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Abstract

The ambient- and elevated-temperature tensile behaviour of the directionally solidified fibrous Fe–Fe₂B and lamellar Ni–Ni₃Si eutectics has been studied. The matrix in the fibrous composite displays enhanced strength characteristics owing to a constraint phenomenon caused by the combined effects of the closeness of the fibres and the condition of strain compatibility at the matrix/fibre interface. Expressions are derived to obtain the yield strain of the matrix phase in the composite. In polycrystalline specimens, a grain boundary inclined to the tensile axis, having no fibres crossing it, is found to be an easy shear path at elevated temperatures. This may limit the use of similar eutectic systems to single crystals.

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Tensile-Deformation Characteristics of Unidirectionally Solidified Eutectic Alloys

Abstract

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References