Microstructure Prediction during Incremental Processes for Hot Forming of 718 Alloy

Abstract:

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Main works on microstructure prediction on superalloys during hot forming processes deal with close die forging of 718 alloy. In this paper, we focused our interest towards incremental hot forming process. In that case, matters become more complex, due to the partially recrystallized microstructure we have to take into account at the beginning of each pass. An original method is presented in this paper, still using a phenomenological approach, according to Avrami formulation, with two main additional assumptions, in order to carry out computation on microstructure evolution during the process. Examples with comparisons between real and computed microstructure (recristallyzed fraction, different populations of grain size) enable us to valid our model for bar forging.

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Edited by:

M. Heilmaier

Pages:

186-191

DOI:

10.4028/www.scientific.net/AMR.278.186

Citation:

C. Dumont and E. Georges, "Microstructure Prediction during Incremental Processes for Hot Forming of 718 Alloy", Advanced Materials Research, Vol. 278, pp. 186-191, 2011

Online since:

July 2011

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