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Match the basic strengthening mechanisms in the following materials Group-I Group-II...

This question belongs to Metallurgical Engineering Physical Metallurgy
Physical Metallurgy
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Match the basic strengthening mechanisms in the following materials.
Group-I Group-II
P. 60 : 40 brass is stronger than 70 : 30 brass. 1. Case hardening
Q. An automobile gear made from 0.6% C steel and quenched in water from a temperature of 850°C. 2. Strain hardening
R. Tungsten filament drawn at a temperature of 400°C. 3. Martensitic strengthening
S. A ball bearing heated in furnace in ammonia atmosphere. 4. Second phase strengthening

Answer & Solution
Correct Answer: Option A
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