Fatigue occurs when a metal is subjected to repeating, cyclic loads (like a bending wire or a rotating axle). Even if the load is far below the material's yield strength, microscopic cracks form over time, propagate silently, and eventually trigger a sudden, catastrophic snap.
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The concepts outlined in this guide mirror the foundational knowledge found in leading educational resources on physical metallurgy. Fatigue occurs when a metal is subjected to
The metal gives plenty of warning. It stretches, twists, and deforms significantly before finally snapping. microscopic cracks form over time