Microstructures and mechanical properties of Fe-Cr stainless steel parts fabricated by ultrasonic vibration-assisted laser engineered net shaping process

Fuda Ning, Weilong Cong

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

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 languageEnglish
Pages (from-to)61-64
Number of pages4
JournalMaterials Letters
Volume179
DOIs
StatePublished - Sep 15 2016

Keywords

  • Laser engineered net shaping
  • Mechanical properties
  • Microstructure
  • Powder technology
  • Ultrasonic vibration

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