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← ScienceWhich mechanism causes increased brittleness upon quench-hardening steel?
A)Martensite transformation inhibiting dislocation slip✓
B)Grain boundary segregation promoting ductility
C)Austenite formation decreasing yield strength
D)Pearlite formation increasing energy absorption
💡 Explanation
Martensite transformation induces increased brittleness because interstitial carbon obstructs dislocation slip, therefore reducing ductility; rather than increasing ductility like options B and D or decreasing strength like option C, the mechanism hardens steel whilst embrittling it.
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