采用Gleeble-1500热物理模拟试验机对7050铝合金在变形温度573～723 K、应变速率0.01 ～10 s-1、最大压缩量80％的条件下进行了等温压缩实验,得到该合金多组真实应力-应变数据,以此作为计算应变速率敏感指数(m值)、功率耗散系数(η值)、失稳判据(ζ值)三重判据的底层材料数据.通过m值、η值和ζ值的正负分布而三重递进识别出不同应变下稳定变形参数区和失稳区,最后将不同应变下的功率耗散图和失稳图叠加以构建含应变影响的系列加工图,基于此识别出高η值和高ζ值的最优化稳定变形参数区,以及负m值、负η值和负ζ值的最大化失稳变形参数区,可以为确定最佳的热变形工艺参数提供理论指导.
参考文献
| [1] | 石岩 .7050铝合金热压缩变形行为与组织演化研究[D].中南大学,2007. |
| [2] | Barnett M R .Influence of deformation conditions and texture on the high temperature flow stress of magnesium AZ31[J].Journal of Light Metals,2001,1(03):167-177. |
| [3] | Juan Liu;Zhenshan Cui;Congxing Li .Modelling of flow stress characterizing dynamic recrystallization for magnesium alloy AZ31B[J].Computational Materials Science,2008(3):375-382. |
| [4] | T. Al-Samman;G. Gottstein .Dynamic recrystallization during high temperature deformation of magnesium[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):411-420. |
| [5] | Liu L F;Zhou H T;Wang Q D et al.Dynamic recrystallization behavior of AZ61 magnesium alloy[J].Advances in Technology of Materials and Materials Processing Journal,2004,6(02):155-165. |
| [6] | 鞠泉,李殿国,刘国权.15Cr-25Ni-Fe基合金高温塑性变形行为的加工图[J].金属学报,2006(02):218-224. |
| [7] | 汪凌云,范永革,黄光杰,黄光胜.镁合金AZ31B的高温塑性变形及加工图[J].中国有色金属学报,2004(07):1068-1072. |
| [8] | 刘娟,崔振山,李从心.包含应变的三维加工图与有限元相结合的金属可加工性分析[J].机械工程学报,2008(05):108-113. |
| [9] | Meng G;LIB L;LI H M et al.Hot deformation and processing maps of an Al-5.7 wt.％ Mg alloy with erbium[J].Materials Science and Engineering A,2009,517(1-2):132-137. |
| [10] | Prasad YVRK;Rao KP .Processing maps and rate controlling mechanisms of hot deformation of electrolytic tough pitch copper in the temperature range 300-950 degrees C[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):141-150. |
| [11] | H. Y. Kim;H. C. Kwon;H. W. Lee;Y. T. Im;S. M. Byon;H. D. Park .Processing map approach for surface defect prediction in the hot bar rolling[J].Journal of Materials Processing Technology,2008(1/3):70-80. |
| [12] | Quan G Z;Liu K W;Zhou J .Dynamic softening behaviors of 7075 aluminum alloy[J].Transactions of Nonferrous Metals Society of China,2009,19(s):537-541. |
| [13] | Yao XX.;Hutchinson B.;Zajac S. .The strain-rate sensitivity of flow stress and work-hardening rate in a hot deformed Al-1.0Mg alloy[J].Journal of Materials Science Letters,2000(9):743-744. |
| [14] | Momeni, A.;Dehghani, K. .Characterization of hot deformation behavior of 410 martensitic stainless steel using constitutive equations and processing maps[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2010(21/22):5467-5473. |
| [15] | 付欣 .7050铝合金高温变形行为实验研究[D].中南大学,2008. |
| [16] | Srinivasan N;Prasad YVRK;Rao PR .Hot deformation behaviour of Mg-3Al alloy - A study using processing map[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):146-156. |
| [17] | G. Jagan Reddy;N. Srinivasan;Amol A. Gokhale;B. P. Kashyap .Processing map for hot working of spray formed and hot isostatically pressed Al-Li alloy (UL40)[J].Journal of Materials Processing Technology,2009(18/19):5964-5972. |
| [18] | S. Anbuselvan;S. Ramanathan .Hot deformation and processing maps of extruded ZE41A magnesium alloy[J].Materials & design,2010(5):2319. |
| [19] | G. Ganesan;K. Raghukandan;R. Karthikeyan .Development of processing map for 6061 Al/15 percent SICP through neural networks[J].Journal of Materials Processing Technology,2005(3):423-429. |
| [20] | Y. V. R. K. Prasad .Processing Maps: A Status Report[J].Journal of Materials Engineering and Performance,2003(6):638-645. |
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