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Q6 Q7 a) Define hardenability. What is the common criterion of hardenability of steels and why? Enumerate the five factors affecting the hardenability of the steel. (5) b) What is the composition, properties and applications of phosphor bronze? (5) a) Explain the difference between resolved shear stress and critical resolved shear stress. Derive the expression for critical resolved shear stress. (5) b) Discuss the Martensite characteristics and morphology of Martensite. (5) Q8 Write short answer on any TWO: a) Phase rule and its importance b) Physical metallurgy of copper alloys. c) Stainless steels d) Diffusion-less transformation (5 x 2)

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