Accession Number : AD0747709

Title :   Corrosion Fatigue Crack Propagation in Aluminum Alloys. Part I. Effect of Cyclic Stress Wave Form on Corrosion Fatigue Crack Propagation in Al-Zn-Mg Alloys. Part II. Mechanisms of Corrosion Fatigue Crack Propagation in Al-Zn-Mg Alloys.

Descriptive Note : Final rept. 1 Jul 69-31 Dec 71,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF METALLURGY AND MATERIALS SCIENCE

Personal Author(s) : Selines,Ronald J. ; Stoltz,Ronald E. ; Pelloux,Regis M.

Report Date : FEB 1972

Pagination or Media Count : 78

Abstract : The report is divided into 2 parts. In part one, fatigue crack growth rates of a 7075 type aluminum alloy were measured as a function of environment, frequency, stress wave form, alloy chemistry, and thermomechanical treatment. Results are discussed. Part 2 discusses corrosion fatigue crack propagation tests which were performed on commercial 7075 alloys. Testing was done in a 3.5% sodium chloride solution under constant impressed potential and under reversed anodic-cathodic current conditions.

Descriptors :   (*ALUMINUM ALLOYS, *CORROSION), FATIGUE(MECHANICS), CRACK PROPAGATION, ZINC ALLOYS, MAGNESIUM ALLOYS

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE