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  Scopus ID: 21100926589

Exploring the Material Removal Rate of a Novel AlZn 5Mg Alloy Through Experiments with Cubic Boron Nitride Coated and Uncoated HSS Tools

Challa Kanthi Siddardha and Rathinavelu Venkatesh


Aim: This research delves into the material removal rate (MRR) of Al-Zn5Mg alloy when subjected to computer numerical control (CNC) turning. The investigation involves the use of inserts that are coated with cubic boron nitride (CBN) and high-speed steel (HSS).
Methodology: In this study, we’re focusing on an Al-Zn5Mg alloy that’s 200 mm long and has a diameter of 50 mm. To conduct the investigation, we prepared 20 samples of this alloy (N = 20). These samples were crafted using both a CBN-covered HSS insert (considered the experimental group) and an uncovered HSS tool (the control group). After the machining process, the weight of each set of samples was determined using a digital weight-measuring machine by ASTM standards. We then carried out G-power calculations with an 80% threshold.
Results: The research findings on the MRR for Al-Zn5Mg alloy, when machined with a CBN-covered HSS insert, show a rate of 1.801 mm3/min. In comparison, the MRR for HSS tools without coverage is lower, measuring at 1.624 mm3/min. Through in-depth investigations employing statistical analyses, particularly utilizing SPSS and analysis of variance (ANOVA) t-tests, it has been unveiled that there exists a noteworthy distinction between the two groups in question. The derived two-tailed significance value of 0.001 (p < 0.05) attests to the statistical significance of this disparity. Conclusion: In this experimental study, the utilization of a CBN-coated HSS inserts for turning Al-Zn5Mg alloys proved to significantly boost the MRR compared to the samples turned with an uncoated HSS insert, operating within the study’s constraints.

Published on: October 26, 2023
doi: 10.17756/nwj.2023-s3-105
Citation: Siddardha CK, Venkatesh R. 2023. Exploring the Material Removal Rate of a Novel Al-Zn5Mg Alloy Through Experiments with Cubic Boron Nitride Coated and Uncoated HSS Tools. NanoWorld J 9(S3): S579-S584.

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