Assessment of surface morphology of laser engraved stainless steel

Alwi, Muhammad Haziq Zafrin (2022) Assessment of surface morphology of laser engraved stainless steel. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

In recent years, laser engravings have risen as one of the most promising technologies for engraving or branding an object. Laser machines are spesifically designed for engraving on different types of materials, cutting, ethcing, and marking. The parameters in this process play a significant role as the parameters changed, the output changes. The current research will be concentrating on analysing the line pattern surface when laser engraving on stainless steel with the goal of finding the best parameter. According to the results of this experiment, the effect of surface microstructure will be evaluated using the basic parameters of laser engraving, which are laser power, laser speed, laser frequency, and the number of loops in the engraving line. To begin, the software packages ImagR and EzCad will be utilised to generate a specified line. This was accomplished by engraving a stainless steel workpiece using the Master Oscillator Power Amplifier (MOPA) Fiber Laser employing a combination of specified settings to achieve best parameter on stainless steel for laser engraving line. An investigation into the relationship between laser engraving on stainless steel and a mixture of factors revealed that a combination of parameters, including frequency, power, speed, and loop count, was critical in getting the best parameter. Its purpose is to determine how laser parameters influenced the structural and metallurgical characteristics of stainless steel. It is also useful for analysing the microstructure of the heat affected zone, which is where the material has been damaged by laser heat during the engraving process.A high speed combined with the best feasible number for looping count and speed will have a significant influence. In the following step, a microstructure observations of a stainless steel that has been engraved using a Elecronic Microscopic digital USB will be performed. Microstructure observations of engraved lines in stainless steel resulting in information about the material's response to the laser engraving process. Graining size, microhardness, heat impacted zone, and phase transitions are among the observations recorded during microstructure study of engraved stainless steel.

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