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ELASTIC PROPERTIES OF METAL SUPERLATTICES

Published online by Cambridge University Press:  28 February 2011

A.F. JANKOWSKI  and
T. TSAKALAKOS
A.F. JANKOWSKI
Affiliation:
Rockwell International, Rocky Flats Plant, P.O. Box 464, Golden, Colorado 80401
T. TSAKALAKOS
Affiliation:
Dept. of Mechanics and Materials Science, College of Engineering, Rutgers University, P.O. Box 909, Piscataway, NJ 08854
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Abstract

The elastic properties of modulated structure materials are presented. An enhanced modulus effect has been observed in several composition modulated thin film systems containing short wavelength modulations.8-10nm. The foils were produced by vapor deposition using two or three source evaporator. As compared with homogeneous foils of the same average composition, the modulated foils exhibited an appreciable increase (up to 300%) in modulus. The dependence of various moduli on the modulation parameters (wavelength, composition and amplitude) are described. The plastic behavior, breaking and microhardness of these foils are also presented as a function of the modulation parameters. Current theories based on electronic and strain effects on the elastic constants of metals are also presented to explain the origin of the supermodulus effect.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 56: Symposium H – Layered Structures and Epitaxy , 1985 , 407
Copyright
Copyright © Materials Research Society 1986

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