Evaluation of microstructure and thermal history for TiC/Inconel 625 MMC deposition through pre-placed laser cladding method with and without the application of ultrasonic vibration

Muvvala, Gopinath (2023) Evaluation of microstructure and thermal history for TiC/Inconel 625 MMC deposition through pre-placed laser cladding method with and without the application of ultrasonic vibration. CIRP Journal of Manufacturing Science and Technology, 41. pp. 453-464. ISSN 1755-5817

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Abstract

The current work presents the deposition of TiC/ Inconel 625 metal matrix composites (MMC) coating through pre-placed powder bed laser cladding method using a Yb-Fiber laser, under two different conditions, with and without the application of ultrasonic vibration to the work-piece with frequency ranging from 28 to 34 kHz. The disintegration of the TiC particles and its distribution in the matrix was observed under various process parameters (laser power, scan speed and vibration frequency), and the microstructural changes were correlated with the molten pool lifetime obtained from the temperature history of the clad layer, captured using an IR-Pyrometer. The laser cladding without the application of vibration was conducted under constant and variable line energy to study the effect of laser interaction time and laser power on the microstructural evolution under fixed and variable heat flux. Higher molten pool lifetime (due to slow scan speed) at constant laser power resulted in higher disintegration of the MMC particles and formation of dendrites, whereas higher laser power under constant heat flux also resulted the same. Further, the application of ultrasonic vibration, specifically a higher vibration amplitude (at lower vibration frequency) was found to be responsible for more uniform distribution of TiC particles due to breaking of agglomerates, which led to higher hardness.

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IITH Creators:

IITH Creators	ORCiD
Muvvala, Gopinath	http://www.orcid.org/0000-0002-2133-3686

Item Type:

Article

Uncontrolled Keywords:

Inconel 625; Laser cladding; Metal matrix composite; Pre-placed; Thermal history; TiC; Ultrasonic vibration; Disintegration; Fiber lasers; Heat flux; Laser cladding; Metallic matrix composites; Ultrasonic effects; Ultrasonic waves; Inconel 625; Laser power; Matrix composite; Metal matrix; Metal matrix composite; Pre-placed; Scan speed; Thermal history; TiC particles; Ultrasonic-vibration; Titanium carbide

Subjects:

Physics > Mechanical and aerospace
Physics

Divisions:

Department of Mechanical & Aerospace Engineering

Depositing User:

Mr Nigam Prasad Bisoyi

Date Deposited:

15 Sep 2023 06:37

Last Modified:

15 Sep 2023 06:37

URI:

http://raiithold.iith.ac.in/id/eprint/11683