Strength and fatigue of some binary and ternary silicate glasses

Gehrke, E.; Hähnert, M.; Ullner, Christian

doi:10.1016/0022-3093(86)90406-0

Cited by 10 publications

(5 citation statements)

References 11 publications

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“…Only crack length data corresponding to dwell times Ͻ10 5 s have been considered for such numerical analysis. The obtained results are in good agreement with previous data 12,25,[45][46][47][48][49] on borosilicate glasses. The glasses considered in the present work show a value of n decreasing with soda content (Fig.…”

Section: (4) Fatigue Parameters From Indentation Testssupporting

confidence: 92%

“…8), in a similar way to sodium borosilicate glasses in a previous paper. 49 Dynamic fatigue testing on indented samples of commercial glass was also performed to verify the fatigue parameters by an alternative method. Three indentations were produced on samples in the central region using a load of 39.2 N. Care was taken to align the indenter diagonals with sample edges.…”

Section: (4) Fatigue Parameters From Indentation Testsmentioning

confidence: 99%

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Influence of Composition on Fatigue Behavior and Threshold Stress Intensity Factor of Borosilicate Glasses

Bertoldi

2002

Journal of the American Ceramic Society

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Fatigue behavior of borosilicate glasses was studied using the analysis of subcritical propagation of Vickers indentation cracks. Glasses containing various amounts of glass‐network modifiers, mainly soda, were considered. Cone and median/radial crack systems were observed, depending on glass composition, indenter geometry, and test environment. Indentation tests were performed in water, holding the maximum load for durations ranging from 15 s to 6 d. The analysis of the crack length as a function of dwell time allowed evaluation of the subcritical growth parameters and fatigue limit at crack arrest. The influence of composition on fatigue parameters and fatigue limit was discussed in terms of fourfold‐coordinated boron atoms fraction compared with the content of glass‐network modifier ions.

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Section: (4) Fatigue Parameters From Indentation Testssupporting

confidence: 92%

Section: (4) Fatigue Parameters From Indentation Testsmentioning

confidence: 99%

Influence of Composition on Fatigue Behavior and Threshold Stress Intensity Factor of Borosilicate Glasses

Bertoldi

2002

Journal of the American Ceramic Society

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“…This means that the crack also propagates at the smallest stress intensity factors. The region 0', also observed by Simmons and Freiman [5] can be related unambiguously to the crack growth, due to stress-dependent network dissolution including experimentally proved crack-tip blunting [16]. The crack-growth velocity extrapolated to K --0 corresponds to the dissolution rate, V0o, measured on glass rods (Table II).…”

Section: Effect Of the Kind Of Alkali Ionsmentioning

confidence: 88%

“…In every case the crack arrest is much more obvious in glasses with 12, 17 and 24 mol % NazO than in glasses with higher sodium content (36 tool%) in which the crack-tip blunting, due to network dissolution, can be observed directly [16,17]. Because the dissolution rate, Voo, of those glasses increases with increasing sodium content (Table II) the crack-tip blunting cannot be considered to be the dominant mechanism for crack arrest.…”

Section: Effect Of the Kind Of Alkali Ionsmentioning

confidence: 89%

Fatigue limit and crack arrest in alkali-containing silicate glasses

Gehrke¹,

Ullner²,

Hähnert³

1991

J Mater Sci

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Crack growth, including fatigue limit and crack arrest, have been investigated for glasses of the systems xNa20-11AI203-(89-x)SiO 2, xNa20-(100-x)Si02 and xNa20-7CaO-(93-x)Si02 in water as well as in acid and alkaline solutions. From studies of the dependence of the crack arrest on the alkali content of the glass, the kind of alkali (K § Na § Li § the pH of the corrosive medium, the ageing time and ageing loading in conjunction with measuring the alkali leaching behaviour, the basic mechanism of crack arrest and fatigue limit can be concluded. Owing to load-and medium-dependent diffusion processes, a crackgrowth retarding leached layer at the crack is generated with modified strength and crack growth properties compared to the bulk properties. In high alkali-containing glasses the process is additionally stimulated by stresses produced in the leached layer at the crack tip and at the crack surfaces.

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“…Chemical durability of glasses is mainly determined by glass composition and environmental factors such as temperature and humidity. Hydration may cause deterioration of silicate glasses and enhance the growth of surface cracks reducing the overall strength of glass [1]. Thus the strength of glass is governed by the near surface defects, which presumably interact with the hydrated layer.…”

Section: Introductionmentioning

confidence: 98%