| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1641191 | Materials Letters | 2016 | 4 Pages |
•Fe-Cr parts were fabricated by ultrasonic vibration-assisted LENS process.•Porosity, micro-cracks, and grain size of the fabricated parts were decreased.•Tensile properties and microhardness of the fabricated parts were improved.•Ultrasonic vibration is beneficial to refine microstructure and improve property.
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.
