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Effects of silicon on characteristics of dynamic strain aging in a near-α titanium alloy

  • Kartik Prasad , Vikas Kumar , Kota Bhanu Sankara Rao and Mahadevan Sundararaman
Published/Copyright: March 31, 2017
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 108 Issue 4

Abstract

The effects of temperature and strain rate on the tensile properties of Timetal 834 near-α titanium alloy and alloy 834 without silicon were examined in the temperature range of 250 °C to 600 °C, employing strain rates in the range of 6.67 × 10−6 s−1 to 6.67 × 10−3 s−1. Manifestations of dynamic strain aging such as serrated flow, plateaus in the variations of 0.2 % yield strength and ultimate tensile strength, peak in strain hardening exponent with temperature and negative strain rate sensitivity were observed in both the alloys. Serration maps in terms of strain rate versus temperature are presented for both the alloys. The activation energy for serrated flow was determined in both the alloys by employing various methodologies mentioned in the literature. Analysis of the results suggested that addition of Si leads to increased severity of dynamic strain aging.

Keywords: Dynamic strain aging; Titanium alloy; Tensile behavior; Activation energy; Serrated flow
*Correspondence address, Kartik Prasad, PhD, Scientist, Mechanical Behavior Group, Defence Metallurgical Research Laboratory, Kanchanbagh, Hyderabad – 500 058, India, Tel.: +91 40 24586407, Fax: +91 40 24340266, E-mail:

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Received: 2016-06-21
Accepted: 2016-11-29
Published Online: 2017-03-31
Published in Print: 2017-04-13

© 2017, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111478
Keywords for this article
Dynamic strain aging; Titanium alloy; Tensile behavior; Activation energy; Serrated flow

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Formation of intermetallic compounds and their effect on mechanical properties of aluminum–titanium alloy films
  5. Microstructure and properties of hot extruded Mg-3Zn-Y-xCu (x = 0, 1, 3, 5) alloys
  6. Effects of rare-earth element addition and heat treatment on the microstructures and mechanical properties of Al-25 % Si alloy
  7. Effects of silicon on characteristics of dynamic strain aging in a near-α titanium alloy
  8. Influence of heat treatment on the structure, hardness and strength of ZnAl40Cu3 alloy
  9. W–Cu composites subjected to heavy hot deformation
  10. Electrochemical performance of CuBi2O4 nanoparticles synthesized via a polyacrylamide gel route
  11. Mechanical properties of nano-SiO2 reinforced 3D glass fiber/epoxy composites
  12. Reinforcement effect and synergy of carbon nanofillers with different dimensions in high density polyethylene based nanocomposites
  13. Short Communications
  14. A general method towards transition metal monoboride nanopowders
  15. DGM News
  16. DGM News
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