Analyzing the effect of the parameters of laser etching process influencing the corrosion resistance and surface roughness of marine grade 316 stainless steel Aditya Korakana a , Sparsha Korakana b , Nitin Ulmek a , Ajay Kumar Pagare c,⇑ a Dept. of Mechanical Engineering at Indira College of Engineering and Management, Savitribai Phule Pune University, Pune, India b Dept. of Production Engineering at D.Y Patil Colloege of Engineering Savitribai Phule Pune University, Pune, India c Department of Mechanical Engineering in School of Engineering at Jaipur National University Jaipur, India article info Article history: Received 25 January 2020 Received in revised form 8 February 2020 Accepted 11 February 2020 Available online xxxx Keywords: Laser etching Stainless steel Nd YAG laser Taguchi method Surface roughness Heat input abstract Laser etching process is used for marking those materials which cannot be marked by conventional machining processes. The aim of the current study attempts to investigate the effects of Laser etching parameters specially the scanning speed [ns], peak power [kW], frequency [kHz] and heat input [J/ mm 2 ] on the corrosion resistance and variations in surface roughness properties of the Marine grade 316 Stainless Steel. In the laser etching process the surface of the material is incident by a laser beam which heats up the marked area and subsequently vaporizes the material leading to formation of oxide layer on the surface, which when comes in contact with aggressive environment causes a chemical reac- tion on the bare steel leading to corrosion. The experiment was performed after marking on the material surface body with Nd: YAG Solid State UV Laser beam using Laser annealing process. Surface roughness is an important parameter that affects the tribological behavior of surfaces. In the food processing industry the ’316 0 grades are unofficially known as the ’food’ grades because the lower the surface roughness, the better, since corrosive material and bacteria are less likely to stick to a very smooth surface. The samples were subjected to salt spray test to check corrosion resistance of materials. Taguchi method of orthogonal array based on Minitab 18 was used to determine the best factor level condition. Marking quality was evaluated by visual examination. Analysis of variance (ANOVA) has been applied on experimental data to identify the relative significance of process parameters on the response. The analysis shows that the laser beam scanning speed is the most influential operating factor. Ó 2020 Elsevier Ltd. All rights reserved. Selection and Peer-review under responsibility of the scientific committee of the Innovative Advance- ment in Engineering & Technology. 1. Introduction Laser has been widely used in cutting and welding operations, recently, due to the introduction of laser sources characterized by short and ultra-short pulses ranging from nanosecond to fem- tosecond duration his technology has been adopted in other indus- trial processes like marking, selective ablation and machining of different materials [1]. Laser marking is a new marking method, it is a process to make a mark on a product for the purpose of pro- duct identification. There are many marking methods, such as Laser annealing, ink-marking, mechanical engraving, foaming, col- oration, electro-chemical methods, etc. Due to the many advan- tages in laser marking process as compared with conventional marking methods, such as no wear on tools, high degree of automation, free programming and choice of characters, this tech- nique is widely used for marking [2]. Lasers used in industry for marking include TEA CO2 lasers, pulsed or Q-switched Nd: YAG lasers and excimer lasers. In recent years, some laser marking experiments with different lasers have been reported. C. Leone et al. [1] has carried out Laser marking tests to determine the relation between working parameters (i.e. pulse frequency, beam scanning speed, and current intensity) and the resulting mark visibility on AISI 304 steel, using a Q-switched diode pumped Nd-YAG laser. Michak et al. [3] used pulsed lasers-q-switched YAG laser and pulsed fiber laser in order to study an unambiguous relationship between laser parameters and surface roughness. The surface morphology of laser colour https://doi.org/10.1016/j.matpr.2020.02.130 2214-7853/Ó 2020 Elsevier Ltd. All rights reserved. Selection and Peer-review under responsibility of the scientific committee of the Innovative Advancement in Engineering & Technology. ⇑ Corresponding author. E-mail address: pagareajay8@jnujaipur.ac.in (A.K. Pagare). Materials Today: Proceedings xxx (xxxx) xxx Contents lists available at ScienceDirect Materials Today: Proceedings journal homepage: www.elsevier.com/locate/matpr Please cite this article as: A. Korakana, S. Korakana, N. Ulmek et al., Analyzing the effect of the parameters of laser etching process influencing the corrosion resistance and surface roughness of marine grade 316 stainless steel, Materials Today: Proceedings, https://doi.org/10.1016/j.matpr.2020.02.130