Hot deformation characteristics and microstructure evolution of Ti-5Al-3Mo-1.5V alloy
Artikel i vetenskaplig tidskrift, 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).

Globularization

Hot working

Lamellar morphology

Dual-phase alpha plus beta titanium alloy

Dynamic recrystallization

Författare

Faisal Waqar Syed

IIT Madras

Nitesh Raj Jaladurgam

Chalmers, Fysik, Mikrostrukturfysik

V. Anil Kumar

Indian Space Res Org ISRO

Rohit Kumar Gupta

Indian Space Res Org ISRO

Anand K. Kanjarla

IIT Madras

INTERNATIONAL JOURNAL OF ADVANCES IN ENGINEERING SCIENCES AND APPLIED MATHEMATICS

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

Vol. In Press

Ämneskategorier

Annan materialteknik

Metallurgi och metalliska material

Den kondenserade materiens fysik

DOI

10.1007/s12572-020-00283-5

Mer information

Senast uppdaterat

2021-02-08