TY - JOUR
T1 - Ultrasonic Vibration-Assisted Laser Engineered Net Shaping of Inconel 718 Parts
T2 - A Feasibility Study
AU - Ning, Fuda
AU - Hu, Yingbin
AU - Liu, Zhichao
AU - Cong, Weilong
AU - Li, Yuzhou
AU - Wang, Xinlin
N1 - Publisher Copyright:
© 2017
PY - 2017
Y1 - 2017
N2 - Laser engineered net shaping (LENS) has been applied as a key technology in direct manufacturing or repairing of high added- value metal parts. Recently, many investigations on LENS manufacturing of Inconel 718 parts have been conducted for potential applications of the aircraft turbine component manufacturing or repairing. However, fabrication defects such as pores, cavities, and heterogeneous microstructures always exist in the parts, affecting part qualities and mechanical properties. Therefore, it is crucial to LENS-manufacture Inconel 718 parts in a high-quality and high-efficiency way. Ultrasonic vibration has been introduced into various melting metal solidification processes for process improvements. However, there are no reported investigations on ultrasonic vibration-assisted (UV-A) LENS of Inconel 718 parts. In this paper, for the first time, UV-A LENS is proposed to reduce the fabrication defects of Inconel 718 parts. The experimental investigation is conducted to study the effects of ultrasonic vibration on microstructures and microhardness of the parts fabricated by UV-A LENS and LENS without ultrasonic vibration. The results showed that ultrasonic vibration could reduce the porosity, refine the microstructure with a smaller average grain size, and fragment the detrimental phase with a uniform distribution, thus enhancing the microhardness of the fabricated parts.
AB - Laser engineered net shaping (LENS) has been applied as a key technology in direct manufacturing or repairing of high added- value metal parts. Recently, many investigations on LENS manufacturing of Inconel 718 parts have been conducted for potential applications of the aircraft turbine component manufacturing or repairing. However, fabrication defects such as pores, cavities, and heterogeneous microstructures always exist in the parts, affecting part qualities and mechanical properties. Therefore, it is crucial to LENS-manufacture Inconel 718 parts in a high-quality and high-efficiency way. Ultrasonic vibration has been introduced into various melting metal solidification processes for process improvements. However, there are no reported investigations on ultrasonic vibration-assisted (UV-A) LENS of Inconel 718 parts. In this paper, for the first time, UV-A LENS is proposed to reduce the fabrication defects of Inconel 718 parts. The experimental investigation is conducted to study the effects of ultrasonic vibration on microstructures and microhardness of the parts fabricated by UV-A LENS and LENS without ultrasonic vibration. The results showed that ultrasonic vibration could reduce the porosity, refine the microstructure with a smaller average grain size, and fragment the detrimental phase with a uniform distribution, thus enhancing the microhardness of the fabricated parts.
KW - Inconel 718 alloy
KW - Laser engineered net shaping (LENS)
KW - Microhardness
KW - Microstructures
KW - Ultrasonic vibration
UR - http://www.scopus.com/inward/record.url?scp=85023626341&partnerID=8YFLogxK
U2 - 10.1016/j.promfg.2017.07.074
DO - 10.1016/j.promfg.2017.07.074
M3 - Article
AN - SCOPUS:85023626341
VL - 10
SP - 771
EP - 778
JO - Procedia Manufacturing
JF - Procedia Manufacturing
SN - 2351-9789
ER -