The effect of grain boundary misorientation on intergranular cracking of Ni-16Cr-9Fe in 360{degrees}C argon and high purity water

Conference · Thu Dec 31 04:00:00 EST 1992

OSTI ID:48083

Crawford, D C; Was, G S ^[1]

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1. Univ. of Michigan, Ann Arbor, MI (United States)

The effect of grain boundary misorientation on the intergranular cracking behavior of pure Ni-16Cr-9Fe was assessed by determining if low angle boundaries (LABs) of coincident boundaries (CSLBs) are more crack resistant than general high angle boundaries (GHABs) in 360{degrees}C CERTs in argon and in high purity water. Annealed samples contained 12-20% CSLBs while CSLB-enhanced samples contained 27-44% CSLBs. Cracked boundary fractions for CSLB-enhanced samples were lower than those for annealed samples. No LABs cracked in either environment. Smaller proportions of CSLBs cracked than GHABs, thus CSLBs are more crack resistant than GHABs. The results indicate that control of grain boundary proportions can improve the intergranular stress corrosion cracking susceptibility of pure Ni-16Cr-9Fe.

• DOE Contract Number: FG02-85ER45184
• OSTI ID: 48083
• Report Number(s): CONF-910808--
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
36 MATERIALS SCIENCE
CRACK PROPAGATION
GRAIN BOUNDARIES
INCONEL 600
INTERGRANULAR CORROSION
PWR TYPE REACTORS
STEAM GENERATORS
STRESS CORROSION
TUBES