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← TechnologyWhich risk increases when high-speed precision forging introduces asymmetric cooling?
A)Reduced ultimate tensile strength✓
B)Increased resistance to crack propagation
C)Improved surface hardness properties
D)Enhanced ductile fracture resistance
💡 Explanation
Asymmetric cooling during precision forging induces residual stresses because differential thermal contraction mechanically deforms the metal. This leads to reduced ultimate tensile strength rather than improving crack resistance; therefore, annealing after forging mitigates these stresses, rather than leaving them unaddressed.
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