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Titolo:
SCRATCH TEST OF SODA-LIME GLASS
Autore:
LI K; SHAPIRO Y; LI JCM;
Indirizzi:
UNIV ROCHESTER,DEPT MECH ENGN,MAT SCI PROGRAM ROCHESTER NY 14627 UNIV ROCHESTER,DEPT MECH ENGN,MAT SCI PROGRAM ROCHESTER NY 14627 UNIV ROCHESTER,CTR OPT MFG ROCHESTER NY 14627
Titolo Testata:
Acta materialia
fascicolo: 15, volume: 46, anno: 1998,
pagine: 5569 - 5578
SICI:
1359-6454(1998)46:15<5569:STOSG>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
BRITTLE MATERIALS; CRACK-GROWTH; ADHESION; FILMS; FRACTURE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
30
Recensione:
Indirizzi per estratti:
Citazione:
K. Li et al., "SCRATCH TEST OF SODA-LIME GLASS", Acta materialia, 46(15), 1998, pp. 5569-5578

Abstract

A series of single point scratch tests have been performed on soda-lime glass slides using spherical and conical diamond indenters. The conical indenters had different apex angles, 2 theta. The force ratio (horizontal to normal) is independent of normal load or driving speed, but increases linearly with cot theta, indicating a plowing mechanism inwhich the scratch hardness (normal load divided by one half of the vertically projected contact area) is equal to the plowing stress (horizontal force divided by the horizontally projected contact area). As the driving speed increases, the width of the scratch decreases so both the scratch hardness and the plowing stress increase proportionally while the crack density decreases. For spherical indenters, the frictionappears to be caused by adhesion rather than plowing. In a liquid environment (water) the horizontal force increases and stick-slip appears. The rate of crack formation seems to follow first order kinetics in which the probability of cracking within an interacting distance is proportional to the fraction of the uncracked portion of the scratch. The damage mechanism changes from deformation to cracking with the increase of scratch depth. (C) 1998 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved.

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Documento generato il 15/07/20 alle ore 04:34:51