METALLURGICAL CHARACTERISTICS OF HIGH STRENGTH STRUCTURAL MATERIALS
Abstract
The report includes fracture toughness studies on high strength steels, titanium alloys, and aluminum alloys. Fracture Toughness Index Diagrams, modified to include the latest information, are presented for these materials; the effects of melting practice and processing variables are reflected in the Fracture Toughness Index Diagram for steels by the addition of a new optimum materials trend line for consumable-electrode-vacuum melting of steels. Results are presented for studies concerning (1) the use of side-grooved plane-strain fracture mechanics specimens for valid determinations of fracture toughness, (2) heat-treatment effects on fracture toughness of several titanium alloys, (3) the effect of vacuum heat treatment on stress-corrosion-cracking sensitivity of titanium, and (4) the screening of a variety of titanium alloy plates for sensitivity to stress-corrosion-cracking. The effects of mean strain on low-cycle fatigue crack propagation in 5Ni-Cr-Mo-V steel and 7079-T6 aluminum are presented. Also described in a newly-developed low-cycle fatigue crack propagation test employing fracture mechanics parameters. Results are given for D6AC steels studied in this new test.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1965
- Accession Number
- AD0634094
Entities
People
- C. N. Freed
- D. G. Howe
- E. A. Lange
- K. B. Lloyd
- P. P. Puzak
- R. E. Morey
- R. W. Huber
- R. W. Judy Jr.
- Robert J. Goode
- Thomas W. Crooker
Organizations
- United States Naval Research Laboratory