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Hot deformation behavior of Mg-7.22Gd-4.84Y-1.26Nd-0.58Zr magnesium alloy
Alternative TitleHot deformation behavior of Mg-7.22Gd-4.84Y-1.26Nd-0.58Zr magnesium alloy
Zhang Kui1; Ma Minglong1; Li Xinggang1; Li Yongjun1; Liang Lichao2; Bing Mengfen2
2011
Source PublicationRARE METALS
ISSN1001-0521
Volume30Issue:1Pages:87-93
AbstractThe behavior evolvement of Mg-7.22Gd-4.84Y-1.26Nd-0.58Zr (GWN751K) magnesium alloy during the hot deformation process was discussed. The flow stress behavior of the magnesium alloy over the strain rate range of 0.002 to 2.000 s(-1) and in the temperature range of 623 to 773 K was studied on a Gleeble-1500D hot simulator under the maximum deformation degree of 60%. The experimental results showed that the relationship between stress and strain was obviously affected by strain rate and deformation temperature. The flow stress of GWN751K magnesium alloy during high temperature deformation could be represented by the Zener-Hollomon parameter in the hyperbolic Arrhenius-type equation. The stress exponent n and deformation activation energy Q were evaluated by linear regression analysis. The stress exponent n was fitted to be 3.16. The hot deformation activation energy of the alloy during hot deformation was 230.03 kJ/mol. The microstructures of hot deformation were also influenced by strain rate and compression temperature strongly. It was found that the alloy could be extruded at 723 K with the mechanical properties of sigma(0.2) = 260 MPa, sigma(b) = 320 MPa, and delta = 18%.
Other AbstractThe behavior evolvement of Mg-7.22Gd-4.84Y-1.26Nd-0.58Zr (GWN751K) magnesium alloy during the hot deformation process was discussed. The flow stress behavior of the magnesium alloy over the strain rate range of 0.002 to 2.000 s~(-1) and in the temperature range of 623 to 773 K was studied on a Gleeble-1500D hot simulator under the maximum deformation degree of 60%. The experimental results showed that the relationship between stress and strain was obviously affected by strain rate and deformation temperature. The flow stress of GWN751K magnesium alloy during high temperature deformation could be represented by the Zener-Hollomon parameter in the hyperbolic Arrhenius-type equation. The stress exponent n and deformation activation energy Q were evaluated by linear regression analysis. The stress exponent n was fitted to be 3.16. The hot deformation activation energy of the alloy during hot deformation was 230.03 kJ/mol. The microstructures of hot deformation were also influenced by strain rate and compression temperature strongly. It was found that the alloy could be extruded at 723 K with the mechanical properties of σ0.2 = 260 MPa, σb = 320 MPa, and δ = 18%
KeywordELEVATED-TEMPERATURES FLOW-STRESS STRAIN-RATE CORROSION STEEL PREDICTION magnesium alloys rare earth elements microstructure activation energy deformation hot working
Indexed ByCSCD
Language英语
Funding Project[National Key Basic Research and Development Program]
CSCD IDCSCD:4121547
Citation statistics
Cited Times:11[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/154437
Collection中国科学院金属研究所
Affiliation1.Gen Res Institute Nonferrous Met, State Key Lab Nonferrous Met & Proc, Beijing 100088, Peoples R China
2.中国科学院金属研究所
Recommended Citation
GB/T 7714
Zhang Kui,Ma Minglong,Li Xinggang,et al. Hot deformation behavior of Mg-7.22Gd-4.84Y-1.26Nd-0.58Zr magnesium alloy[J]. RARE METALS,2011,30(1):87-93.
APA Zhang Kui,Ma Minglong,Li Xinggang,Li Yongjun,Liang Lichao,&Bing Mengfen.(2011).Hot deformation behavior of Mg-7.22Gd-4.84Y-1.26Nd-0.58Zr magnesium alloy.RARE METALS,30(1),87-93.
MLA Zhang Kui,et al."Hot deformation behavior of Mg-7.22Gd-4.84Y-1.26Nd-0.58Zr magnesium alloy".RARE METALS 30.1(2011):87-93.
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