AN INVESTIGATION OF THE CRACK-PROPAGATION RESISTANCE OF HIGH-STRENGTH ALLOYS AND HEAT-RESISTANT ALLOYS
Abstract
IN THE EVALUATIONS OF THE Mo sheet materials, emphasis was placed on locating brittle-ductile transition temperatures. Both the Mo + 0.5% Ti and the TZM (Mo + 0.5% Ti + 0.08% Zr) alloys had a transition temperature at 65 F. The transition temperature for unalloyed molybdenum was 150 F. In the investigation of the tensile and crackpropagation properties of the Mo alloys at elevated temperatures, no pronounced effects attributable to strain aging were found for the unalloyed Mo or the Mo--0.5% Ti alloy. However, the 0.2%-offset yield strength showed a slight maximum and the ultimate tensile strength showed a marked maximum at 1000 F for the TZM material. This was also accompained by a corresponding drop in net fracture stress at the same temperature. These effects are believed to be definitely the result of a strain aging phenomenon. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 27, 1961
- Accession Number
- AD0259795
Entities
People
- J.d. Morrison
- P.c. Jenkins
Organizations
- Southern Research