Phase transformations and microstructural control in Fe-C alloy system (11 marks) 2. For the Fe-C alloy...
1. Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition, specify the nature of the final microstructure (in terms of microconstituents present and approximate percentages of each) of a small specimen that has been subjected to the following time-temperature treatments. In each case assume that the specimen begins at 760°C and that it has been held at this temperature long enough to have achieved a complete and homogeneous austenitic structure (a) Rapidly cool to 400°C, hold for...
Using the isothermal transformation diagram for an alloy steel (type 4340) specify the nature of the final microstructure (in terms of micro-constituents present and approximate percentages) of a small specimen that has been subjected to the following time-temperature treatments: In each case assume that the specimen begins at 760°C and that it has been held at this temperature long enough to have achieved a complete and homogeneous austenite structure. (a) (a) Rapidly cool to 400°C, hold for 10 seconds, and...
HW Module 10 Due: March 31, 2019 11:59PM 1- Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition (Following Figure), specify the nature of the final microstructure (in terms of micro constituents present and approximate percentages of each) of a small specimen that has been subjected to the following time-temperature treatments. In each case assume that the specimen begins at 760°C (1400°F) and that it has been held at this temperature long enough to have achieved a...
Detailed Subject: Materials Science and Engineering Please make a full explanation and plot in the isothermal diagrams using the graph above. Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition (Figure 10.22), specify the nature of the final microstructure (in terms of microconstituents present and approximate percentages of each) of a small specimen that has been subjected to the following time-temperature treatments. In each case assume that the specimen begins at 760°C (1400°F) and that it has...
600 4. Chapter 10: Example Problem 10.3 (30 points, 10 points each) Using the isothermal transformation diagram for an iron-carbon -Eutected mere 1400 alloy of eutectoid composition (Figure 10.23), specify the nature roo- of the final microstructure in terms of microconstituents present and approximate percentages) of a small specimen that has been subjected to the following time-temperature treatments. In each case, assume that the specimen begins at 760°C (1400°F) and that it has been held at this temperature long enough...
QUESTION 4 (10 points) a. Using the isothermal transformation diagram for iron carbon alloy of eutectoid composition. Specify and sketch the resulting microstructure from the following heat treatments: (Assume that, in each case, the specimen begins at 760 C and that it attains a homogeneous austenite structure) (N.B. ATTACH THE T-T-T DIAGRAM SHEET WITH THE ANSWER SHEET) 11) Cool rapidly to 370 C, hold for 100 s, and then quench to room temperature. [2] Cool rapidly to 250 C, hold...
the isothermal transformation diagram carbon alloy of eutectoid composition specify the nature of the final mi- 11.1 for an e 11.23), r11.23), specifty the nature of the final mi- 11.1 (Figure ture (in terms of microconstituents pres- and approximate percentages of each) of a small specimen that has been subjected to the fol- lowing time-temperature treatments. In each case assume that the specimen begins at 760°C (1400℉) and that it has been held,at this tempera- ture long enough to have...
Round to the nearest 5%--no need for something like 43.2...that would become 45. If there's none of that phase formed, enter a 0 (zero). If it looks close enough then it is 800 1400 Eutectoid temperature 700 1200 1000 500 800 400 600 300 M(start) 200 400 M + A M( 5096) M19096) 100 10 102 03 104105 Time (s) Using the above TTT diagram for the eutectoid composition of steel, enter the relative amount of each microstructure formed for...
Problem 4 The TTT (isothermal transformation) diagram for an iron-carbon alloy with eutectoid 0.78 wt. % C composition is shown on the next page. Describe the microstructure present in a thin strip of 1080 steel (0.80 wt. % C, approximately eutectoid composition) after each step of the following treatments. Assume that the steel is initially 100 % in the austenite phase due to prior homoge- nization by holding at 871 °C for 1 h. (a) Quench in lead at 704...
Austenite Pearlite Question 3 (24 pts): We are interested in performing different heat treatments to an iron-carbon alloy of eutectoid compostion. Use the provided Temperature-Time Transformation (TTT) and Continuous Cooling Transformation (CCT) diagrams to specify the nature of the final microstructure in terms of microconstituents present and approximate percentages) of a small specimen that has been subjected to the following heat treatments. In each case, assume that the specimen begins at 760°C and that it has been at this temperature...