Hot Deformation Studies on beta(0) Stabilized TiAl Alloy Made Through Ingot Metallurgy Route
Journal article, 2021

Hot deformation studies of a newly designed gamma + alpha(2) based TiAl alloy of composition Ti-42Al-6Nb-3Cr-0.1B at.% (nominal) realized through ingot metallurgy route using double vacuum arc remelting were carried out. Hot isothermal compression testing was performed in Gleeble (TM) 3500 at different temperatures ranging from 1123 to 1373 K at 50 K intervals and strain rates of 0.001-1 s(-1). Processing maps were developed using an approach of dynamic material modeling of the flow curves to establish the safe hot working regime. Strain rate sensitivity and Zener-Holloman parameters were calculated and constitutive equation was derived. Microstructural investigation revealed dynamic recrystallization and activation of multiple twin systems as the main softening mechanisms operating at optimum hot working conditions. Safe hot working temperature and strain rate regime for the alloy was found to be in the temperature range of 1323-1373 K and strain rate range of 0.001-0.01 s(-1).

Processing maps

Vacuum arc remelting (VAR)

Twinning

Safe hot working zone

DRX

Titanium aluminide

Author

R. K. Gupta

Indian Space Research Organisation (ISRO)

V. Anil Kumar

Indian Space Research Organisation (ISRO)

Nitesh Raj Jaladurgam

Chalmers, Physics, Microstructure Physics

Indian Institute of Technology, Madras

Bhavanish Kumar Singh

Indian Institute of Technology, Madras

Anand K. Kanjarla

Indian Institute of Technology, Madras

TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS

0972-2815 (ISSN) 0975-1645 (eISSN)

Vol. In Press

Subject Categories

Applied Mechanics

Other Materials Engineering

Metallurgy and Metallic Materials

DOI

10.1007/s12666-021-02366-8

More information

Latest update

8/24/2021