Accession Number : ADA329634

Title :   Corrosion and Fatigue of Aluminum Alloys: Chemistry, Micro-Mechanics and Reliability.

Descriptive Note : Final technical rept. 1 July 93-31 Mar 97,

Corporate Author : LEHIGH UNIV BETHLEHEM PA DEPT OF MECHANICAL ENGINEERING AND MECHANICS

Personal Author(s) : Wei, Robert P.

PDF Url : ADA329634

Report Date : 12 MAY 1997

Pagination or Media Count : 35

Abstract : Lehigh University undertook a multidisciplinary program of research to develop a basic mechanistic understanding of localized corrosion and corrosion fatigue crack nucleation and growth in aluminum alloys used in aircraft construction, and to begin to formulate mechanistically based probability models for reliability assessments based on this understanding. The objectives of the program are: (1) the development of basic understanding of the processes of localized corrosion and corrosion fatigue crack nucleation and growth in high strength aluminum alloys used in airframe construction, (2) the formulation of kinetic models for these elemental processes, and (3) the integration of these models into probabilistic models that can provide guidance in formulating methodologies for service life prediction. The effort included a study of the feasibility for incorporating the mechanistically based probability models into appropriate fatigue analysis codes (such as MODGRO). This final technical report summarizes research completed under this grant and reflects contributions from the companion program sponsored by the Aging Airplanes Program of the Federal Aviation Administration (FAA) under Grant No. 92-G-0006.

Descriptors :   *AIRCRAFT INDUSTRY, *CORROSION, *ALUMINUM ALLOYS, *CONSTRUCTION, *FATIGUE(MECHANICS), TEST AND EVALUATION, MATHEMATICAL MODELS, AIRCRAFT, AGING(MATERIALS), LIFE EXPECTANCY(SERVICE LIFE), PREDICTIONS, CRACKS, FORMULATIONS, PROBABILITY, HIGH STRENGTH ALLOYS, NUCLEATION, CODING, CHEMISTRY, RELIABILITY, FEASIBILITY STUDIES, AIRFRAMES, KINETICS.

Subject Categories : Aircraft
      Metallurgy and Metallography
      Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE