The assignment must be submitted at the beginning of the lecture on the due date. The Assignment page(s) must form the cover page of your submission. 1. Define fatigue strength. Fatigue strength...
The assignment must be submitted at the beginning of the lecture on the due date. The Assignment page(s) must form the cover page of your submission. 1. Define fatigue strength. Fatigue strength is generally one-fourth to one-half of the tensile strength. Determine the ball park value of fatigue 1 strength in the form Y + AY using the given figure for a metal that has tensile strength of 800 MPa. Here Y- Fatigue strength. Mark 'solidus', and liquidus' on the Cu-Ni phase maps. What are the melting points of Cu and Ni respectively? Calculate the degrees of freedom for a 50:50 Cu-Ni alloy at () 1400°C, where it exists as a single, liquid phase. (ii) 1300°C, where it exists as a two-phase mixture (I) 1200°C, where it exists as a single, solid-00 solution phase. Assume a constant atmospheric pressure of I atm on the alloys in each case 2. 1020 30 40 50 60 90 1400 1,100 08487H Cu 10 20 30 40 S0 60 7080 90Ni Weight percentage, nickel Draw a sketch of Cu-Ni phase map of #2 above and describe qualitatively the microstructural development that will occur upon slow cooling of a melt of equal parts (by weigh)of Cu and Ni. You can illustrate your answer by making sketches as in Fig, 9.12. 3. tin
The assignment must be submitted at the beginning of the lecture on the due date. The Assignment page(s) must form the cover page of your submission. 1. Define fatigue strength. Fatigue strength is generally one-fourth to one-half of the tensile strength. Determine the ball park value of fatigue 1 strength in the form Y + AY using the given figure for a metal that has tensile strength of 800 MPa. Here Y- Fatigue strength. Mark 'solidus', and liquidus' on the Cu-Ni phase maps. What are the melting points of Cu and Ni respectively? Calculate the degrees of freedom for a 50:50 Cu-Ni alloy at () 1400°C, where it exists as a single, liquid phase. (ii) 1300°C, where it exists as a two-phase mixture (I) 1200°C, where it exists as a single, solid-00 solution phase. Assume a constant atmospheric pressure of I atm on the alloys in each case 2. 1020 30 40 50 60 90 1400 1,100 08487H Cu 10 20 30 40 S0 60 7080 90Ni Weight percentage, nickel Draw a sketch of Cu-Ni phase map of #2 above and describe qualitatively the microstructural development that will occur upon slow cooling of a melt of equal parts (by weigh)of Cu and Ni. You can illustrate your answer by making sketches as in Fig, 9.12. 3. tin