MICROSTRUCTURE AND PROPERTIES OF SiC_w/6061Al COMPOSITE

Acta Metall Sin

1990, Vol. 26

Issue (6): 122-126 DOI:

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MICROSTRUCTURE AND PROPERTIES OF SiC_w/6061Al COMPOSITE

MA Zongyi;YAO Zhongkai Harbin Institute of Technology

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MA Zongyi;YAO Zhongkai Harbin Institute of Technology. MICROSTRUCTURE AND PROPERTIES OF SiC_w/6061Al COMPOSITE. Acta Metall Sin, 1990, 26(6): 122-126.

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Abstract The SiC_w/6061Al composite prepared by squeeze casting has a combi-nation of superior room temperature specific strength and modulus together with ex-cellent thermal properties. The extrusion can make an improvement on the strengthand ductility of the composite from 582 MPa as squeeze casted up to 639 MPa, andon the transformation from isotropic to the anisotropic structure. This seems to beexplained by the orientation of whiskers and the densification of dislocations inmatrix. TEM observation indicates that the stacking fault is the usual planar defecton the SiC_w surface.

Key words: composite SiC whisker Al alloy microstructure

Received: 18 June 1990

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1990/V26/I6/122

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