Weibull statistical analysis of tensile strength data of short mullite fibre reinforced aluminium alloy composite
Authors: Zhao, P.; Gao, S.J.; Shen, B.L.; Tu, M.J.
Source: Materials Science and Technology, Volume 16, Number 1, January 2000 , pp. 95-98(4)
Publisher: Maney Publishing
Abstract:A statistical evaluation by means of Weibull statistics was carried out on the tensile strength data of a short mullite fibre reinforced aluminium alloy composite, which was prepared by squeeze casting. The results show that the material has a high and reliable tensile strength. The area fractions of the fibres on the cut surface and on the fracture surface of specimens have been statistically analysed. The fibre distribution shows heterogeneity in the microsturcture. On the cut surface the average area fraction of fibres which make large angles with the normal of the cut surface (denoted as Afl ) is slightly less than that of those fibres which make a small angle with the normal of the cut surface (denoted as Afs ). However, on the fracture surface of the composite, Afl is much bigger than Afs , and the lower the tensile strength of the specimen, the bigger is Afl on the fracture surface. Debonding of the interface between the large angle fibres and the matrix is an important cause of failure of the composite, and the non-uniform distribution of the large angle fibres is one of the main causes of the large scatter in the data.
Document Type: Regular Paper
Affiliations: The Department of Metal Materials, Sichuan University, 610065 Chengdu, Sichuan, China
Publication date: 2000-01-01
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