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Dispersion-Strengthened Aluminium Alloys

Author: E.A. Bloch    |   Document Download   |   Product code: ZIMR0622P193

File size: 37 MB

Classified as: Aluminum Brazing ...more

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When, some fifteen years ago, Irmann made his discovery of the Sintered Aluminium Products of high elevated-temperature strength, subsequently known as S.A.P, its importance was by no means confined to the potentialities of the new material alone; metallurgists became generally conscious of the possibility of strengthening metals with the aid of a finely dispersed, hard, and thermally stable phase. Numerous theoretical and experimental investigations conducted over the past ten years have resulted in a self-consistent theory of dispersionstrengthened materials. This theory has been largely developed at the American Universities and Technical Institutes by such workers as Grant, Lenel, and Goetzel and their associates, and has been summarized in various publications. A short survey of the whole field has recently been published by Palme, while a major contribution by Goetzel deals particularly with the potentialities of the light metals. A paper on the latest developments in the S.A.P. field was recently presented by Bloch and Hug, while Towner has given a summary report on the APM alloys of ALCOA.t Dispersion-strengthened materials can be produced only by powdermetallurgical methods. Of the various techniques now available for the purpose, the mechanical mixing of the finely powdered aluminium with a non-metallic substance has never assumed any importance for the actual dispersion-strengthening of aluminium. This latter method is applied only to obtain, by means of suitable additions, specific properties such as high neutron absorption or a low coefficient of thermal expansion.
  • From: International Materials Reviews, Volume 06, Number 22, 1961 (ASM-IOM-Maney)
  • Published: 1961
  • Pages: 47