Influence of dynamic strain aging on plastic instability behaviour of near alpha titanium alloy Timetal 834

Author: Prasad, K.

Source: Materials Science and Technology, Volume 26, Number 9, September 2010 , pp. 1068-1072(5)

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Abstract:

The deformation behaviour of near alpha titanium alloy Timetal 834 was investigated by analysing Considére criterion in temperature range between 300 and 500°C at an interval of 25°C. In the dynamic strain aging (DSA) regime (400–475°C) studied in this material, Considére criterion was satisfied partially at peak DSA temperature (450°C). This was attributed to maximum DSA effect at 450°C which eventually resulted in specimen fracture at low ductility levels. Strain hardening exponent (n) values was determined using Ludwik plot, Considére criterion and obtained experimentally from uniform strain. The n values obtained from Ludwik plot and Considére criterion were greater than the uniform strain in DSA regime studied.

Keywords: DYNAMIC STRAIN AGING; TENSILE DEFORMATION; PLASTIC INSTABILITY; TIMETAL 834; CONSIDÉRE CRITERION; STRAIN HARDENING EXPONENT

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/174328408X302422

Affiliations: Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad 500 058, India;, Email: kartik.sonu@gmail.com

Publication date: 2010-09-01

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