Accession Number : ADA119839

Title :   Materials Screening Tests of the FOD Impact Design Technology Program. Task IV C.

Descriptive Note : Final technical rept. Oct 77-Jun 80,


Personal Author(s) : Bertke,Robert S

PDF Url : ADA119839

Report Date : Feb 1982

Pagination or Media Count : 68

Abstract : This report describes a study to develop screening tests to identify and evaluate candidate fan and compressor blade materials of aircraft engines which may possess superior foreign object damage (FOD) resistance. Tests were developed to determine the ballistic limit, local deformation characteristics, gross structural damage characteristics, and the fatigue strength of candidate blade materials. The data generated demonstrated that the screening tests utilized could rate and rank the candidate materials investigated. The materials investigated included 8A1-1Mo-IV and 6A1-4V titaniums, 410 stainless steel in the annealed and heat-treated conditions, a boron/aluminum composite, and a graphite/epoxy composite. Based on the results, the titanium alloys were superior followed by the stainless steel material. The composites showed very poor response to the screening tests and were ranked last. Equations were developed for each screening tests which can be used to determine the response of new candidate materials to foreign object damage. (Author)

Descriptors :   *Composite materials, *Metals, *Matrix materials, *Plastic deformation, *Fatigue tests(Mechanics), *Fan blades, Jet engines, Ingestion(Engines), Charpy impact tests, Ballistics, Ranking, Stresses, Stainless steel, Boron compounds, Aluminum alloys, Titanium alloys, Microstructure, Damage assessment, Birds, Ice, Sand

Subject Categories : Aircraft
      Laminates and Composite Materials
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE