Accession Number : ADA186444

Title :   Durability and Damage Tolerance of Aluminum Castings.

Descriptive Note : Interim rept. no 1, Sep 85-31 May 87,

Corporate Author : NORTHROP CORP HAWTHORNE CA AIRCRAFT DIV

Personal Author(s) : Ozelton, M W ; Turk, G R

PDF Url : ADA186444

Report Date : Sep 1987

Pagination or Media Count : 108

Abstract : The results from the initial 21 months of the program are presented. They include (a) an assessment of Nondestructive methods for castings, and (b) the effect of process variables on the mechanical properties and microstructure of A357-Tb and A201-T7. A new ultrasonic NDI method called Frequency Attenuation Inflection (FAI) was evaluated for determining the type and amount defects in A357 and A201 aluminum castings. A low frequency eddy current method for detecting the presence of cracks through face sheet and fasteners was assessed. Relationship among chemical composition, heat treatment, solidification rate, microstructure, and mechanical properties of the premium quality casting alloys A357-T6 and A201-T7 were investigated. Keywords: Aluminum castings, Mechanical properties, Specifications, Regression analyses, Composition, Heat treatment, Solidification rate, Microstructure.

Descriptors :   *ALUMINUM, *CASTINGS, CRACKS, HEAT TREATMENT, MICROSTRUCTURE, REGRESSION ANALYSIS, NONDESTRUCTIVE TESTING, CHEMICAL COMPOSITION, DAMAGE, TOLERANCE, MECHANICAL PROPERTIES, ULTRASONICS, SOLIDIFICATION, ALLOYS, AIRFRAMES, NOTCH SENSITIVITY, RADIOGRAPHY, X RAY SPECTROSCOPY, TENSILE PROPERTIES, STRENGTH WEIGHT RATIO, COSTS

Subject Categories : Properties of Metals and Alloys
      Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE