Abstract
This paper studied fabrication of Fe-Cr stainless steel parts using the novel ultrasonic vibration-assisted laser engineered net shaping (UV-A LENS) process and investigated the effects of ultrasonic vibration on the microstructures and mechanical properties. The results showed that cross-sectional morphology as well as internal microstructure of the parts were changed by applying ultrasonic vibration in LENS process. Porosity, micro-cracks, and microstructural grain size were remarkably decreased due to the actions and influences of ultrasonic vibration. In addition, mechanical properties of the parts fabricated by UV-A LENS process were significantly improved compared with that of the parts fabricated by LENS without ultrasonic vibration. These findings indicated that UV-A LENS was an effective process to generate uniform morphology and fine microstructures to improve the mechanical properties of the parts.
Original language | English |
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Pages (from-to) | 61-64 |
Number of pages | 4 |
Journal | Materials Letters |
Volume | 179 |
DOIs | |
State | Published - Sep 15 2016 |
Keywords
- Laser engineered net shaping
- Mechanical properties
- Microstructure
- Powder technology
- Ultrasonic vibration