Optimization of laser parameters and dimple geometry using PCA-coupled gRG

Kandasamy Ganesan, Saravanan (author), Thanigaivelan, Rajasekaran (author)

Stainless steel (SS316L) is applied in numerous fields due to its intrinsic properties. In this study, micro-dimples were fabricated on SS316L. The effects of laser process parameters, such as frequency, average power, and pulse duration, on the average dimple diameter, dimple distance, and dimple depth were studied using an L9 orthogonal array. The analysis of variance (ANOVA) and multi-objective optimization technique, principal-component-analysis-coupled grey relational grade (GRG), was used to optimize laser process parameters on output responses. The optimal machining parameter settings obtained for the highest GRG peak value of 0.2642 are 15 kHz (frequency), 12 W (average power), and 1500 ns (pulse duration). The ANOVA results showed that average power is the most influential factor, contributing 86.40 % to performance measures (average dimple diameter (%), dimple distance (d), and depth (l). Moreover, the effect of process parameters was studied using mean effect plots, and the micro-dimple quality was analysed using SEM micrographs.

• Language: English
• Keywords: lasers, micro-dimples, principal component analysis, grey relational grade, stainless steels
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: Str. 525-533
• Numbering: Vol. 67, no. 10
• PID: 20.500.12556/RUL-132547
• UDC: 669.14.018.8:535
• ISSN on article: 0039-2480
• DOI: 10.5545/sv-jme.2021.7246
• COBISS.SI-ID: 82700291
• Publication date in RUL: 28.10.2021

Record is a part of a journal

• Title: Strojniški vestnik
• Shortened title: Stroj. vestn.
• Publisher: Zveza strojnih inženirjev in tehnikov Slovenije [etc.], = Association of Mechanical Engineers and Technicians of Slovenia [etc.
• ISSN: 0039-2480
• COBISS.SI-ID: 762116

Secondary language

• Language: Slovenian
• Title: Optimizacija parametrov laserske obdelave in geometrije jamic po kombinirani metodi PCA-GRG
• Keywords: laserji, mikrojamice, analiza glavnih komponent, siva relacijska stopnja, nerjavna jekla