| Popis: |
Piping systems in breeder reactor plants will require transition joint weldments between austenitic and ferritic materials. Specifically, annealed 2 1/4 Cr-1Mo steel will be welded with ERNiCr-3 using the hot wire automatic gas tungstenarc process. These weldments may see elevated temperature service for periods of up to 30 years, and, accordingly, prototypic weldments will require extensive mechanical property characterization. It was the objective of this effort to define the strain controlled low cycle fatigue behavior of as-deposited and stress-relieved ERNiCr-3 weld metal and to develop test methods for establishing the cyclic behavior of heat-affected-zone (HAZ) material. Low cycle fatigue and cyclic stress-strain response for ERNiCr-3 were established over the temperature range of 295 to 866 K. A number of low cycle fatigue test results are reported for hourglass-shaped specimens that demonstrated that the low cycle fatigue behavior of HAZ material adjacent to the fusion line could be characterized. |
