Accession Number:

AD0641262

Title:

METALLURGICAL CHARACTERISTICS OF HIGH STRENGTH STRUCTURAL MATERIALS.

Descriptive Note:

Quarterly rept. no. 10,

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s):

Report Date:

1966-04-01

Pagination or Media Count:

112.0

Abstract:

A progress report covering the research studies in high strength structural metals conducted in the period December 1965 through March 1966 is presented. The report includes fracture toughness studies on expected normal production 12-Ni maraging and 9Ni-4Co-0.25C steels, a variety of circular rolled and conventionally rolled titanium alloys, and aluminum alloys using a standard engineering developed, and linear elastic fracture mechanics type fracture toughness tests. Preliminary correlations of KIc with drop weight tear test energy for a variety of titanium alloys are presented. Low cycle fatigue crack propagation in 12-Ni maraging steels in air and salt water is described and compared to the behavior of other steels. Also, crack initiation versus propagation failure criteria for low cycle fatigue in air and in aqueous environments is presented for HY-80 and 5Ni-Cr-Mo-V steels and 12-Ni maraging steels. The stress-corrosion-cracking resistance of a variety of titanium alloys and several aluminum alloys has been determined using a cantilever-bend test comparison of results obtained in the laboratory and in natural seawater at Key West are presented for a Ti-7Al-2Cb-1Ta alloy. Author

Descriptors:

Subject Categories:

  • Properties of Metals and Alloys
  • Fabrication Metallurgy
  • Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE


View the full text of this report