Coaxing is a procedure aimed at increasing__________________?
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Answer: D. fatigue limit by overstressing the metal by successively increasing loadings
Explanation
Coaxing is a metallurgical process aimed at increasing the fatigue limit of a metal. It involves initially subjecting the material to low stress cycles below its normal threshold. Gradually increasing the loading over time successfully strengthens the metal against fatigue failure. Fatigue limit is the maximum stress level a material can endure for infinite cyclic loadings. Microscopic grain restructuring occurs when metals undergo controlled progressive loading cycles. Metallurgists use various surface and thermal treatments to enhance component fatigue resistance.
Components subjected to cyclic loads, like aircraft wings and crankshafts, benefit from fatigue treatments. Understanding coaxing helps engineers design durable metallic structures for harsh service environments. Preventing fatigue crack propagation is essential for avoiding catastrophic structural failures. Option A mentions general metal strength, but coaxing specifically targets the fatigue limit. Option B suggests surface hardness treatment, which is typically achieved through carburizing or quenching. Option C refers to corrosion resistance, which is managed through protective chemical coatings.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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