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Experimental and finite element analysis of machinability of AL-6XN super austenitic stainless steel

Alabdullah, Mohanad, Polishetty, Ashwin, Nomani, Junior and Littlefair, Guy 2016, Experimental and finite element analysis of machinability of AL-6XN super austenitic stainless steel, International journal of advanced manufacturing technology, In Press, pp. 1-16, doi: 10.1007/s00170-016-9766-y.

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Title Experimental and finite element analysis of machinability of AL-6XN super austenitic stainless steel
Author(s) Alabdullah, MohanadORCID iD for Alabdullah, Mohanad
Polishetty, AshwinORCID iD for Polishetty, Ashwin
Nomani, Junior
Littlefair, Guy
Journal name International journal of advanced manufacturing technology
Season In Press
Start page 1
End page 16
Total pages 16
Publisher Springer
Place of publication Berlin, Germany
Publication date 2016-11-23
ISSN 0268-3768
Keyword(s) machinability
super austenitic stainless steel
quick stop
chip root
finite element analysis
Summary This paper presents a finite element cutting modelbased on physical microstructure to investigate the thermomechanicalbehaviour of AL-6XN Super AusteniticStainless Steel in the primary shear zone. Frozen chip rootsamples were created under dry turning operation to observethe plasticity behaviour occurring in the shear zones to comparewith the model for analysis. Chip samples were generatedunder cutting velocities at 65 and 94 m/min, feed rate at0.2 mm/rev and depth of cut at 1 mm. Temperature on thecutting zone was recorded by infrared thermal camera.Secondary and backscatter electron detectors were used toinvestigate the deformed microstructure and to calculate theplastic strain. Experimental results showed the formation ofmicrocracks (build-up edge triggers) at the chip root stagnationzone of both samples. The austenite phase patterns wereevident against the cutting tool tip in the stagnation zone of thechip root fabricated at 65 m/min. The movement of thesepatterns caused the formation of the slip lines within thegrains. The backscatter diffraction maps showed the formationof special grain boundaries within the slip lines, workhardeninglayer and in the chip region. Strain measurementsin the microstructures of the chip roots fabricated at 94 and65 m/min showed high values of 6.5 and 5.7 (mm/mm) respectively.The finite element model was used to measure thestress, strain, temperature and chip morphology. Numericalresults were compared to the outcomes of the experimentalwork to validate the finite element model. The model validatingprocess showed good agreement between theexperimental and numerical results, and the error values werecalculated. For a 94- and 65-m/min cutting speeds, 7.5 and5.2% were the errors in the strain, 3 and 2.5% were the error inthe temperature and 4.7 and 6.8% were the error in the shearplane angles.
Language eng
DOI 10.1007/s00170-016-9766-y
Field of Research 091207 Metals and Alloy Materials
091299 Materials Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Springer
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Document type: Journal Article
Collection: School of Engineering
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