Effect of alloying elements on stress corrosion cracking of stainless alloys
- FNACE, Wilmington, DE (United States)
Long-time stress corrosion cracking tests were made in boiling, 45% magnesium chloride (MgCl{sub 2}) solution at 155 C and in an autoclave, 26% sodium chloride (NaCl) solution at 200 C on 15 commercial stainless steel and Ni-based alloys and four laboratory Fe-Cr-Ni heats. The results were compared with the original Copson curve derived from tests in the MgCl{sub 2} solution on wires made from Fe-20% Cr alloys with a range of Ni contents. Additional alloying elements in commercial alloys (Mo, Cu, Ti, Cb) do not have a significant effect on the Copson curve. In contrast, in the less severe NaCl tests, times to failure were greatly increased and the range of Ni concentration in which alloys are susceptible to cracking was narrowed, even in 100-day tests. The significant of this information on the effect of Ni in cases of exceedingly long service times, such as for containers for high-level nuclear waste, is discussed.
- OSTI ID:
- 566717
- Journal Information:
- Materials Performance, Vol. 36, Issue 11; Other Information: PBD: Nov 1997
- Country of Publication:
- United States
- Language:
- English
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05 NUCLEAR FUELS
STAINLESS STEELS
STRESS CORROSION
CRACK PROPAGATION
NICKEL BASE ALLOYS
CHROMIUM STEELS
RADIOACTIVE WASTE STORAGE
METALLURGICAL EFFECTS
MOLYBDENUM
COPPER
TITANIUM
NIOBIUM
HIGH-LEVEL RADIOACTIVE WASTES
CONTAINERS
STAINLESS STEEL-446
STAINLESS STEEL-304
STAINLESS STEEL-310
INCOLOY 800
INCOLOY 825
INCONEL 600
INCONEL 625
HASTELLOYS