Experimental and modelling study of the grain refinement of Fe-30wt%Ni-Nb austenite model alloy subjected to severe plastic deformation process
| Autor: | R. Kuziak, Dmytro Svyetlichnyy, Krzysztof Muszka, Janusz Majta |
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| Rok vydání: | 2021 |
| Předmět: |
Austenite
0209 industrial biotechnology Materials science Misorientation Wire drawing Mechanical Engineering 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 020901 industrial engineering & automation Grain boundary Deformation (engineering) Severe plastic deformation Composite material 0210 nano-technology Civil and Structural Engineering Electron backscatter diffraction |
| Zdroj: | Archives of Civil and Mechanical Engineering. 21 |
| ISSN: | 1644-9665 |
| DOI: | 10.1007/s43452-021-00178-7 |
| Popis: | This study addresses some aspects regarding a computer modelling based on three-dimensional Frontal Cellular Automata (FCA) for the simulation of ultrafine-grained (UFG) microstructure development in purpose-designed microalloyed austenite model alloy i.e. FCC structure. Proposed in the present study model is a step forward towards understanding the deformation and microstructure development mechanisms occurring during severe plastic deformation (SPD) processes with high accumulation of the plastic deformation effects in FCC structures. The analysed microalloyed austenite microstructures were developed due to SPD effects. Using the proposed computer model, based on three-dimensional FCA it has been shown that it is possible to predict some characteristics of the FCC microstructures such as the grain size and the distribution of the boundaries misorientation angle. These abilities were proved by the qualitative and quantitative comparisons of the modelling and SEM/EBSD results. The capabilities of the proposed model were tested using experimental results of the wire drawing processes. The paper presents the new original results of experimental studies of multi-staged MaxStrain technology with the microscopic investigation. Basing on data obtained from these studies, the dependencies of the evolution of grain structure and misorientation angle on the accumulative strain and cycle number were obtained in a form of approximation equations. The equations were implemented into the CA model, and MaxStrain technology was simulated. Comparison of the results obtained in experimental studies and simulations shows a satisfactory agreement. Industrial verification of the developed model as well shows a satisfactory agreement. |
| Databáze: | OpenAIRE |
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