采用搅拌铸造法制备了漂珠(FAC)/AZ91D镁合金复合材料.研究了该复合材料的高温压缩变形行为,分析了压缩变形温度和应变率对FAC/AZ91D镁合金复合材料压缩变形行为的影响规律,并计算了其热变形激活能.结果表明:FAC/AZ91D镁合金复合材料的高温压缩真应力-真应变曲线分为4个阶段:弹性变形、加工硬化、峰值应力和稳态流变阶段.相同应变率下,FAC/AZ91D镁合金复合材料的峰值应力和稳态流变应力随压缩变形温度的升高而降低;相同压缩变形温度下,流变应力随应变率增大而升高.在相同应变率或相同压缩变形温度下,FAC/AZ91D镁合金复合材料的热变形激活能随压缩应变率或压缩变形温度的升高而增大,其热压缩行为可以用双曲正弦函数形式的Arrhenius关系来描述.压缩变形温度与应变率对FAC/AZ91D镁合金复合材料的高温压缩组织均有重要影响.提高压缩变形温度或增大应变率,均可加速动态再结晶的进程.
参考文献
| [1] | M. HAJIALI FINI;A. AMADEH.AZ91镁合金脉冲电沉积Ni-SiC纳米复合涂层的磨损与腐蚀性能[J].中国有色金属学报（英文版）,2013(10):2914-2922. |
| [2] | 邓坤坤;王翠菊;王晓军.SiCP/AZ91复合材料的显微组织、力学性能及强化机制[J].复合材料学报,2014(2):388-395. |
| [3] | Xuezhi Zhang;Qiang Zhang;Henry Hu.Tensile behaviour and microstructure of magnesium AM60-based hybrid composite containing Al_2O_3 fibres and particles[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2014:269-276. |
| [4] | Zhiqiu Huang;Sirong Yu.Microstructure characterization on the formation of in situ Mg_2Si and MgO reinforcements in AZ91D/Flyash composites[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,20112(2):311-315. |
| [5] | P.K. Rohatgi;A. Daoud;B.F. Schultz.Microstructure and mechanical behavior of die casting AZ91D-Fly ash cenosphere composites[J].Composites. Part A, Applied science and manufacturing,20096/7(6/7):883-896. |
| [6] | HUANG Zhi-qiu;YU Si-rong;LI Mu-qin.Microstructures and compressive properties of AZ91D/fly-ash cenospheres composites[J].中国有色金属学报（英文版）,2010(z2):458-462. |
| [7] | X.J. Wang;K. Wu;W.X. Huang.Study on fracture behavior of particulate reinforced magnesium matrix composite using in situ SEM[J].Composites science and technology,200711/12(11/12):2253-2260. |
| [8] | 刘六法;丁汉林;鎌土重晴;丁文江;小島陽.AZ91镁合金的热压缩行为（Ⅰ）--EBSP分析[J].中国有色金属学报,2008(2):237-242. |
| [9] | McQueen HJ.;Ryan ND..Constitutive analysis in hot working[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,20021-2 Special Issue SI(1-2 Special Issue SI):43-63. |
| [10] | A. GALIYEV;R. KAIBYSHEV;G. GOTTSTEIN.CORRELATION OF PLASTIC DEFORMATION AND DYNAMIC RECRYSTALLIZATION IN MAGNESIUM ALLOY ZK60[J].Acta materialia,20017(7):1199-1207. |
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%