利用Gleeble-3800热模拟实验机,在应变速率在0.001～1 s-1以及变形温度在750～950℃范围内对Ti555211合金进行等温恒应变速率压缩实验.本工作基于位错变化密度的内变量方法建立了Ti555211合金热变形本构模型,通过真应力-真应变曲线分析了变形温度和变形速率对流变应力和微观组织的影响规律.结果表明:所建立的本构模型与实验值的平均相对误差为15.25％,相关系数为0.94277,从而为制定新型Ti555211近β钛合金锻造工艺提供科学的理论依据.
参考文献
| [1] | 蔡军,李付国.一种基于等温多塑性变形机制耦合的数值模拟方法[J].稀有金属材料与工程,2011(05):778-783. |
| [2] | 李晓丽 .钛合金高温变形时跨层次模型及数值模拟[D].西北工业大学,2005. |
| [3] | Busso EP. .A continuum theory for dynamic recrystallization with microstructure-related length scales[J].International Journal of Plasticity,1998(4-5):319-353. |
| [4] | Lin J;Liu Y;Farrugia DCJ;Zhou M .Development of dislocation-based unified material model for simulating microstructure evolution in multipass hot rolling[J].Philosophical magazine: structure and properties of condensed matter,2005(18):1967-1987. |
| [5] | Fan, X.G.;Yang, H. .Internal-state-variable based self-consistent constitutive modeling for hot working of two-phase titanium alloys coupling microstructure evolution[J].International Journal of Plasticity,2011(11):1833-1852. |
| [6] | 李志燕,杨合,孙志超,唐泽,Fang Yanli,Li Peng,Wang Huaming.TA15钛合金大型复杂构件等温局部加载过渡区宏微观变形研究[J].稀有金属材料与工程,2008(09):1516-1521. |
| [7] | Stoller RE.;Zinkle SJ. .On the relationship between uniaxial yield strength and resolved shear stress in polycrystalline materials[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2000(Pt.A):349-352. |
| [8] | Nes E.;Pettersen T. .ON THE MECHANISMS OF WORK HARDENING AND FLOW-STRESS SATURATION[J].Scripta materialia,2000(1):55-62. |
| [9] | Beyerlein IJ;Tome CN .A dislocation-based constitutive law for pure Zr including temperature effects[J].International Journal of Plasticity,2008(5):867-895. |
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%