Regarding martensitic phase in steel answer the following: a) how does the mechanism of martensite formation differ from the mechanism of formation of other phases in iron-iron carbide phase diagram? b) what are the characteristic features of martensitic phase in plain carbon steels? c) describe the process (in terms of time and temperature) of forming a martensitic phase in such steels. d) martensitic phase is a metastable phase. explain? e) what is one major concern with the formation of martensitic phase in plain carbon steels? how is this concern addressed?

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.

Ifa component is made of two or more materials with different modulus of elasticity (e), it is called a composite member and we calculate the factor·n". mention the formula for calculating n". also, ifn> 1, explain what will happen to the 1. transformed.gi) ifn 1, what will happen to the material when transformed material when