Accession Number : AD0675668

Title :   INCREASING THE TOUGHNESS OF AFC 77 BY CONTROL OF RETAINED AUSTENITE CONTENT, AUSFORMING, AND STRAIN AGING,

Corporate Author : BOEING CO RENTON WASH COMMERCIAL AIRPLANE DIV

Personal Author(s) : Webster,Donald

Report Date : 08 AUG 1968

Pagination or Media Count : 51

Abstract : A high strength martensitic stainless steel, AFC 77, suffers from low fracture toughness in its highest strength conditions produced by tempering in the range 800 degrees F - 1100 degrees F. Three methods of improving toughness without loss of strength have been utilized to overcome this: control of retained austenite content, strain aging, and ausforming. (Author)

Descriptors :   (*STAINLESS STEEL, MECHANICAL PROPERTIES), TOUGHNESS, TEMPERING, HOT WORKING, STRAIN HARDENING, LOW TEMPERATURE, TENSILE PROPERTIES, QUENCHING, HEAT TREATMENT, COMPRESSIVE PROPERTIES, IMPACT TESTS, AUSTENITE, MARTENSITE, STRESS CORROSION, MATHEMATICAL ANALYSIS, BENDING, THICKNESS, YIELD POINT, FRACTOGRAPHY, CRACK PROPAGATION, HEAT TREATMENT

Subject Categories : Properties of Metals and Alloys
      Fabrication Metallurgy
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE