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Fracture Characteristics of Metal-Intermetallic Laminates Produced by SHS Reactions

Published online by Cambridge University Press:  15 February 2011

D. E. Alman  and
J. C. Rawers
D. E. Alman
Affiliation:
U.S. Bureau of Mines, Albany Research Center, Albany, Oregon 97321
J. C. Rawers
Affiliation:
U.S. Bureau of Mines, Albany Research Center, Albany, Oregon 97321
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Abstract

The tensile behavior of metal-intermetallic layered composites produced by reacting dissimilar elemental foils was studied by U.S. Bureau of Mines researchers. The layered composites were produced by initiating an SHS reaction between Ni and Al foils or Ti and Al foils. The reaction consumed the aluminum foil, resulting in well bonded metal (Ni or Ti) metalaluminide layered composites. Tensile tests revealed that the tensile behavior of the composites was dependent upon the thickness of the intermetallic layer (which in the present case corresponds directly to volume fraction). Composites, in which the intermetallic layers had cracked extensively, behaved in a ductile or tough manner. Not surprisingly, these composites consisted of a relatively thick metal layer compared to the intermetallic layer. It was found that the cracking of the intermetallic layers occurred prior to the deformation of the metal layer. Those composites that had relatively thick intermetallic layers, compared to the metal layer, behaved in a brittle manner. These composites had few cracks in the intermetallic region.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 350: Symposium U – Intermetallic Matrix Composites III , 1994 , 53
Copyright
Copyright © Materials Research Society 1994

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References

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