Study of fractional softening in multi-stage hot deformation
In this paper, the softening behaviour of a medium-carbon steel under hot working conditions in multi-stage compression is presented. Continuous and interrupted compression tests were performed in the temperature range 800–1100 degrees Celsius at strain rates of 0.1, 1 and 8 s1. The interrupted deformations were conducted with delay times varying between 1 to 20 s after achieving a strain of approximately 0.2 to 0.4 in the first stage. The fractional softening has been predicted by three different methods, namely the offset-stress method, the back-extrapolation stress method and a currently proposed strain-recovery method. It has been found that the back-extrapolation stress method normally predicts higher reloading stress and hence a lower fractional softening than that of the offset-stress method. The strain-recovery method yields consistent results in the estimation of fractional softening that can be used in predicting the deformation mechanism.
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|Item Type:||Journal Article|
|Additional Information:||For more information please refer to the publisher's website (link above) or contact the author: email@example.com|
|Keywords:||Deformation mechanism, Medium, carbon steel, Multi, stage compression|
|Subjects:||Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Mechanical Engineering not elsewhere classified (091399)|
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering|
|Copyright Owner:||Copyright 1998 Elsevier|
|Deposited On:||09 Mar 2007|
|Last Modified:||15 Jan 2009 07:22|
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