Paper Title:
Characterization of Crack Initiation Behavior in Ceramics under Thermal Shock
  Abstract

A new experimental technique, Disc-on-Rod test, was developed for evaluating the thermal shock fracture characteristics of ceramic materials. The specimen is disc shaped with a diameter of 20 mm and a thickness of 0.6 mm, and the 2-dimensional thermal stress field was obtained. The specimen was heated to a high temperature and the center region was quenched by means of contact with a cool metal rod with a diameter of 4 mm. The temperature distribution of the specimen was measured by a high speed IR camera and used for the determination of the thermal stress field in the specimen using FEM calculations. In order to evaluate the fracture process, AE signals during thermal shock fracture were detected. It was observed that the maincrack was initiated at the center region, which was subjected to the maximum balanced biaxial stress. The critical stress for maincrack formation was evaluated and compared with that under mechanical loading, considering the volume effect of strength based on Weibull statistics.

  Info
Periodical
Edited by
Hong-Yuan Liu, Xiaozhi Hu and Mark Hoffman
Pages
281-286
DOI
10.4028/www.scientific.net/KEM.312.281
Citation
S. Wakayama, "Characterization of Crack Initiation Behavior in Ceramics under Thermal Shock", Key Engineering Materials, Vol. 312, pp. 281-286, 2006
Online since
June 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Yasumi Ito, Akira Shimamoto
1246
Authors: Yasumi Ito, Akira Shimamoto
Abstract:Fatigue crack propagation tests of magnesium alloy were conducted under conditions of biaxial and uniaxial loading by using a cruciform...
859
Authors: Wei Hong Li, Li Jiu Wang, Chun An Tang, Yi Wang Bao, Xiong Chen, Shuang Xu
Abstract:The aim of this study is to demonstrate the influence of the stress parallel to the crack plane on subcritical crack growth in brittle...
1071
Authors: Hyun Woo Lee, Se-Jong Oh
Abstract:Crack growth behavior of S45C notched tubular specimen was studied to predict fatigue crack initiation and crack propagation under biaxial...
139