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Metallurgical Engineering Miscellaneous In Metallurgy Difficulty: Medium

Thin walled pressure vessels are to be made either from Material A and B. If the applied stress is 1.2 times higher when material A is used and (K IC ) A = 0.6(K IC ) B (where, K IC denotes plain strain fracture toughness). The ratio of critical crack lengths in material A and B will be

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More Metallurgical Engineering Questions

At the mould exit of a continuous caster, the metal consisting of a solidified shell with a liquid metal core exits at the rate of 35 kg S -1 . Given that the latent heat of fusion is 3 × 10 5 J kg -1 and the total rate of heat removal by the mould is 4.2 × 10 6 W, the mass fraction of solid at the mould exit is . . . . . . . . Assume that both while solid and liquid remain at the melting point, they are in the mould. Which of the following oxide addition results in polymerisation (e.g., network formation) in a silicate slag? Under application of stress, when a straight dislocation (radius of curvature, r = ∞) tries to bow out around precipitates of spacing L, there is an instability during changing of curvature at Activators are those chemicals which help buoying up one mineral in preference to the other in the troth floatation process. Which of the following is an activator? Match the heat treatment process in Group I with resultant microstructure Group II . Group I Group II P. Martempering 1. Coarse pearlite Q. Normalising 2. Fine pearlite R. Sub-critical annealing for long time 3. Tempered martensite S. Full annealing 4. Spheroidised cementite in the matrix of ferrite