Accession Number : ADA181421

Title :   The Use of Novel Processing Procedures for Improving Overall Fatigue Resistance of High Strength Aluminum Alloys.

Descriptive Note : Final rept. 1 Jan 84-31 Dec 86,

Corporate Author : VIRGINIA UNIV CHARLOTTESVILLE DEPT OF MATERIALS SCIENCE

Personal Author(s) : Starke,Edgar A , Jr ; Wert,J A

PDF Url : ADA181421

Report Date : May 1987

Pagination or Media Count : 72

Abstract : In Part 1 of this investigation, ductile fracture of 2134 aluminum alloys stabilized by Zirconium has been studied as a function of Mn rich particle content in the under and overaged conditions. As expected in the highest Mn containing alloy voids/sq mm, void growth rate, and void volume fraction were the highest whereas in alloys with 0% and 0.31% Mn these parameters were somewhat similar and lower. Part 2 of this investigation has examined interangular fracture during heat treatment and deformation of an Al-Li-Cu alloy and an Al-Li-Cu-Mg alloy. When the Al-Li-Cu-Mg alloy used in this study is solution treated by rapid heating to 550 C, nonequilibrium eutectic melting of a soluble phase occurs.

Descriptors :   *FATIGUE(MECHANICS), *RESISTANCE, *FATIGUE LIFE, *ALUMINUM ALLOYS, *PROCESSING, ALLOYS, VOIDS, DEFORMATION, HEAT TREATMENT, EUTECTICS, MELTING, NONEQUILIBRIUM FLOW, HIGH RATE, ZIRCONIUM, DUCTILITY, FRACTURE(MECHANICS), GROWTH(GENERAL), RATES, HIGH STRENGTH ALLOYS, SOLUBILITY, MANGANESE ALLOYS, LITHIUM ALLOYS, COPPER ALLOYS, MAGNESIUM ALLOYS, NUCLEATION, GRAIN BOUNDARIES, MICROSTRUCTURE, CHEMICAL COMPOSITION, AGING(MATERIALS)

Subject Categories : Fabrication Metallurgy
      Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE