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

Fuda Ning; Weilong Cong

doi:10.1016/j.matlet.2016.05.055

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

Fuda Ning, Weilong Cong

Industrial Engineering

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	61-64
Number of pages	4
Journal	Materials Letters
Volume	179
DOIs	https://doi.org/10.1016/j.matlet.2016.05.055
State	Published - Sep 15 2016

Keywords

Laser engineered net shaping
Mechanical properties
Microstructure
Powder technology
Ultrasonic vibration

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

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.",

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AU - Ning, Fuda

AU - Cong, Weilong

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N2 - 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.

AB - 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.

KW - Laser engineered net shaping

KW - Mechanical properties

KW - Microstructure

KW - Powder technology

KW - Ultrasonic vibration

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