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If a high-stress condition promotes crack propagation within bonded silicon wafers, which mechanism governs the material failure outcome?

A)Intergranular fracture propagates along grain boundaries
B)Transgranular fracture cuts through matrix
C)Elastic deformation allows full crack-closure
D)Ductile fracture blunts through grain shear

💡 Explanation

The mechanism that governs material failure under stress is Intergranular fracture propagation at grain boundaries. Because stress concentration exists along the silicon grain boundaries with differing crystal lattice orientations, therefore, cracks propagate between grains, rather than transgranular fracture through grains.

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