Machinability and surface integrity of adhesively bonded Ti/CFRP/Ti hybrid composite laminates under dry and cryogenic conditions

Kumar, D and Gururaja, S and Jawahir, IS (2020) Machinability and surface integrity of adhesively bonded Ti/CFRP/Ti hybrid composite laminates under dry and cryogenic conditions. In: Journal of Manufacturing Processes, 58 . pp. 1075-1087.

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Abstract

The current work compares the machinability of conventional drilling of hybrid titanium/carbon fiber reinforced plastics/titanium (Ti/CFRP/Ti) stack laminates in a single shot under dry and cryogenic conditions. Damage at metal-composite interface (MCI), thrust force, torque, burr height, surface roughness, average hole size, circularity error, and perpendicularity error are considered as experimental outcomes to investigate the influence of cryogenic cooling on the machinability of Ti/CFRP/Ti stacks. The experimental outcomes indicate that the hole quality significantly improved under cryogenic condition compared to dry drilling for the range of drilling parameters chosen. However, cryogenic cutting yields an increased thrust force due to increase in the hardness of Ti sheet at low temperatures. Scanning acoustic microscopy (SAM) was capable of capturing damage at MCI. Scanning electron microscope (SEM) and micro-computed tomography (μ-CT) are also used to assess the drilling induced damages on hole wall surface under both (dry and cryogenic) conditions. © 2020 The Society of Manufacturing Engineers

Item Type:	Journal Article
Publication:	Journal of Manufacturing Processes
Publisher:	Elsevier Ltd
Additional Information:	copyright for this article belongs to Elsevier Ltd
Keywords:	Adhesives; Boreholes; Computerized tomography; Fiber reinforced plastics; Infill drilling; Laminated composites; Machinability; Scanning electron microscopy; Surface roughness, Circularity errors; Conventional drilling; Cryogenic conditions; Cryogenic cuttings; Drilling parameters; Hybrid composite laminate; Microcomputed tomography; Scanning Acoustic Microscopy, Cryogenics
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	18 Nov 2020 11:19
Last Modified:	18 Nov 2020 11:19
URI:	http://eprints.iisc.ac.in/id/eprint/66902

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