| Hot deformation behavior of Mg-7.22Gd-4.84Y-1.26Nd-0.58Zr magnesium alloy | |
| 其他题名 | Hot 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 | |
| 发表期刊 | RARE METALS
 |
| ISSN | 1001-0521 |
| 卷号 | 30期号:1页码:87-93 |
| 摘要 | The 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%. |
| 其他摘要 | The 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% |
| 关键词 | ELEVATED-TEMPERATURES FLOW-STRESS STRAIN-RATE CORROSION STEEL PREDICTION magnesium alloys rare earth elements microstructure activation energy deformation hot working |
| 收录类别 | CSCD |
| 语种 | 英语 |
| 资助项目 | [National Key Basic Research and Development Program] |
| CSCD记录号 | CSCD:4121547 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/154437 |
| 专题 | 中国科学院金属研究所 |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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