Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 487, Issue 1-2, Pages 93-98Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2007.09.065
Keywords
dynamic austenite-to-fenite transformation; low carbon steel; dilatometry
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A new method based on quantitative dilatometric analysis was proposed to measure the ferrite fraction formed during deformation in the austenitic region of low carbon steel. The dynamically transformed ferrite (DTF) fraction (f(D)) can be derived by f(D) =f(T)-f(H), where f(T) is the total volume fraction of ferrite measured on the quenched specimen, which is subject to deformation and subsequent isothermal holding, and f(H) is the volume fraction of ferrite formed during the holding, which can be measured by using dilatometry. The DTF fraction derived by the new method was compared with that obtained by the conventional method of direct quenching. It is found that the DTF volume fraction obtained by the new method is smaller than that obtained by the conventional water quenching method, and the difference becomes larger at higher strain. (C) 2007 Elsevier B.V. All rights reserved.
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