Dynamic recrystallisation in aluminium alloyed hypereutectoid steels under hot working conditions

Title
Dynamic recrystallisation in aluminium alloyed hypereutectoid steels under hot working conditions
Authors
Phaniraj Madakashira장윤수김동익심재혁이충열이덕락
Keywords
Hypereutectoid steel; Aluminium; Dynamic recrystallisation; Mean flow stress
Issue Date
2010-06
Publisher
Materials science and technology : MST : a publication of the Institute of Metals
Citation
VOL 26, NO 6, 714-719
Abstract
Hot deformation behaviour of hypereutectoid steels (0‧ 83–0‧ 92%C) alloyed with 0–2%Al is investigated. Compression tests were carried out in the temperature range 1000–1100℃ at 0‧ 1– 10 s-1 strain rates. The stress–strain curves are analysed using work hardening rate flow stress plots to determine the critical and peak stress and the corresponding strains associated with dynamic recrystallisation. The addition of Al increases the strain hardening rate and lowers the peak strain. There is an optimum content beyond which peak strain increases with Al addition. Phase diagram calculations show that the multiphase microstructure present during deformation is responsible for the non-linear effect of Al. The steady state stress is modelled using the sine hyperbolic constitutive equation, and the activation energy for deformation is determined.
URI
http://pubs.kist.re.kr/handle/201004/37523
ISSN
0267-0836
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KIST Publication > Article
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