Altering Corrosion Response via Grain Boundary Engineering

L. Tan; Kumar Sridharan; T.R. Allen

doi:10.4028/www.scientific.net/MSF.595-598.409

Paper Titles

Alkali Induced Corrosion of 304-Type Austenitic Stainless Steel at 600°C; Comparison between KCl, K₂CO₃ and K₂SO₄
p.367

Corrosion in Biomass Combustion Systems
p.377

Development of Strain in Oxides Grown in Steam Tubes
p.387

Slag-Refractory Interaction in Slagging Coal Gasifiers
p.397

Altering Corrosion Response via Grain Boundary Engineering
p.409

Modelling of Corrosion Induced Stresses during Zircaloy-4 Oxidation in Air
p.419

Thermodynamic Modelling of the Destruction of the Surface Cr₂O₃ on Alloy 230 in the Impure Helium Atmosphere of a Gas Cooled Reactor
p.429

Comparison of the High Temperature Surface Reactivity in Impure Helium of Two Materials for Gas Cooled Reactors
p.439

Kinetic Study of the Low Temperature Internal Oxidation of Nickel Based Model Alloys Exposed to PWR Primary Water
p.449

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Altering Corrosion Response via Grain Boundary Engineering

Abstract:

Grain boundary engineering (GBE) was employed to improve the oxide exfoliation resistance and mitigate oxide growth by optimizing the grain boundary character distribution. Studies were performed on alloys of Incoloy 800H and Inconel 617. Alloys 800H and 617 were selected due to their potential applications for the Generation IV nuclear power systems. The effect of GBE on the corrosion response was evaluated using supercritical water exposure tests and cyclic oxidation tests. The microstructure of the tested samples was analyzed by means of optical microscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy, electron backscatter diffraction, and gravimetry. The effects of thermal expansion mismatch and Cr volatilization on the corrosion response are discussed.