Indentation cracking in soda-lime glass and Ni-Zn ferrite under Knoop and conical indenters and residual stress measurements
| Autor: | Srinivasan Chandrasekar, M. M. Chaudhri |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Soda-lime glass
Materials science Physics and Astronomy (miscellaneous) Metallurgy Metals and Alloys Toughened glass Conical surface Condensed Matter Physics Electronic Optical and Magnetic Materials chemistry.chemical_compound Cracking chemistry Residual stress Tungsten carbide Indentation Knoop hardness test General Materials Science |
| Zdroj: | Philosophical Magazine A. 67:1187-1218 |
| ISSN: | 1460-6992 0141-8610 |
| DOI: | 10.1080/01418619308224767 |
| Popis: | The indentation cracking behaviour of thermally tempered and of annealed soda-lime glass blocks has been studied experimentally. The indenters were a Knoop pyramidal diamond and a tungsten carbide cone of apex angle 90d'. They were loaded normally on to the flats and particular attention was paid to the evolution (i.e. initiation and growth) of the median and lateral cracks generated under the indenters. Under the Knoop indenter, a half-penny-shaped median crack formed in both the tempered and the annealed soda-lime blocks during loading to sufficiently high loads. During unloading, the median crack grew in length at the indented surface while its depth appeared to decrease (not heal). Lateral cracks, both the subsurface and the shallow types, formed during unloading. The shallow surface laterals always formed at close to complete unloading and caused chipping of the surface. The surface extent of the lateral cracking extended beyond the surface traces of the median cracks in the thermally tempered glass ... |
| Databáze: | OpenAIRE |
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