homogenized Al-5.2Mg-0.6Mn-0.29Zn-0.16Er-0.12Zr alloy was carried out by the Gleeble-3500 thermal simulation testing system. The deformation behavior in temperatures of 350 similar to 500 celcius and deformation rates of 0.01 similar to 10 s(-1) was studied. The relationship between stress and strain rate and deformation temperature was analyzed. The constitutive equation of alloy high-temperature deformation was constructed by the Zener-Hollomon method, and the hot working diagram with the true strain of 0.2 and 0.5 was constructed according to the dynamic material model. The research results show that flow stress has a positive correlation with strain rate and a negative correlation with temperature. The steady flow stress during deformation can be described by a hyperbolic sinusoidal constitutive equation. Adding Er and Zr into Al-Mg alloy can not only refine grains and strengthen precipitation but also form a core-shell Al-3(Er, Zr) phase. In the deformation process, Al-3(Er, Zr) precipitates can pin dislocations and inhibit dynamic recrystallization (DRX). Dynamic recovery (DRV) is dominant during hot deformation. The mechanism of dynamic recovery is dislocation motion. At high temperatures, Al-3(Er, Zr) can also inhibit grain coarsening. The average hot deformation activation energy of the alloy is 203.7 kJ/mol. This high activation energy can be due to the pinning effect of Er and Zr precipitates. The processing map of the alloy was analyzed and combined with the observation of microstructure, the hot deformation instability zone of the alloy was determined, and the suitable process parameters for hot deformation were obtained, which were 450 similar to 480 degrees C, and the strain rate is 0.01 similar to 0.09 s(-1).

Keyword:

processing map constitutive equation thermal deformation behavior Al-Mg-Mn-Zn-Er-Zr alloy

Author Community:

  • [ 1 ] [Wu, Minbao]Beijing Univ Technol, Key Lab Adv Funct Mat Educ, Minist China, Beijing 100124, Peoples R China
  • [ 2 ] [Wei, Wu]Beijing Univ Technol, Key Lab Adv Funct Mat Educ, Minist China, Beijing 100124, Peoples R China
  • [ 3 ] [Zuo, Rui]Beijing Univ Technol, Key Lab Adv Funct Mat Educ, Minist China, Beijing 100124, Peoples R China
  • [ 4 ] [Wen, Shengping]Beijing Univ Technol, Key Lab Adv Funct Mat Educ, Minist China, Beijing 100124, Peoples R China
  • [ 5 ] [Wu, Xiaolan]Beijing Univ Technol, Key Lab Adv Funct Mat Educ, Minist China, Beijing 100124, Peoples R China
  • [ 6 ] [Gao, Kunyuan]Beijing Univ Technol, Key Lab Adv Funct Mat Educ, Minist China, Beijing 100124, Peoples R China
  • [ 7 ] [Huang, Hui]Beijing Univ Technol, Key Lab Adv Funct Mat Educ, Minist China, Beijing 100124, Peoples R China
  • [ 8 ] [Nie, Zuoren]Beijing Univ Technol, Key Lab Adv Funct Mat Educ, Minist China, Beijing 100124, Peoples R China
  • [ 9 ] [Shi, Wei]Inst Corros Sci & Technol, Guangzhou 510530, Peoples R China
  • [ 10 ] [Zhou, Xiaorong]Univ Manchester, Dept Mat, Manchester M13 9PL, England

Reprint Author's Address:

  • [Wei, Wu]Beijing Univ Technol, Key Lab Adv Funct Mat Educ, Minist China, Beijing 100124, Peoples R China;;[Nie, Zuoren]Beijing Univ Technol, Key Lab Adv Funct Mat Educ, Minist China, Beijing 100124, Peoples R China;;

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Source :

MATERIALS

Year: 2023

Issue: 2

Volume: 16

3 . 4 0 0

JCR@2022

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:26

Cited Count:

WoS CC Cited Count: 5

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 8

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