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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

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More Metallurgical Engineering Questions

A furnace wall consists of two layers. The inside layer of 450 mm is made of light weight bricks of thermal conductivity IW/m.K and outside layer of 900 mm is made of refractory of thermal conductivity 2W/m.K. The hot face of the inside layer is at temperature 1300 K and the cold face of the outer layer is at 400 K. The temperature at the interface between the two layers is . . . . . . . . K. In brazing process, the liquid metal fills the gap by which one of the following means? Which of the following is a property of ceramics? Which of the following are not commercially manufactured by powder metallurgy Match the microstructural state of the following steels with. their respective heat treatments Group-I Group-II P. Eutectoid steel homogenised at 900°C and quenched in water at room temperature 1. Ferrite, martensite and retained austenite Q. A 0.4% C steel soaked at 750°C and quenched in water at room temperature. 2. Pearlite and carbide R. Normalised 1%C steel. 3. Martensite and retained austenite S. Eutectoid steel subjected to normalising 4. Pearlite