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Wear characteristics of ultra-hard cutting tools when machining austempered ductile iron

Polishetty, Ashwin, Goldberg, Moshe and Littlefair, Guy 2010, Wear characteristics of ultra-hard cutting tools when machining austempered ductile iron, International journal of mechanical and mechatronics engineering, vol. 10, no. 1, pp. 1-6.

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Title Wear characteristics of ultra-hard cutting tools when machining austempered ductile iron
Author(s) Polishetty, AshwinORCID iD for Polishetty, Ashwin orcid.org/0000-0002-8572-6024
Goldberg, Moshe
Littlefair, Guy
Journal name International journal of mechanical and mechatronics engineering
Volume number 10
Issue number 1
Start page 1
End page 6
Total pages 6
Publisher IJENS Publisher
Place of publication Rawalpindi, India
Publication date 2010-02
ISSN 2077-124X
Keyword(s) ADI
cutting force analysis
surface texture analysis
tool wear analysis
Summary Nodularised Ductile Cast Iron, when subjected to heat treatment processes - austenitising and austempering produces Austempered Ductile Iron (ADI). The microstructure of ADI also known as "ausferrite" consists of ferrite, austenite and graphite nodules. Machining ADI using conventional techniques is often a problematic issue due to the microstructural phase transformation from austenite to martensite during machining. This paper evaluates the wear characteristics of ultra hard cutting tools when machining ADI and its effect on machinability. Machining trials consist of turning ADI (ASTMGrade3) using two sets of PCBN tools with 90% and 50% CBN content and two sets of ceramics tools; Aluminium Oxide Titanium Carbide and Silicon Carbide - whisker reinforced Ceramic. The cutting parameters chosen are categorized as roughing and finishing conditions; the roughing condition comprises of constant cutting speed (425 m/min) and depth of cut (2mm) combined with variable feed rates of 0.1, 0.2, 0.3 and 0.4mm/rev. The finishing condition comprises of constant cutting speed (700 m/min) and depth of cut (0.5mm) combined with variable feed rates of 0.1, 0.2, 0.3 and 0.4mm/rev. The benchmark condition to evaluate the performance of the cutting tools was tool wear evaluation, surface texture analysis and cutting force analysis. The paper analyses thermal softening of the workpiece by the tool and its effect on the shearing mechanism under rough and finish machining conditions in term of lower cutting forces and enhanced surface texture of the machined part.
Language eng
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2010, IJENS Publisher
Persistent URL http://hdl.handle.net/10536/DRO/DU:30045766

Document type: Journal Article
Collections: School of Engineering
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.