Accession Number : AD0722034

Title :   An Electron Microprobe Analysis of Solute Segregation Near Grain Boundaries in an Al-Zn-Mg Alloy.

Descriptive Note : Technical rept.,

Corporate Author : RENSSELAER POLYTECHNIC INST TROY N Y MATERIALS DIV

Personal Author(s) : Shastry,C. R. ; Judd,G.

Report Date : 15 APR 1971

Pagination or Media Count : 24

Abstract : The concentration of zinc and magnesium across grain boundaries was measured by means of an electron probe microanalyser for an Al-Zn-Mg alloy after different quenching (brine, water, oil and air) and aging heat treatments (room temperature, 165C and 200C). Significant solute segregation was detected in quenched specimens and also in specimens that were aged at room temperature. While no segregation was measured in specimens that were aged at elevated temperatures, solute depletion was observed in a considerable proportion of the examined boundaries. It was concluded that solute segregation to grain boundaries occurred during quenching and was relieved during aging. (Author)

Descriptors :   (*ALUMINUM ALLOYS, GRAIN BOUNDARIES), STRESS CORROSION, ZINC ALLOYS, MAGNESIUM ALLOYS, GRAIN STRUCTURES(METALLURGY)

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE