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Grain-boundary structure and precipitation in sensitized austenitic stainless steel

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Abstract

Grain-boundary carbide precipitation and intergranular corrosion in sensitized austenite stainless steel were examined by transmission electron microscopy to clarify the effect of grain-boundary structure on precipitation and corrosion. The propensity to intergranular precipitation depends strongly on the grain-boundary structure. Carbide precipitates tend to be detected at grain boundaries with higher Σ values or larger deviation angles (Δθ) from low-Σ coincidence site lattice misorientations. The more ordered boundary requires a longer time for intergranular carbide precipitation and corrosion than less ordered or random boundaries.

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For more information, contact Hiroyuki Kokawa, Aoba-yama 02, Sendai 980-8579, Japan; telephone 81-(22)-217-7351; fax 81-(22)-217-7351; e-mail kokawa@material.tohoku.ac.jp.

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Kokawa, H., Shimada, M. & Sato, Y.S. Grain-boundary structure and precipitation in sensitized austenitic stainless steel. JOM 52, 34–37 (2000). https://doi.org/10.1007/s11837-000-0159-0

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