brittie. nk the following iron-carbon alloys and as- 11.32 ated microstructures from the most ductile to...
Which of the following correctly ranks some potential microstructures of iron-carbon alloys by their expected hardness, from lowest to highest? Make sure to log into Canvas before midnight tonight to complete the Extra Credit Question! Question 26 1 pts Which of the following correctly ranks some potential microstructures of iron-carbon alloys by their expected hardness, from lowest to highest? pearlite, bainite, spheroidite, martensite spheroidite, pearlite, bainite, martensite spheroidite, pearlite, martensite, bainite martensite, bainite, pearlite, spheroidite bainite, martensite, pearlite, spheroidite
7. Rank the six microstructures of steel in general order of least ductile to most ductile. (bainite, coarse pearlite, fine pearlite, martensite, spheroidite, tempered martensite) 3 pts) Least ductile: Most ductile:
For an Fe-C binary system, list the carbon concentrations required to achieve the following microstructures/microconstituents: (a) pearlite (b) a mixture of pearlite & proeutectoid ferrite (c) bainite (d) spheroidite (e) a mixture of pearlite and proeutectoid cementite
Make a copy of the isothermal transformation diagram for an iron–carbon alloy of eutectoid composition provided overleaf and then sketch and label time–temperature paths on this diagram to produce the following microstructures: a) 25% martensite and 75% austenite b) 100% fine pearlite c) 25% pearlite, 25% bainite, 45% martensite, and 5% austenite. d) 100% tempered martensite. 800 A 1400 Eutectoid temperature 700 A 1200 A P 600 1000 500 800 AXTIS 400 A 600 300 M(start 50% 200 400 M+A...
8) Which of the following statements is ? a) Steel with high carbon content is usually highly ductile b) Primary ferrite is harder than pearlite c) Fine pearlite has higher strength than coarse pearlite d) Steel with 0.3 wt% carbon quenched from 1000 C to room temperature commis 37.2% Martensite and 62.8% Ferrite. e) None of the above 9. Refer to the Po- Sn phase diagram. In a crucible 200 g of an alloy containing 80 g of Sa and...
please answer only highlighted part detailely thank you. By using the Iron-Carbon (Fe-C) phase diagram provided herein, answer the following questions: (a) Sketch the microstructure of alloys A, B, and C in the following temperature ranges when they are cooled from 1000 °C very slowly (equilibrium cooling). Sketch and identify all phases in the microstructures. Comment on the mechanical properties of the resultant alloy as well its constituent phases. For alloy A: T-1000 °C, TA (slightly below), T=728 °C and...
Ou. 3 Chapters 10- 11: Phase Transformations/ Designations, Compositions and Typ Applications for Some Selected Steels (25%) Using the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition 6), please, identify and name the final microstructures resulting from the two cooling curves labeled (@) and (b). (c): Draw and label on Figure 6 the cooling curve that yields the following microstructures: 50% of microstructure A (Figure 7a) and 50% of microstructure B (Figure 7b). (d) Please, provide missing information...
2. An FCC iron-carbon alloy initially containing 0.40 wt% C is exposed to an oxygen-rich and virtually carbon-free atmosphere at 1325 K (1052°C). Under these circumstances the carbon diffuses from the alloy and reacts at the surface with the oxygen in the atmosphere—that is, the carbon concentration at the surface position is maintained essentially at 0 wt% C. (This process of carbon depletion is termed decarburization.) At what position will the carbon concentration be 0.25 wt% after a 10-h treatment?...
15. From the iron-carbon phase diagram (see Figure below) a. What are the concentrations of carbon in each a-ferrite and Fe3C at a temperature just below 727°C? b. What are the phases involved in the eutectoid reaction? c. I am making a hyper-eutectoid steel with 2 wt%C. If I cool slowly from 1400°C, what phases and microstructure will I have at room temperature, assuming only equilibrium phases can be present? d. What is the euctectoid composition for Fe-C system shown...
please answer question 2,3,4 A critical feature of steel is that a considerable amount of carbon can be dissolved in the austenite, phase, (up to 2.14 w/o at 1147"C), whereas carbon is essentially insoluble in ferrite, Cooling from point d to e, just above the eutectoid but still in the an increased fraction of the +y region, will produce phase and a microstructure similar to that shown: the particles precinitates out in the form af an intermetallic.compound called iron-carbide...