Effects of internal helium on tensile properties of austenitic stainless steels and related alloys at 820 °C
Tensile tests of uncharged, protium-charged, and tritium-charged and aged specimens of annealed Incoloy 903 alloy and high-energy-rate-forged (HERF) 316L stainless steel showed that 47-432 appm of internal He-3 caused drastic decreases in ductility at temperatures above about 600 °C. Recent tests have been performed to determine the He-3 concentration thresholds for loss of ductility at 820 °C for these alloys plus HERF lncoloy 903 alloy, 316LN, 304L and Nitronic 40 stainless steels, and Nickel 200 alloy. The decrease in ductility at 820 °C as a function of internal He-3 concentration was found to be greatest for annealed 316LN and Nitronic 40 stainless steels and least for HERF 316L stainless steel. These results suggest that the effect of He-3 on ductility at 820 °C may be influenced more by the metallurgical condition of the material than the composition.
- Research Organization:
- Westinghouse Savannah River Co., Aiken, SC (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC09-89SR18035
- OSTI ID:
- 10159365
- Report Number(s):
- WSRC-MS--93-617; CONF-940945--1; ON: DE94013656
- Country of Publication:
- United States
- Language:
- English
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