Optimizing the hot-forging process parameters for connecting rods made of PM titanium alloy

被引：20
|
作者：
Qiu, J. W. [1 ]
Liu, Y. [1 ]
Liu, B. [2 ]
Liu, Y. B. [1 ]
Wang, B. [1 ]
Ryba, Earle [3 ]
Tang, H. P. [4 ]
机构：
[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China
[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
[3] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
[4] NW Inst Nonferrous Met Res, Xian 710016, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE | 2012年 / 47卷 / 08期
关键词：
MICROSTRUCTURE EVOLUTION; DEFORMATION-BEHAVIOR; FLOW;
D O I：
10.1007/s10853-011-6239-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to optimize the processing parameters of a new low-cost titanium alloy connecting rod made of powder forging, the deformation behavior of an alpha + beta type Ti-1.5Fe-2.25Mo (wt%) alloy produced by elemental powder metallurgy (PM) route was studied using isothermal compression tests. The constitutive equations and a processing map were established to characterize the flow behavior and predict the optimum deformation parameters. The calculated apparent activation energy was 257.73 kJ/mol for deformation in the alpha + beta phase region and 378.01 kJ/mol in the beta phase region. Two deformation mechanism domains were found: alpha + beta -> beta phase transformation and dynamic recrystallization. The results show that the optimum deformation parameters for the present alloy are (700-800 A degrees C, 10(-1.7)-1 s(-1)) and (800-900 A degrees C, 10(-2)-10 s(-1)). Based on these results, a finite element method (FEM) simulation of the hot-forming of a connecting rod was conducted, and the simulated results have been successfully used in an industrial forging of the connecting rod.
引用
收藏
页码：3837 / 3848
页数：12
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