Effects of austenite conditioning on austenite/ferrite phase transformation of HSLA steel

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Effects of surface area of prior austenite grain boundaries and deformation bands on austenite/ferrite phase transformation of high strength low alloy (HSLA) steel during hot working were investigated through simulated hot workings using Gleeble 1500. Effective surface areas were controlled by applying different austenite conditionings. It was found that the volume fraction of strain induced dynamic transformation (SIDT) ferrites increased with an increase in the effective surface area. The volume fraction of SIDT ferrite nucleated from the elongated prior austenite grains, however, was higher than that nucleated from equi-axed prior austenite grains at the same effective surface area. From the experiment results and discussions, it was concluded that diffusional austenite/ferrite phase transformation of HSLA steel by the interface nucleation and growth mechanism is accelerated by the deformation bands in the non-recrystallization region.
Publisher
JAPAN INST METALS
Issue Date
2004-01
Language
English
Article Type
Article
Citation

MATERIALS TRANSACTIONS, v.45, pp.137 - 142

ISSN
1345-9678
DOI
10.2320/matertrans.45.137
URI
http://hdl.handle.net/10203/4611
Appears in Collection
MS-Journal Papers(저널논문)
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