Microstructure-Property Correlation in AI_4C_3 Dispersion Strengthened Al Composite

Abstract

Abstract: The microstructure and tensile properties of Al_4C_3 dispersion strengthened Al composite fabricated by reaction milling technique were investigated.It is indicated that the rod-like Al_4C_3 dispersoids having a diameter of 0.02-0.03 μm and a length of 0.1-0.3μm are formed by reaction of C with Al, and uniformly distributed in the Al matrix.The interface between Al_4C_3 and Al is clean and the interfacial bonding is good.The matrix consists of the subgrains which have the size of 0.3-0.4μm, and most of the Al_4C_3 dispersoids are distributed on the subgrain boundaries.The 11 vol.-% Al_4C_3/Al composite exhibits an UTS (ultimate tensile strength) of 400 MPa and an elongation-to-failure of 8.0%.

Key words: Al composite, Al_4C_3 dispersion strengthening, reaction milling, microstructure, tensile properties

Jing BI Zongyi MA Shengjin WU Yuxiong LU Hongwei SHEN Institute of Metal Research,Academia Sinica,Shenyang,110015,China. Microstructure-Property Correlation in AI_4C_3 Dispersion Strengthened Al Composite[J]. J Mater Sci Technol, 1993, 9(1): 61-64.

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Microstructure-Property Correlation in AI_4C_3 Dispersion Strengthened Al Composite

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