Flow stress behavior and deformation characteristics of Ti-3Al-5V-5Mo compressed at elevated temperatures

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)451-457
Journal / PublicationMaterials and Design
Volume23
Issue number5
Publication statusPublished - Aug 2002
Externally publishedYes

Abstract

Samples of Ti-3AI-5V-5Mo alloy were compressed in both β and α + β phase region on a Gleeble 1500 Simulator. Compression tests were carried out in the temperature range of 700-1000 °C and strain rate range of 0.05-15 s-1. Experimental results show that the flow stress of Ti-3AI-5V-5Mo alloy decreases with the increase of temperature and the decrease of strain rate. At high strain rate, typically 5 and 15 s-1, discontinuous yielding followed by flow oscillations was observed in both β phase region and α + β phase region; at low strain rate, the flows display single peak stress. The flow stress at a strain of 0.2 was analyzed with a stand constitutive equation. Activation energy parameters were obtained, and they are 133.46 kJ/mol for the β phase region and 661.90 kJ/mol for the α + β phase region. Microstructures of the compressed specimens in water-quenched conditions were critically observed. High temperature deformation mechanisms have been elucidated. In the β phase region, the operative deformation mechanisms are dynamic recovery at high strain rates and grain boundary sliding at low strain rates. In α + β phase region, the α phase undergoes dynamically recrystallization at both high and low stain rates. © 2002 Elsevier Science Ltd. All rights reserved.

Research Area(s)

  • Deformation mechanisms, Flow stress behavior, Titanium

Citation Format(s)

Flow stress behavior and deformation characteristics of Ti-3Al-5V-5Mo compressed at elevated temperatures. / Li, L. X.; Lou, Y.; Yang, L. B.; Peng, D. S.; Rao, K. P.

In: Materials and Design, Vol. 23, No. 5, 08.2002, p. 451-457.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal