THE EFFECT OF MECHANICAL HEAT TREATMENT ON THE CYCLIC STRENGTH OF HEAT-RESISTANT ALLOYS,
Abstract
The effect of mechanico-thermal treatment (MTT) on the fatigue strength of EI867 and EI437B nickel alloys has been investigated and the optimal conditions of MTT for these alloys have been determined. Specimens of EI867 nickel alloy were annealed at 1220 degrees C for 5 hr, air cooled, and aged at 950 degrees C for 8 hr. Specimens of EI437B nickel alloy were annealed at 1080 degrees C for 8 hr, air cooled and aged at 700 degrees C for 16 hr. The heat-treated specimens were slowly stretched (0.04 mm/min) at 500-900 degrees C up to 0.2-4 percent elongation. After stretching the specimens were held at 500-900 degrees C for 24 hr. So prepared specimens were fatigue tested at 700-900 degrees C under fluctuating loads at 2900 cycles/min. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 12, 1969
- Accession Number
- AD0694179
Entities
People
- A. A. Gorbakon
- T. A. Lebedev
- T. K. Marinets
Organizations
- National Air and Space Intelligence Center