In-situ TEM Observation of Brittle Microcrack Nucleation

Rice and Thomson assumed that no dislocation emission takes place from thecrack tip during brittle crack propagation. Experimental observations for Si andFe-Si have shown that dislocations are emitted during cleavage crack propagation.Argon suggested that the transformation from brittle fracture to...

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Bibliographic Details
Published in中国科学通报：英文版 no. 12; pp. 980 - 982
Main Author 张跃 王燕斌 褚武扬 肖纪美
Format Journal Article
LanguageEnglish
Published 01.06.1994
Subjects
aluminide
dislocation-free
nano-microcrack
titanium
zone
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ISSN1001-6538
1861-9541

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Summary:Rice and Thomson assumed that no dislocation emission takes place from thecrack tip during brittle crack propagation. Experimental observations for Si andFe-Si have shown that dislocations are emitted during cleavage crack propagation.Argon suggested that the transformation from brittle fracture to ductile fracture insilicon is controlled by the number of dislocations emitted from the crack tip ratherthan by dislocation nucleation from the tip. However, Chiao assumed that brittle
Bibliography:11-1785/N
ZHANG Yue WANG Yan-Bin CHU Wu-Yang XIAO Ji-Mei(Department of Materials Physics, University of Science and Technology Beijing, Beijing 100083, PRC)
ISSN:1001-6538
1861-9541