对热轧MB8（Mg-1.5Mn-0.3Ce）镁合金板材的超塑性进行了研究。高温拉伸实验结果表明,合金在573～723 K及2×10-2～4×10-4s-1应变速率范围内具有良好的超塑性,在673 K及4×10-4s-1条件下得到最大断裂伸长率为441.6%;在723 K时最高应变速率敏感系数m为0.42,此时流变应力仅为6.3 MPa。此外,采用SEM对拉伸试样断口形貌进行了观察,并通过断裂区域显微组织的观察分析了Mg-1.5Mn-0.3Ce镁合金超塑性变形的机制。
参考文献
| [1] | 陈振华;严红革.变形镁合金[M].北京:化学工业出版社,2004 |
| [2] | 刘勤.金属的超塑性[M].上海:上海交通大学出版社,1989 |
| [3] | Valiev RZ.;Alexandrov IV.;Islamgaliev RK. .Bulk nanostructured materials from severe plastic deformation [Review][J].Progress in materials science,2000(2):103-189. |
| [4] | Furukawa M;Horita Z;Nemoto M et al.The use of severe plastic deformation for mierostructural control[J].Materials Science and Engineering,2002,324(1 -2):82-89. |
| [5] | J. Koike;T. Kobayashi;T. Mukai;H. Watanabe;M. Suzuki;K. Maruyama;K. Higashi .The activity of non-basal slip systems and dynamic recovery at room temperature in fine-grained AZ31B magnesium alloys[J].Acta materialia,2003(7):2055-2065. |
| [6] | J.A. del Valle;M.T. Perez-Prado;O.A. Ruano .Accumulative roll bonding of a Mg-based AZ61 alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(0):353-357. |
| [7] | 于彦东,张凯锋,蒋大鸣,郑海荣,王长丽.轧制镁合金超塑性和超塑胀形[J].中国有色金属学报,2003(01):71-75. |
| [8] | Wu L H;Wang L G;Wang P et al.Superplasticlty and deformation mechanism of Mg-7.0AI4).2Zn alloys[J].Rare Metal Materials and Engineering,2010,39(02):194-197. |
| [9] | Mohri T;Mabuchi M;Nakamura M et al.Mierostructural evolution and superplasticity of rolled Mg-9AI-1Zn[J].Materials Science and Engineering A,2000,290(1 -2):139-144. |
| [10] | 宋美娟,王智祥,汪凌云,刘筱薇.AZ31B镁合金板材超塑性变形与断裂机理研究[J].轻合金加工技术,2005(08):40-43. |
| [11] | Park S S;Bae G T;Kang D H et al.Superplastic deformation behavior of twin-roll east Mg-6Zn-IMn-IAI alloy[J].Scripta Materialia,2009,61:223-226. |
| [12] | 康志新,彭勇辉,桑静,简炜炜,赵海东,李元元.T型通道挤压变形Mg-1.5Mn-0.3Ce合金的超塑性和组织演变[J].金属学报,2009(09):1117-1124. |
| [13] | 龚义吉;杨振恒;梁名士 等.MB8镁合金板材的超塑气压成形[J].锻压技术,1984,3:29—31. |
| [14] | Shang, L.;Yue, S.;Verma, R.;Krajewski, P.;Galvani, C.;Essadiqi, E. .Effect of microalloying (Ca, Sr, and Ce) on elevated temperature tensile behavior of AZ31 magnesium sheet alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2011(10/11):3761-3770. |
| [15] | 冯端.金属物理学[M].北京:科学出版社,1999 |
| [16] | Wu X;Liu Y .Superplastieity of coarse-grained magnesium alloy[J].Scripta Materialia,2002,46(04):269-274. |
| [17] | Mabuchi M.;Higashi K. .On accommodation helper mechanism for superplasticity in metal matrix composites[J].Acta materialia,1999(6):1915-1922. |
| [18] | 张青来,肖富贵,郭海铃,A B Bondarev,B I Bondarev.AZ31B镁合金薄板超塑性气胀成形[J].稀有金属材料与工程,2009(07):1259-1263. |
| [19] | 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. |
| [20] | Frost H J;Ashby M F.Deformation Mechanism Maps[M].Oxford:pergamon Press,1982:44. |
| [21] | 李世伟,刘秀华,王云禄.变形温度对2A12铝合金超塑性的影响[J].轻合金加工技术,2002(07):43-44,47. |
| [22] | 肖阳,张新明.Mg-9Gd-4Y-0.6Zr合金的孪晶超塑性[J].特种铸造及有色合金,2010(10):958-961. |
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