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Title: Analysis and prediction of thermal shock in brittle materials

Abstract

The indentation quench method has been studied through both experiments and modeling. Practical results are obtained for alumina, whisker reinforced alumina, cermet and high speed steel. The crack growth vs temperature difference curves show no crack growth at very low {Delta}Ts, stable crack growth at medium {Delta}Ts and unstable crack growth above a certain {Delta}T ({Delta}T{sub U}) and these regimes are explained in the analysis. The stable and unstable crack growth are governed by the combination of residual and thermal stress. An expression has been derived for the prediction of thermal shock resistance and it is shown that the fracture toughness is of great importance. The presence of residual stress results in the greater sensitivity of the indentation-quench method compared to other approaches, and also makes it possible to define specific values of {Delta}T adapted to specific applications. The method can be used to explore susceptibility to thermal fracture in a range of brittle materials on condition that it is possible to insert an indentation precrack.

Authors:
;
Publication Date:
Research Org.:
Royal Inst. of Tech., Stockholm (SE)
OSTI Identifier:
20075924
Resource Type:
Journal Article
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 48; Journal Issue: 8; Other Information: PBD: 11 May 2000; Journal ID: ISSN 1359-6454
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; THERMAL SHOCK; ALUMINIUM OXIDES; COMPOSITE MATERIALS; CERMETS; STEELS; CRACK PROPAGATION; STRESSES; PREDICTION EQUATIONS

Citation Formats

Collin, M., and Rowcliffe, D. Analysis and prediction of thermal shock in brittle materials. United States: N. p., 2000. Web. doi:10.1016/S1359-6454(00)00011-2.
Collin, M., & Rowcliffe, D. Analysis and prediction of thermal shock in brittle materials. United States. doi:10.1016/S1359-6454(00)00011-2.
Collin, M., and Rowcliffe, D. Thu . "Analysis and prediction of thermal shock in brittle materials". United States. doi:10.1016/S1359-6454(00)00011-2.
@article{osti_20075924,
title = {Analysis and prediction of thermal shock in brittle materials},
author = {Collin, M. and Rowcliffe, D.},
abstractNote = {The indentation quench method has been studied through both experiments and modeling. Practical results are obtained for alumina, whisker reinforced alumina, cermet and high speed steel. The crack growth vs temperature difference curves show no crack growth at very low {Delta}Ts, stable crack growth at medium {Delta}Ts and unstable crack growth above a certain {Delta}T ({Delta}T{sub U}) and these regimes are explained in the analysis. The stable and unstable crack growth are governed by the combination of residual and thermal stress. An expression has been derived for the prediction of thermal shock resistance and it is shown that the fracture toughness is of great importance. The presence of residual stress results in the greater sensitivity of the indentation-quench method compared to other approaches, and also makes it possible to define specific values of {Delta}T adapted to specific applications. The method can be used to explore susceptibility to thermal fracture in a range of brittle materials on condition that it is possible to insert an indentation precrack.},
doi = {10.1016/S1359-6454(00)00011-2},
journal = {Acta Materialia},
issn = {1359-6454},
number = 8,
volume = 48,
place = {United States},
year = {2000},
month = {5}
}