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Dynamic fracture toughness of heat affected zone of 8Cr–1.5Mo steel from instrumented drop weight tests

The results from the 8Cr–1, 5Mo steel were compared with those for AISI grade 403 martensitic stainless steel. The lack of distinctive multiple load peaks in the load–time traces for the latter is attributed to the absence of a steep toughness gradient, owing to a more or less uniform martensitic microstructure in the HAZ.

8Cr–1; 5Mo steel; dynamic fracture toughness

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