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Paul, Soumitra
- Performance of a Newly Developed Multiwalled Carbon Nanotube Reinforced Alumina Tool Insert during Turning of AISI 1060 Steel
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Authors
Affiliations
1 Department of Mechanical Engineering, Kalyani Govt Engineering College, Kalyani-741235, IN
2 NOCCD, CSIR-Central Glass & Ceramic Research Institute, Kolkata–700032, IN
3 Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur– 721302, IN
1 Department of Mechanical Engineering, Kalyani Govt Engineering College, Kalyani-741235, IN
2 NOCCD, CSIR-Central Glass & Ceramic Research Institute, Kolkata–700032, IN
3 Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur– 721302, IN
Source
Journal of the Association of Engineers, India, Vol 86, No 1-2 (2016), Pagination: 64-79Abstract
Due to the demand of the manufacturing industry for high production-rate machining, ceramic tool material plays an important role. In this work, alumina (Al2O3) matrix composite reinforced with 0.3 vol.% multiwalled carbon nanotubes (MWCNTs) was prepared by hot-press sintering at a temperature of 1550°C under uniaxial load of 2.5 MPa. This developed nanocomposite having increased hardness, fracture toughness and flexural strength compared to monolithic Al2O3 was then used as a cutting tool insert with a nose radius of 1 mm for machining AISI 1060 steel rod under different machining conditions. Cutting force was measured and chip forms were observed at different levels of machining parameters to evaluate the machining performance of the tool insert. Results obtained from turning experiments show promising applicability of the developed 0.3 vol.% MWCNT/Al2O3 cutting tool insert.Keywords
Machining, Turning, MWCNT, CNT, Al2o3, Nanocomposite, Carbon Nanotube, Cutting Force, Machinability, Cutting Tool.References
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- Modelling of Micro-Machining of Ti-6Al-4V: Strain Gradient Interpretation
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Authors
Affiliations
1 Indian Institute of Technology Kharagpur, Kharagpur, India., IN
1 Indian Institute of Technology Kharagpur, Kharagpur, India., IN
Source
Manufacturing Technology Today, Vol 22, No 4 (2023), Pagination: 32-38Abstract
Advances in computer methods over the last two decades have accelerated research in engineering sectors because of high computing power. Micro-machining is a manufacturing domain that is widely utilized for producing miniature components where predictability is a concern. The current work emphasized developing and executing a user-defined constitutive flow and friction models to simulate the physical phenomenon of chip morphology, residual stresses, and cutting forces during orthogonal machining at the micro-scale. The proposed model integrates strain gradient and dynamic recrystallization effect using a user hardening subroutine written in Fortran for machining of Ti-6Al-4V in micron scale. Furthermore, a user defined friction subroutine was implemented at the tool-chip interaction. A comparison is made between the modelling results and experiments in terms of specific cutting energy (SCE) and residual stresses.Keywords
Micro-Cutting, Residual Stress, Chip Morphology, Ti-6Al-4V.References
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