Accession Number : AD0736812

Title :   Development of Improved High-Strength Steels for Aircraft Structural Components.

Descriptive Note : Final technical rept. 1 May 69-30 Aug 71,

Corporate Author : UNITED STATES STEEL CORP MONROEVILLE PA APPLIED RESEARCH LAB

Personal Author(s) : Mravic,B. ; Smith,J. H.

Report Date : OCT 1971

Pagination or Media Count : 144

Abstract : The report summarizes the results of a program to develop high-strength steels with improved reliability for use in aircraft structures. The most promising steels had very fine prior-austenite grain sizes (about ASTM No. 15) produced by multiple-cycle rapid austenitizing. The results of studies to develop a conventionally heat-treated 10Ni-Cr-Mo-Co steel, studies of other types of ultra-fine-grained steels, and studies of the effects of purity on toughness and ductility are also reported. (Author)

Descriptors :   (*STEEL, *AIRFRAMES), HEAT TREATMENT, MECHANICAL PROPERTIES, GRAIN SIZE, NICKEL ALLOYS, MOLYBDENUM ALLOYS, COBALT ALLOYS

Subject Categories : Aircraft
      Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE