Real-time detection of cooling rate using pyrometers in tandem in laser material processing and directed energy deposition

Nair, Amal M. and Muvvala, Gopinath and Sarkar, Sagar and Nath, Ashish Kumar (2020) Real-time detection of cooling rate using pyrometers in tandem in laser material processing and directed energy deposition. Materials Letters, 277 (128330). pp. 1-4. ISSN 0167-577X

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Abstract

A novel method of monitoring cooling rates in real-time using two pyrometers arranged in tandem has been demonstrated. First pyrometer monitors the temperature at the center of the molten pool, second monitors the temperature at its tailing end. The difference in two pyrometer signals provides the temperature gradient at 1 kHz frequency from which cooling rate is determined in real-time using Arduino interface. Effectiveness of this method in real-time monitoring of cooling rate during laser remelting and additive manufacturing by directed energy deposition with varying process parameters and layer number is demonstrated. © 2020 Elsevier B.V.

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IITH Creators:

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

Item Type:

Article

Additional Information:

Authors gratefully acknowledge the financial support from Department of Science and Technology, Government of India, under the FIST Program-2007 (SR/FIST/ETII-031/2007), Ministry of Human Resource Development and Department of Heavy Industries, Government of India, under the IMPRINT Program-2017 for Project-6917 and Science and Engineering Research Board , under the startup research grant program ( SRG/2019/000153 ).

Uncontrolled Keywords:

Additive Manufacturing; Cooling rate; Directed energy deposition; Laser processing; Morphology; Real-time detection

Subjects:

Physics > Mechanical and aerospace

Divisions:

Department of Mechanical & Aerospace Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

18 Nov 2022 15:22

Last Modified:

18 Nov 2022 15:22