Kinetics of Austenite Formation in a Medium-Carbon, Low-Alloy Steel with an Initial Martensite Microstructure: Influence of Prior Austenite Grain Size
The impact of prior austenite grain size (PAGS) on the kinetics of austenite formation with an initial martensite microstructure was investigated in a medium-carbon, low-alloy steel. Two distinct PAGS of 117 and 330 μm, representing the range of grain sizes encountered in industries, were considered...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-01-01
|
| Series: | Journal of Manufacturing and Materials Processing |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2504-4494/9/1/10 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832588271464480768 |
|---|---|
| author | Navneeth Rajakrishnan Morteza Sadeghifar Pinaki Bhattacharjee Henri Champliaud Mohammad Jahazi |
| author_facet | Navneeth Rajakrishnan Morteza Sadeghifar Pinaki Bhattacharjee Henri Champliaud Mohammad Jahazi |
| author_sort | Navneeth Rajakrishnan |
| collection | DOAJ |
| description | The impact of prior austenite grain size (PAGS) on the kinetics of austenite formation with an initial martensite microstructure was investigated in a medium-carbon, low-alloy steel. Two distinct PAGS of 117 and 330 μm, representing the range of grain sizes encountered in industries, were considered. In this analysis, high-resolution dilatometry was used to study the formation of austenite during continuous heating experiments. The analysis of the dilatometry results revealed that grain refinement accelerated the rate of austenite formation without impacting its austenite formation temperature. Intermittent quenching tests were conducted to elucidate the nucleation and growth mechanisms of austenite formation using a combination of optical, scanning electron microscopy (SEM), and electron backscatter diffraction (EBSD). The differences in austenite formation kinetics as a function of prior austenite grain size were quantified and modeled in the framework of diffusion-controlled nucleation and growth theories using the genetic algorithm optimization. |
| format | Article |
| id | doaj-art-4ac0343551b34d328dcb45582e5a9e27 |
| institution | Kabale University |
| issn | 2504-4494 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Manufacturing and Materials Processing |
| spelling | doaj-art-4ac0343551b34d328dcb45582e5a9e272025-01-24T13:36:26ZengMDPI AGJournal of Manufacturing and Materials Processing2504-44942025-01-01911010.3390/jmmp9010010Kinetics of Austenite Formation in a Medium-Carbon, Low-Alloy Steel with an Initial Martensite Microstructure: Influence of Prior Austenite Grain SizeNavneeth Rajakrishnan0Morteza Sadeghifar1Pinaki Bhattacharjee2Henri Champliaud3Mohammad Jahazi4Department of Mechanical Engineering, École de Technologie Supérieure, Montreal, QC H3C 1K3, CanadaDepartment of Mechanical Engineering, École de Technologie Supérieure, Montreal, QC H3C 1K3, CanadaDepartment of Materials Science and Metallurgical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy 502285, Telengana, IndiaDepartment of Mechanical Engineering, École de Technologie Supérieure, Montreal, QC H3C 1K3, CanadaDepartment of Mechanical Engineering, École de Technologie Supérieure, Montreal, QC H3C 1K3, CanadaThe impact of prior austenite grain size (PAGS) on the kinetics of austenite formation with an initial martensite microstructure was investigated in a medium-carbon, low-alloy steel. Two distinct PAGS of 117 and 330 μm, representing the range of grain sizes encountered in industries, were considered. In this analysis, high-resolution dilatometry was used to study the formation of austenite during continuous heating experiments. The analysis of the dilatometry results revealed that grain refinement accelerated the rate of austenite formation without impacting its austenite formation temperature. Intermittent quenching tests were conducted to elucidate the nucleation and growth mechanisms of austenite formation using a combination of optical, scanning electron microscopy (SEM), and electron backscatter diffraction (EBSD). The differences in austenite formation kinetics as a function of prior austenite grain size were quantified and modeled in the framework of diffusion-controlled nucleation and growth theories using the genetic algorithm optimization.https://www.mdpi.com/2504-4494/9/1/10austenitemartensitekineticsmathematical modelphase transformationprior austenite grains |
| spellingShingle | Navneeth Rajakrishnan Morteza Sadeghifar Pinaki Bhattacharjee Henri Champliaud Mohammad Jahazi Kinetics of Austenite Formation in a Medium-Carbon, Low-Alloy Steel with an Initial Martensite Microstructure: Influence of Prior Austenite Grain Size Journal of Manufacturing and Materials Processing austenite martensite kinetics mathematical model phase transformation prior austenite grains |
| title | Kinetics of Austenite Formation in a Medium-Carbon, Low-Alloy Steel with an Initial Martensite Microstructure: Influence of Prior Austenite Grain Size |
| title_full | Kinetics of Austenite Formation in a Medium-Carbon, Low-Alloy Steel with an Initial Martensite Microstructure: Influence of Prior Austenite Grain Size |
| title_fullStr | Kinetics of Austenite Formation in a Medium-Carbon, Low-Alloy Steel with an Initial Martensite Microstructure: Influence of Prior Austenite Grain Size |
| title_full_unstemmed | Kinetics of Austenite Formation in a Medium-Carbon, Low-Alloy Steel with an Initial Martensite Microstructure: Influence of Prior Austenite Grain Size |
| title_short | Kinetics of Austenite Formation in a Medium-Carbon, Low-Alloy Steel with an Initial Martensite Microstructure: Influence of Prior Austenite Grain Size |
| title_sort | kinetics of austenite formation in a medium carbon low alloy steel with an initial martensite microstructure influence of prior austenite grain size |
| topic | austenite martensite kinetics mathematical model phase transformation prior austenite grains |
| url | https://www.mdpi.com/2504-4494/9/1/10 |
| work_keys_str_mv | AT navneethrajakrishnan kineticsofausteniteformationinamediumcarbonlowalloysteelwithaninitialmartensitemicrostructureinfluenceofprioraustenitegrainsize AT mortezasadeghifar kineticsofausteniteformationinamediumcarbonlowalloysteelwithaninitialmartensitemicrostructureinfluenceofprioraustenitegrainsize AT pinakibhattacharjee kineticsofausteniteformationinamediumcarbonlowalloysteelwithaninitialmartensitemicrostructureinfluenceofprioraustenitegrainsize AT henrichampliaud kineticsofausteniteformationinamediumcarbonlowalloysteelwithaninitialmartensitemicrostructureinfluenceofprioraustenitegrainsize AT mohammadjahazi kineticsofausteniteformationinamediumcarbonlowalloysteelwithaninitialmartensitemicrostructureinfluenceofprioraustenitegrainsize |