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Metals 2017, 7(6), 197; doi:10.3390/met7060197

A Study on Cutting Force of Machining In Situ TiB2 Particle-Reinforced 7050Al Alloy Matrix Composites

The Key Laboratory of Contemporary Design and Integrated Manufacturing Technology, Ministry of Education, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, China
These authors contributed equally to this work.
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Author to whom correspondence should be addressed.
Academic Editor: Andrew Kennedy
Received: 22 February 2017 / Revised: 10 April 2017 / Accepted: 24 May 2017 / Published: 27 May 2017
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Abstract

In situ TiB2 particle-reinforced 7050Al alloy matrix composites are a new category of particulate metal matrix composites with improved mechanical and physical properties. At present, the study of machining in situ TiB2/Al composite is limited and no specific study has been presented on cutting force. Based on previous work, experimental investigation of cutting in situ TiB2/Al composite was carried out in this study to investigate the cutting force, shear angle, mean friction angle, and shear stress. The results indicated that the feed rate, instead of cutting speed, has a significant influence on the shear angle, mean friction angle, shear stress, and forces, which is different from cutting ex situ SiC/Al composites. Meanwhile, based on Merchant’s theory, a force model, which consists of chip formation and ploughing force, was established to have a better understanding of force generation. A comparison of the results show an acceptable agreement between the force model and experiments. Additionally, at varying feed rates, the linear relationship between the shear angle and mean friction angle is still suitable for cutting in situ TiB2/7050Al alloy composites. View Full-Text
Keywords: in situ; metal-matrix composites (MMCs); TiB2 particles; Al; cutting force; modeling in situ; metal-matrix composites (MMCs); TiB2 particles; Al; cutting force; modeling
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Xiong, Y.; Wang, W.; Jiang, R.; Lin, K. A Study on Cutting Force of Machining In Situ TiB2 Particle-Reinforced 7050Al Alloy Matrix Composites. Metals 2017, 7, 197.

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