Journal
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
Volume 220, Issue -, Pages 224-230Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2015.01.006
Keywords
Deformation processing map; Formability; Duplex stainless steel; Ring rolling
Funding
- Industrial Strategic Technology Development program - Ministry of Trade, Industry and Energy (MOTIE, Korea) [10042657]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10042657] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Studies on quantitative formability estimation by using deformation processing map have been performed to estimate deformation characteristics of SAF2205 duplex stainless steel during ring rolling process. To develop deformation processing map, dynamic materials model has been used on the basis of stress-strain relationships from Gleeble compression test. As a quantitative formability index, summation of eta(ij) (efficiency of power dissipation for i-th unit deformation group in j-th slicing plane) multiplied by area fraction of unit deformation group (A(ij)) has been suggested. eta(ij)-value and strain rate can be obtained by finite element method. For the feasibility analysis, the optimum blank dimension at various operating temperatures has been determined on the basis of formability index. The analysis result strongly confirms that the proposed formability index can provide a reliable guide in process design of ring rolling process. (C) 2015 Elsevier B.V. All rights reserved.
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