Pulsed Nd:YAG Laser Micro-turning Process of Alumina Ceramics

2015 ◽  
pp. 343-380 ◽  
Author(s):  
G. Kibria ◽  
B. Doloi ◽  
B. Bhattacharyya
Keyword(s):  
Nd:Yag Laser ◽  
Alumina Ceramics ◽  
Turning Process ◽  
Pulsed Nd:Yag Laser ◽  
Micro Turning

Experimental Investigation into Pulsed Nd:YAG Laser Micro-Turning of Engineering Ceramics

2011 ◽  
Vol 264-265 ◽  
pp. 1318-1323 ◽  
Author(s):  
G. Kibria ◽  
B. Sharma ◽  
B. Doloi ◽  
B. Bhattacharyya
Keyword(s):  
Nd:Yag Laser ◽  
Biomedical Applications ◽  
Pulse Frequency ◽  
Depth Of Cut ◽  
Turning Process ◽  
Laser Beam Machining ◽  
Pulsed Nd:Yag Laser ◽  
Engineering Ceramics ◽  
Lamp Current ◽  
Micro Turning

Laser beam machining (LBM) is the most exciting thermal energy based non-contact type advanced material machining method to process almost whole range of materials. The laser microturning of ceramics are highly demanded in the present industries because of its wide and potential uses in various engineering fields such as automobile, electronics, aerospace, biomedical applications etc. The present paper addresses the basic experimental study of Nd:YAG laser microturning of advanced engineering cylindrical shaped ceramic material to explore the desired laser output responses i.e. depth of cut and surface roughness by varying laser micro-turning process parameters such as lamp current, pulse frequency and rotational speed of workpiece etc.

Parametric Study and Optimization of Nd: YAG Laser Micro-Turning Process of Different Grade of Alumina Ceramics Based on Taguchi Methodology

2014 ◽  
Vol 2 (1) ◽  
pp. 15-46 ◽  
Author(s):  
G. Kibria ◽  
B. Doloi ◽  
B. Bhattacharyya
Keyword(s):  
Surface Roughness ◽  
Process Parameters ◽  
Average Power ◽  
Pulse Frequency ◽  
Optimum Process ◽  
Taguchi Methodology ◽  
Alumina Ceramics ◽  
Turning Process ◽  
Micro Turning ◽  
Cylindrical Workpiece

The present paper addresses an investigation on the effect of process parameters during Nd:YAG laser micro-turning operation of different grade of alumina (Al2O3) ceramic materials. Considering different levels of various process parameters i.e. laser beam average power, pulse frequency, workpiece rotational speed and Y feed rate, Taguchi method based experimental design has been used to construct the set of experiments. The same set of experiments has been utilized to machine 10 mm diameter cylindrical workpiece made of different grades of Alumina ceramics i.e. K60 and K80. Surface roughness (Ra) and micro-turning depth deviation were considered as the process characteristics. Analysis of variance (ANOVA) test was performed for each grade of alumina ceramic to find out the significant process parameters during laser micro-turning process. The optimum process parameters settings for individual responses were obtained by analyzing the signal-to-noise (S/N) ratio. Mathematical models, which correlate the response and process variables, have been developed for all the grades of ceramics. Multi-objective optimization i.e. simultaneous minimization of surface roughness (Ra) and micro-turning depth deviation has been done through combined approach of Taguchi methodology and Grey Relational Analysis.

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