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Enhancing surface quality in cutting of gummy metals using nanoscale organic films.

Authors :
Issahaq, Mohammed Naziru
Udupa, Anirudh
Sugihara, Tatsuya
Mohanty, Debapriya Pinaki
Mann, James B.
Trumble, Kevin P.
Chandrasekar, Srinivasan
M'Saoubi, Rachid
Source :
CIRP Annals - Manufacturing Technology; 2022, Vol. 71 Issue 1, p93-96, 4p
Publication Year :
2022

Abstract

A macroscopic ductile-to-brittle transition in chip formation with ductile gummy metals, arising from 3.5 to 100 nm thick organic films on the workpiece surface, is demonstrated. The principal characteristics of the phenomenon, with annealed aluminum, are change in the flow mode from one dominated by large-strain plasticity to one controlled by fracture; and up to 70% reduction in cutting force. This embrittlement has important benefits for machined surface quality – nearly an order of magnitude reduction in roughness, > 50% reduction in residual plastic strain, and smaller hardness change. Implications of the phenomenon for material removal processes and beyond are discussed. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00078506
Volume :
71
Issue :
1
Database :
Supplemental Index
Journal :
CIRP Annals - Manufacturing Technology
Publication Type :
Academic Journal
Accession number :
157909590
Full Text :
https://doi.org/10.1016/j.cirp.2022.04.078