通过热压缩实验、组织分析同时结合热力学和动力学计算方法,对700℃超超临界锅炉材料GH4700镍基合金组织演变进行研究,结果表明:GH4700镍基合金具有较高的变形温度和应变速率敏感性,随着变形温度的下降和应变速率的增大,合金的流变应力迅速升高,其动态再结晶形核方式为典型的应变诱导晶界迁移形核;其热变形激活能及晶粒长大激活能分别为345.0948kJ/mol和252.05kJ/mol.
参考文献
| [1] | T. B. Gibbons .Superalloys in modern power generation applications[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2009(2):129-135. |
| [2] | C. Rae .Alloys by Design: modelling next generation superalloys[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2009(4):479-487. |
| [3] | M. Oktay Alniak;Fevzi Bedir .Hot forging behavior of nickel based superalloys under elevated temperatures[J].Materials & design,2010(3):1588-1592. |
| [4] | Bi, Z.;Zhang, M.;Dong, J.;Luo, K.;Wang, J. .A new prediction model of steady state stress based on the influence of the chemical composition for nickel-base superalloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2010(16/17):4373-4382. |
| [5] | H. Monajati;M. Jahazi;S. Yue .Deformation Characteristics of Isothermally Forged UDIMET 720 Nickel-Base Superalloy[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2005(4):895-905. |
| [6] | Y. Wang;W.Z. Shao;L. Zhen;L. Yang;X.M. Zhang .Flow behavior and microstructures of superalloy 718 during high temperature deformation[J].Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing,2008(1/2):479-486. |
| [7] | S.F.MEDINA;C.A.HERNANDEZ .GENERAL EXPRESSION OF THE ZENER-HOLLOMON PARAMETER AS A FUNCTION OF THE CHEMICAL COMPOSITION OF LOW ALLOY AND MICROALLOYED STEELS[J].Acta materialia,1996(1):137-148. |
| [8] | M.P. Phaniraj;A.K. Lahiri .Constitutive equation for elevated temperature flow behavior of plain carbon steels using dimensional analysis[J].Materials & design,2008(3):734-738. |
| [9] | 刘鹏飞,刘东,罗子健,孙文儒,郭守仁,胡壮麒.GH761合金的热变形行为与动态再结晶模型[J].稀有金属材料与工程,2009(02):275-280. |
| [10] | 李庆波,叶凡,周海涛,钟建伟,赵仲恺,王孟君.Mg-9Y-3Zn-0.5Zr合金的热变形行为[J].中国有色金属学报,2008(06):1012-1019. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%