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Critique of materials‐based models of ductile machining in brittle solids
Author(s) -
Huang Han,
Lawn Brian R.,
Cook Robert F.,
Marshall David B.
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17344
Subject(s) - indentation , fracture toughness , brittleness , machining , materials science , grinding , fracture (geology) , modulus , toughness , composite material , indentation hardness , nanoindentation , metallurgy , forensic engineering , microstructure , engineering
Indentation fracture models of ductile machining in hard and brittle materials are critically appraised. Relations obtained in a seminal study for critical depths of cut below which fracture is suppressed are examined and amended. Limitations inherent in any such materials‐based analysis, in addition to uncertainties in empirical measurements of underpinning mechanical properties (modulus, hardness, toughness) and of threshold grinding depths, suggest that caution should be exercised in unconditional usage. Notwithstanding these limitations, the value of the indentation fracture methodology in placing ductile machining on a sound materials science footing is maintained.