Abstract
Unsatisfactory corrosion resistance is one of the major disadvantages of magnesium alloys that impede their wide application. Microstructural changes, especially grain sizes, of Mg alloys have significant influence on their corrosion resistance. Cryogenic machining was reported to effectively induce grain refinement on Mg alloys and has a potential to improve their corrosion resistance. It is important to model these changes so that proper machining conditions can be found to enhance the corrosion rate of Mg alloys. In this paper, a preliminary study was conducted to model the microstructural changes of AZ31B Mg alloy during dry and cryogenic machining using the finite element (FE) method and a user subroutine based on the dynamic recrystallization (DRX) mechanism of Mg alloys. Good agreement in terms of grain size and affected layer thickness was found between experimental and predicted results. A numerical study was conducted using this model to investigate the influence of rake angle on microstructural changes after cryogenic machining.
| Original language | English |
|---|---|
| Pages (from-to) | 335-343 |
| Number of pages | 9 |
| Journal | Journal of Manufacturing Processes |
| Volume | 16 |
| Issue number | 2 |
| DOIs | |
| State | Published - Apr 2014 |
Bibliographical note
Funding Information:This work was funded by and conducted in the Institute of Sustainable Manufacturing at the University of Kentucky, USA. The authors would like to thank Air Products and Chemicals for providing the ICEFLY ® liquid nitrogen delivery system.
Keywords
- Cryogenic machining
- Dynamic recrystallization (DRX)
- Finite element method (FEM)
- Mg alloy
- Microstructrual changes
ASJC Scopus subject areas
- Strategy and Management
- Management Science and Operations Research
- Industrial and Manufacturing Engineering