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Single and Multi-Response Optimization for Laser Micromachining of Al 7075 Alloy


Affiliations
1 Department of Mechanical Engineering, NERIST, ltanagar-791109, India
 

Al 7075 alloy is one of the strongest aluminium alloys having good fatigue strength and durability property. Its density is of 2.810 g/cm3. Zinc is the primary alloying element along with other elements such as magnesium, copper, chromium, iron and other elements. Innovative material development, strict design criteria, and complicated and entangled work sizes necessitate the use of non-traditional machining techniques. One such method for sculpting a wide variety of engineering materials is laser micromachining. In present research, laser micro-machining is conducted on Al 7075 alloy. The Design of experiment (DoE) is performed using Response Surface Methodology (RSM). Here, Kerf Width (KW) and heat affected zone (HAZ) are investigated by varying Laser Beam Power (LBP), Pulse Frequency (PF) and Scanning Speed (SS). Regression models for KW and HAZ are generated to observe the effects of process parameters. Also, using RSM, both single and multi-objective optimization is performed.

Keywords

Laser Micro-machining, Al 7075 Alloy, Response Surface Method, Regression Model, Optimization.
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  • Single and Multi-Response Optimization for Laser Micromachining of Al 7075 Alloy

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Authors

Samrat Choudhury
Department of Mechanical Engineering, NERIST, ltanagar-791109, India
Kajal Kumar Mandal
Department of Mechanical Engineering, NERIST, ltanagar-791109, India

Abstract


Al 7075 alloy is one of the strongest aluminium alloys having good fatigue strength and durability property. Its density is of 2.810 g/cm3. Zinc is the primary alloying element along with other elements such as magnesium, copper, chromium, iron and other elements. Innovative material development, strict design criteria, and complicated and entangled work sizes necessitate the use of non-traditional machining techniques. One such method for sculpting a wide variety of engineering materials is laser micromachining. In present research, laser micro-machining is conducted on Al 7075 alloy. The Design of experiment (DoE) is performed using Response Surface Methodology (RSM). Here, Kerf Width (KW) and heat affected zone (HAZ) are investigated by varying Laser Beam Power (LBP), Pulse Frequency (PF) and Scanning Speed (SS). Regression models for KW and HAZ are generated to observe the effects of process parameters. Also, using RSM, both single and multi-objective optimization is performed.

Keywords


Laser Micro-machining, Al 7075 Alloy, Response Surface Method, Regression Model, Optimization.

References





DOI: https://doi.org/10.21843/reas%2F2022%2F39-47%2F222962