对初始晶粒度为66 μm的轧制板材在不同温度和不同变形速率下进行超塑性拉伸实验,研究Mg-Gd-Y-Zr合金粗晶热轧板材的超塑性行为与微结构特征.在温度为435 ℃、应变速率为5×10-4 s-1的变形条件下获得的最大伸长率为380%,应变速率敏感系数为0.56.合金的表观变形激活能高于镁的晶界扩散激活能或晶格扩散激活能;合金的超塑性变形机制为晶格扩散控制的位错协调晶界滑动机制.微结构分析结果表明:第二相钉轧晶界,较软的不规则块状的β相承受了部分塑性变形.
参考文献
| [1] | A. A. Luo .Recent magnesium alloy development for elevated temperature applications[J].International Materials Reviews,2004(1):13-30. |
| [2] | V. Neubert;I. Stulikova;B. Smola;B.L. Mordike;M. Vlach;A. Bakkar;J. Pelcova .Thermal stability and corrosion behaviour of Mg-Y-Nd and Mg-Tb-Nd alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1/2):329-333. |
| [3] | Mordike BL. .Creep-resistant magnesium alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1-2 Special Issue SI):103-112. |
| [4] | B. Smola;I. Stulfkova;J. Pelcova .Significance of stable and metastable phases in high temperature creep resistant magnesium-rare earth base alloys[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2004(1/2):196-201. |
| [5] | 肖阳,张新明,陈健美,蒋浩.Mg-9Gd-4Y-0.6Zr合金挤压T5态的高温组织与力学性能[J].中国有色金属学报,2006(04):709-714. |
| [6] | J.J. Blandin .Superplastic Forming of Magnesium Alloys: Production of Microstructures, Superplastic Properties, Cavitation Behaviour[J].Materials Science Forum,2007(0):211-217. |
| [7] | del Valle JA;Penalba F;Ruano OA .Optimization of the microstructure for improving superplastic forming in magnesium alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1-2):165-171. |
| [8] | 文九巴;杨蕴林;杨永顺;陈拂晓 张柯柯 张耀宗.超塑性应用技术[M].北京:机械工业出版社,2005:306. |
| [9] | 马洪涛.MB26合金超塑性的研究[J].材料工程,1998(09):11. |
| [10] | Hiroyuki Watanabe;Toshiji Mukai;Koichi Ishikawa .Superplasticity of a Particle-Strengthened WE43 Magnesium Alloy[J].Materials transactions,2001(1):157-162. |
| [11] | H. Somekawa;K. Hirai;H. Watanabe .Dislocation creep behavior in Mg-Al-Zn alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):53-61. |
| [12] | H. Fujii;H. Iwasaki;J.K. Araki .Press Forming Technology Using Superplastic Deformation for Mg Alloy Sheet[J].Materials Science Forum,2005(0):571-574. |
| [13] | Y.H. Wei;Q.D. Wang;Y.P. Zhu .Superplasticity and grain boundary sliding in rolled AZ91 magnesium alloy at high strain rates[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):107-115. |
| [14] | W. -J. KIM;S. W. CHUNG;C. S. CHUNG .SUPERPLASTICITY IN THIN MAGNESIUM ALLOY SHEETS AND DEFORMATION MECHANISM MAPS FOR MAGNESIUM ALLOYS AT ELEVATED TEMPERATURES[J].Acta materialia,2001(16):3337-3345. |
| [15] | J.C. Tan;M.J. Tan .Dynamic continuous recrystallization characteristics in two stage deformation of Mg-3Al-1Zn alloy sheet[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):124-132. |
| [16] | Xinming Zhang;Li Li;Yunlai Deng .Superplasticity and microstructure in Mg-Gd-Y-Zr alloy prepared by extrusion[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):296-300. |
| [17] | Yan Gao;Qudong Wang;Jinhai Gu;Yang Zhao;Yan Tong .Behavior of Mg–15Gd–5Y–0.5Zr alloy during solution heat treatment from 500 to 540 ℃[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1-2):117-123. |
| [18] | T. Mohri;M. Mabuchi;M. Nakamura;T. Asahina;H. Iwasaki;T. Aizawa;K. Higashi .Microstructural evolution and superplasticity of rolled Mg-9Al-1Zn[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2000(1/2):139-144. |
| [19] | J. C. Tan;M. J. Tan .Superplasticity in a rolled Mg-3Al-1Zn alloy by two-stage deformation method[J].Scripta materialia,2002(2):101-106. |
| [20] | Watanabe H.;Tsutsui H. .Superplastic Behavior in Commercial Wrought Magnesium Alloys[J].Materials Science Forum,2000(0):171-176. |
| [21] | SHERBY O D;WADSWORTH J .Superplastic-recent advances and future direction[J].Progress in Materials Science,1989,33:169-221. |
| [22] | WU X;LIU Y .Superplasticity of coarse-grained magnesium alloy[J].Scripta Materialia,2002,46(04):269-274. |
| [23] | FROST H J;ASHBY M F.Deformation mechanism maps[M].Oxford:pergamon Press,1982 |
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