Thermomechanical processing of Ti-5A1-5Mo-5V-3Cr

被引：173
作者：
Jones, N. G. [1 ]
Dashwood, R. J. [1 ]
Dye, D. [1 ]
Jackson, M. [1 ]
机构：
[1] Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2AZ, England
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 490卷 / 1-2期
基金：
英国工程与自然科学研究理事会;
关键词：
near-beta titanium alloys; forging; microstructure evolution; Ti-5-5-5-3;
D O I：
10.1016/j.msea.2008.01.055
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The constitutive behaviour and microstructural evolution of the near-P alloy Ti-5Al-5Mo-5V-3Cr in the ct + P condition has been characterised during isothermal subtransus forging at a range of temperatures and strain rates. The results indicate that Ti-5AI-5Mo-5V-3Cr has a shallower approach curve, and therefore, offers a more controllable microstructure than the near-P alloy Ti-10V-2Fe-3Al. Flow softening is small in magnitude in both alloys in the ot + P condition. The steady state flow stresses obey a Norton-Hoff constitutive law with an activation energy of Q = 183 U mol', which is similar to the activation energy for self-diffusion in the 0 phase, suggesting deformation is dominated by dynamic recovery in the P matrix. Good evidence is found for the existence of w phase after both air cooling and water quenching from above the P transus. In addition, dissolution of the ot phase is found to be slow at near-transus temperatures. (c) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：369 / 377
页数：9
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