AN INVESTIGATION OF THE CRACK-PROPAGATION RESISTANCE OF HIGH-STRENGTH ALLOYS AND HEAT-RESISTANT ALLOYS
Abstract
IN THE PROGRAM OUTLINED, THE CRACK-PROPAGATION CHARACTERISTICS OF A NUMBER OF HEAT-RESISTANTALLOYS AND HIGH-STRENGTH ALLOYS WILL BE DETERMINED AT ROOM TEMPERATURE AND AT ELEVATED TEMPERATURES USING FATIGUE-CRACKED SPECIMENS. A listing of these alloys, which fall into three general groups, is given. These groups are: refractory metals, super alloys, and some special high-purity steels. Details of the experimental procedures to be used for these alloys are presented. An evaluation of the standard tensile properties and crack-propagation properties of aged A 286 alloy sheet, 0.040 in. thick, was made. It was found that the net fracture stress of fatigue-cracked specimens f this alloy is intermediate between the yield strength and ultimate strength at temperatures from 75 F to about 1000 F. At 1500 F, the net fracture stress of the fatigue-cracked specimens was somewhat higher than the ultimate tensile strength. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 17, 1961
- Accession Number
- AD0260547
Entities
People
- J.d. Morrison
- P.c. Jenkins
Organizations
- Southern Research