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← TechnologyWhich issue arises when using closed-die forging near net shape on a titanium alloy component with insufficient die lubrication?
A)Increased coefficient of thermal expansion
B)Localized adiabatic shear banding✓
C)Elevated rate of grain refinement
D)Decreased hydrogen embrittlement susceptibility
💡 Explanation
Insufficient lubrication during titanium forging can cause localized adiabatic shear banding because the immense plastic deformation generates localized heat, exceeding the material's thermal limits. Therefore, shear bands form, rather than uniform deformation, because heat cannot dissipate quickly enough.
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