Journal ArticleDOI
Densification and flow phenomena of glass in indentation experiments
TLDR
In this paper, the theory of plasticity was applied to micrographs and it was shown that glass densification may occur during indentations and simultaneously densification beneath the indentation is a more general property of glasses.Abstract:
Flow of glass may occur during indentations. Remarkable accordance with conclusions from the theory of plasticity was found on micrographs. Simultaneously densification beneath the indentation must be noticed to be a more general property of glasses, whereas flow at room temperature seems to require a minimum percentage of network modifiers.read more
Citations
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Journal ArticleDOI
Elastic stress fields caused by indenting brittle materials
TL;DR: In this article, a linear elasticity theory is used to describe the stresses around indentations in hard, brittle materials, and unorthodox plasticity theory was introduced, and related to two simple elastic fields.
Journal ArticleDOI
Indentation deformation/fracture of normal and anomalous glasses
TL;DR: In this article, Vickers deformation/fracture indentations have been investigated in six silicate glasses and the characteristic damage patterns fall into two distinct groups according to whether the glass shows normal or anomalous mechanical behaviour.
Journal ArticleDOI
Performance and analysis of recording microhardness tests
TL;DR: In this article, the authors derived a new hardness number which is independent of the load also in the microhardness region, which is derived by recording the load during a programmed penetration of the pyramide.
Journal ArticleDOI
Topological principles of borosilicate glass chemistry.
Morten Mattrup Smedskjær,John C. Mauro,Randall E. Youngman,Carrie L. Hogue,Marcel Potuzak,Yuanzheng Yue +5 more
TL;DR: This paper presents a two-state statistical mechanical model of boron speciation in which addition of network modifiers leads to a competition between the formation of nonbridging oxygen and the conversion ofboron from trigonal to tetrahedral configuration, and derives a detailed topological representation of alkali-alkaline earth-borosilicate glasses that enables the accurate prediction of properties such as glass transition temperature, liquid fragility, and hardness.
Journal ArticleDOI
Quantitative evaluation of indentation-induced densification in glass
TL;DR: In this article, three-dimensional images of Vickers indentations on several glasses, including silicate glasses and bulk metallic glass (BMG), were obtained before and after annealing using an atomic force microscope.
References
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Book
Theory of elasticity
TL;DR: The theory of the slipline field is used in this article to solve the problem of stable and non-stressed problems in plane strains in a plane-strain scenario.
Journal ArticleDOI
High-pressure Effects on Oxide Glasses: III, Densification in Nonrigid State
TL;DR: In this article, the annealing behavior of glasses densified in the nonrigid condition is shown to be drastically different from that of the rigidly densified materials, in terms of two different processes of volume flow.
Journal ArticleDOI
Role of Densification in Deformation of Glasses Under Point Loading
TL;DR: In this paper, it was shown that the microplastic effects produced by pressure of hard, sharp points on glasses do not occur by plastic flow, but by densification, and that the technology of glass cutting is dependent on residual stresses associated with densification.
Related Papers (5)
Direct Observation and Analysis of Indentation Cracking in Glasses and Ceramics
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