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WEDM Used for Machining High Entropy Alloys
Katerina Mouralova1, Libor Benes2, Radim Zahradnicek1
1Faculty of Mechanical Engineering, Brno University of Technology, 616 69 Brno, Czech Republic.
Materials (Basel, Switzerland)
|October 31, 2020
Summary
This study optimized wire electrical discharge machining (WEDM) for high entropy alloys (HEAs). Optimal parameters were identified for defect-free machining of FeCoCrMnNi and FeCoCrMnNiC0.2.
Area of Science:
- Materials Science
- Manufacturing Engineering
Background:
- Unconventional wire electrical discharge machining (WEDM) is crucial for processing advanced materials due to minimal mechanical property restrictions.
- High entropy alloys (HEAs) are emerging materials requiring novel machining approaches.
Purpose of the Study:
- To analyze the machinability of novel HEAs (FeCoCrMnNi and FeCoCrMnNiC0.2) using WEDM.
- To determine optimal WEDM parameters for efficient production of defect-free HEA components with desired surface quality.
Main Methods:
- An extensive design of experiments (66 rounds) was conducted.
- Investigated the influence of pulse off time, gap voltage, discharge current, pulse on time, and wire speed.
- Utilized topography, morphology, subsurface layer analysis, EDX, and TEM for comprehensive evaluation.
Main Results:
- Identified optimal machine parameter settings for WEDM of the studied HEAs.
- Achieved efficient machining of FeCoCrMnNi and FeCoCrMnNiC0.2.
- Ensured production of parts with required surface quality and without subsurface defects.
Conclusions:
- Optimal WEDM parameters enable defect-free machining of FeCoCrMnNi and FeCoCrMnNiC0.2 HEAs.
- This research provides a foundation for the industrial application of WEDM on advanced HEAs.
- The findings contribute to the efficient manufacturing of high-performance components from novel alloys.
