Semi-solid thixoforming constitutive equation of hypereutectic Al-Si alloy

被引：0
|
作者：
Wang, Yuntao [1 ,2 ]
Yuan, Xiaoguang [2 ]
Yu, Baoyi [2 ]
Huang, Hongjun [2 ]
机构：
[1] College of Mechanical Engineering, Inner Mongolia University for the Nationalities, Tongliao
[2] School of Materials Science and Engineering, Shenyang University of Technology, Shenyang
来源：
Yuan, Xiaoguang (wyt531429@126.com) | 1600年 / Chinese Mechanical Engineering Society卷 / 50期
关键词：
Constitutive equations; Hypereutectic Al-Si alloy; Semi-solid processing; Thixoforming;
D O I：
10.3901/JME.2014.24.050
中图分类号：
学科分类号：
摘要：
The semi-solid thixoforming behavior of hypereutectic Al-20Si-3Fe-1Mn-4Cu-1Mg alloy is studied by single-pass compression experiment, at a range of deformation temperature of 833 K, 853 K, 873 K and a range of strain rate of 0.1 s-1, 0.01 s-1, 0.001 s-1. The results show that the flow stress is decreased with increasing in deformation temperature and it is increased with increasing in strain rate. A new method is discussed that semi-solid thixoforming can be divided into analogous elastic deformation, strain hardening and rheology-viscoplastic deformation stages in different true strain range. The thixoforming constitutive equations are derived by multiple regressions in different deformation stage. The curves are calculated by the thixoforming constitutive equations compared with the experiment curves show that the thixoforming constitutive equations have higher precision and fit well with the experimental curves, for most correlation coefficients are above 0.95, and concomitant probabilities are less than 0.001. The true stress-strain development regularity and characteristics can be reflected by the semi-solid thixoforming constitutive equations, it can be applied in the simulation of semi-solid thixoforming process of hypereutectic Al-20Si-3Fe-1Mn-4Cu-1Mg alloy. © 2014 Journal of Mechanical Engineering.
引用
收藏
页码：50 / 58
页数：8
相关论文
共 25 条
  • [1] Dao V., Zhao S., Lin W., Numerical simulation on A356 aluminum alloy semi-solid slurry preparation with electromagnetic stirring, Journal of Mechanical Engineering, 48, 14, pp. 50-57, (2012)
  • [2] Tan J., Zhang H., Li Z., Et al., Effect of parameters of two dimensional vibration on microstructures of semi-solid ZL104 alloy, The Chinese Journal of Nonferrous Metals, 23, 3, pp. 673-678, (2013)
  • [3] Yu X., Li F., Li M., Modeling and optimization of general constitutive equation of semi-solid thixoforming, Chinese Journal of Mechanical Engineering, 43, 10, pp. 72-76, (2007)
  • [4] Joly P.A., Mehrabian R., The rheology of a partially solid alloy, Journal of Materials Science, 11, 8, pp. 1393-1418, (1976)
  • [5] Kumar P., Martin C.L., Brown S., Shear rate thickening flow behavior of semisolid slurries, Metallurgical Transactions A, 24, 5, pp. 1107-1116, (1993)
  • [6] Chen J., Ju L., Li L., Rheological characterization of semisolid Al-6.5Si alloys, Acta Metallurgica Sinica, 39, 5, pp. 476-481, (2003)
  • [7] Jonas J.J., Sellars C.M., Tegart W.M., Strength and structure under hot-working conditions, Metallurgical Reviews, 14, 1, pp. 1-24, (1969)
  • [8] Martin C.L., Favier D., Suery M., Viscoplastic behaviour of porous metallic materials saturated with liquid Part 1: Constitutive Equations-Part 2: Experimental identification of a Sn-Pb model alloy, International Journal of Plasticity, 3, pp. 215-259, (1997)
  • [9] Martin C.L., Favier D., SuEry M., Fracture behaviour in tension of viscoplastic porous metallic materials saturated with liquid, International Journal of Plasticity, 15, 10, pp. 981-1008, (1999)
  • [10] Nguyen T.G., Favier D., Suery M., Theoretical and experimental study of the isothermal mechanical behaviour of alloys in the semi-solid state, International Journal of Plasticity, 10, 6, pp. 663-693, (1994)
123