Hot deformation characteristics and microstructure evolution of Ti-5Al-3Mo-1.5V alloy
Journal article, 2021

A detailed investigation was conducted to study the concurrent effect of temperature and strain rate on the microstructure evolution in Ti-5Al-3Mo-1.5V dual-phase Titanium alloy. By applying varying strain rates from 10-3 to 10 s-1between 1098 and 1298 K at an interval of 50 K, isothermal compression characteristics and microstructural changes were recorded. The sizes of globules, concentrated predominantly at the lamellar kinks, were found to be inversely proportional to the strain rate. Further, a dynamic material model was employed to assess and plot the processing map displaying the safe hot working regime. The apparent hot-working activation energy in the alpha+ beta and beta phase field was 636 kJ/mol and 379 kJ/mol, respectively. A higher activation energy than the self-diffusion threshold of the alpha+beta and beta field was attributed to lamellae breakup and dynamic recrystallization in the respective phase fields. The microstructure analysis and identified softening mechanisms further helped in concluding the safe hot working regime to be 1248 K and 10(-3) s(-1).

Hot working

Dynamic recrystallization

Globularization

Dual-phase alpha plus beta titanium alloy

Lamellar morphology

Author

Faisal Waqar Syed

Indian Institute of Technology

Nitesh Raj Jaladurgam

Chalmers, Physics, Microstructure Physics

V. Anil Kumar

Indian Space Research Organisation (ISRO)

Rohit Kumar Gupta

Indian Space Research Organisation (ISRO)

Anand K. Kanjarla

Indian Institute of Technology

INTERNATIONAL JOURNAL OF ADVANCES IN ENGINEERING SCIENCES AND APPLIED MATHEMATICS

0975-0770 (ISSN) 0975-5616 (eISSN)

Vol. In Press

Subject Categories

Other Materials Engineering

Metallurgy and Metallic Materials

Condensed Matter Physics

DOI

10.1007/s12572-020-00283-5

More information

Latest update

5/29/2024