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 A _fl ) is slightly less than that of those fibres which make a small angle with the normal of the cut surface (denoted as A _fs ). However, on the fracture surface of the composite, A _fl is much bigger than A _fs , and the lower the tensile strength of the specimen, the bigger is A _fl 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

DOI: http://dx.doi.org/10.1179/026708300773002708

Affiliations: The Department of Metal Materials, Sichuan University, 610065 Chengdu, Sichuan, China

Publication date: 2000-01-01

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