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← TechnologyWhich risk increases when grinding turbine blades post-casting?
A)Metastable austenite phase transformation occurs✓
B)Increased compressive residual stress buildup
C)Abrasive grit size becomes inconsistent
D)Electrochemical potential shifts to anodic
💡 Explanation
Heat generation during grinding induces a martensitic transformation because the temperature rises rapidly above the austenite finish temperature, therefore creating a hard, brittle, untempered martensite surface layer, rather than desired ductile metallic characteristics.
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