A study on the effect of molten pool thermal history and gaseous environment in laser surface alloying of AISI 1020 steel with TiN

Pn V., G. and Vommi, V. and Choudhary, A. and Muvvala, G. (2021) A study on the effect of molten pool thermal history and gaseous environment in laser surface alloying of AISI 1020 steel with TiN. Optik, 245. p. 167758. ISSN 00304026

Full text not available from this repository. (Request a copy)

Abstract

Laser surface alloying (LSA) of AISI 1020 steel with TiN ceramic particles was carried out in argon and nitrogen environment at different laser scan speeds. The influence of these parameters on the distribution and decomposition of TiN particles in the alloyed layer was investigated using SEM and XRD analysis. Further, the molten pool thermal history during LSA was monitored using an IR pyrometer and the possibility of predicting TiN decomposition from the profile of recorded thermo-cycle is discussed. TiN particles were found to decompose during alloying process in argon environment which was suppressed in case of nitrogen environment. A combination of moderate scan speed and nitrogen environment resulted in a sound quality alloyed layer with uniform TiN distribution and minimum or no TiN decomposition. Further, wear test was carried out to investigate the effect of distribution and decomposition of ceramic particles.

[error in script]

IITH Creators:

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

Item Type:

Article

Uncontrolled Keywords:

Alloyed layers, Argon environment, Ceramics particles, Gaseous environments, Laser scan speed, Laser surface alloying, Molten pool, Nitrogen environment, Thermal history, TiN distribution

Subjects:

Physics > Mechanical and aerospace

Divisions:

Department of Mechanical & Aerospace Engineering

Depositing User:

Mrs Haseena VKKM

Date Deposited:

02 Nov 2021 10:55

Last Modified:

14 Mar 2022 06:37

URI:

http://raiithold.iith.ac.in/id/eprint/8885