21. A 10 mm thick En-24 steel yielded a valid plane strain fracture toughness of 80 Mpa √m. The minimum yield strength of the steel is . . . . . . . . MPa.
22. In precipitation hardenable alloy like duralumin, intermediate precipitates can form due to
23. Identify the incorrect statement with respect to grain growth.
24. Coring is often being removed by subsequent
25. During the solidification of a pure metal, it was found that dendrites are formed. Assuming that the liquid-solid interface is at the melting temperature, the temperature from the interface into the liquid
26. Creep resistance decreases due to
27. What is the eutectic composition in Pb-Sn diagram
28. The net effect of continuous cooling on the TTT curves is that the curves are shifted to the
29. Substantial amount of bainite can form during continous cooling in
30. A 0.2% C steel is equilibriated just above the eutectoid temperature and then quenched in iced brine. The room temperature microstructure will consist of
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