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← ScienceWhich consequence results when dislocations occur via slip in crystalline metal?
A)Increased material strain hardening✓
B)Elevated ductile fracture toughness
C)Diminished resistance to creep
D)Amplified thermal expansion coefficient
💡 Explanation
Increased material strain hardening exists because the mechanism termed dislocation pile-up occurs at grain boundaries preventing further slip; therefore continued stress concentration ahead of pileup causes strain hardening rather than creep because applied temperatures must trigger creep mechanisms.
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