Abstract
| Language | English |
|---|---|
| Number of pages | 7 |
| Journal | Procedia Engineering |
| Publication status | Accepted/In press - 22 May 2017 |
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Keywords
- microstructural modelling, JMAK-type model, Nickel superalloys,
- validity analysis
- nickel superalloys
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Applicability of JMAK-type model for predicting microstructural evolution in nickel-based superalloys. / Bylja, Olga; Reshetov, Aleksey; Stefani, Nicola; Rosochowska, Malgorzata; Blackwell, Paul.
In: Procedia Engineering, 22.05.2017.Research output: Contribution to journal › Conference Contribution
TY - JOUR
T1 - Applicability of JMAK-type model for predicting microstructural evolution in nickel-based superalloys
AU - Bylja, Olga
AU - Reshetov, Aleksey
AU - Stefani, Nicola
AU - Rosochowska, Malgorzata
AU - Blackwell, Paul
PY - 2017/5/22
Y1 - 2017/5/22
N2 - The question of the prediction of microstructural transformation over a wide range of temperatures and strain rates is important for the simulation of industrial hot forging processes, especially those focused on net-shape forging. A large spectrum of microstructural models, from the simplest empirical and phenomenological forms to more complex physics-based ones were developed during last century; some of them were embedded into commercial software. However, in spite of some successful implementations, the problem of the robust prediction of microstructure development in the real multi-operational industrial processes remains in general unsolved. Complex models often suffer due to high computational cost, possible mathematical instability and ill-defined calibration techniques. Simple models are easier for practical use but, due to the nature of the simplifying assumptions, have a limited range of validity, which is almost never specified. JMAK-type models are one of the examples of the relatively simple mathematical model forms popular for the description a number of metallurgical processes. One of them is recrystallisation, which is one of the dominating mechanisms in the hot working of metals. In this paper, the wellknown family of 718 nickel-base superalloys and a range of forging trials of different levels of complexity were used to analyze the applicability of the JMAK-type models.
AB - The question of the prediction of microstructural transformation over a wide range of temperatures and strain rates is important for the simulation of industrial hot forging processes, especially those focused on net-shape forging. A large spectrum of microstructural models, from the simplest empirical and phenomenological forms to more complex physics-based ones were developed during last century; some of them were embedded into commercial software. However, in spite of some successful implementations, the problem of the robust prediction of microstructure development in the real multi-operational industrial processes remains in general unsolved. Complex models often suffer due to high computational cost, possible mathematical instability and ill-defined calibration techniques. Simple models are easier for practical use but, due to the nature of the simplifying assumptions, have a limited range of validity, which is almost never specified. JMAK-type models are one of the examples of the relatively simple mathematical model forms popular for the description a number of metallurgical processes. One of them is recrystallisation, which is one of the dominating mechanisms in the hot working of metals. In this paper, the wellknown family of 718 nickel-base superalloys and a range of forging trials of different levels of complexity were used to analyze the applicability of the JMAK-type models.
KW - microstructural modelling, JMAK-type model, Nickel superalloys,
KW - validity analysis
KW - nickel superalloys
UR - http://www.sciencedirect.com/science/journal/18777058
M3 - Conference Contribution
JO - Procedia Engineering
T2 - Procedia Engineering
JF - Procedia Engineering
SN - 1877-7058
ER -