1600 ao Liquid 1200 austenite 800 Y + cementite 400 ferrite a + cementite 1 2 3 4 5 7 Mass percentage of carbon Fig. 4 A part of the phase diagram typical of a simple steel. Temperature, orc Fe,C cementite
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Image shows a part of the phase diagram typical of a simple steel. Describe what would be observed as the melt at a is allowed to cool to room temperature.
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- Refer to the phase diagram below. A copper-nickel alloy of composition 70 wt% Ni-30 wt% Cu is slowly heated from a temperature of 1300°C. (a) At what temperature does the first liquid phase form? (b) What is the composition of this liquid phase? (c) At what temperature does complete melting of the alloy occur? (d) What is the composition of the last solid remaining prior to complete melting?A copper-nickel alloy of composition 70 wt% Ni - 30 wt% Cu is slowly heated from 1250 °C. What is percentage of copper in the first liquid phase that forms? Use the Cu-Ni equilibrium phase diagram shown below. 1500 Temperature (°C) 1455° 1400 Liquidus L 1300 1280° α + L Solidus 1200 1100 1085° 1240° α 1000 Cu 20 40 60 80 Ni Weight percent nickelSuggest and explain in detail one heat treatment procedure that can strengthen or harden (the medium- carbon steel). Sketch the microstructure of the steel after being hardened. Compare the mechanical behaviour of the hardened steel to the plain carbon steel based on their microstructures.
- A copper-nickel alloy of composition 45 wt% Ni - 55 wt% Cu is slowly heated from 1200 °C. What percentage of Ni is in the first liquid to form? Use the Cu-Ni equilibrium phase diagram shown below. 1500 Temperature (°C) 1455° 1400 Liquidus L 1300 1280° α + L Solidus 1200 1100 1085° 1240° α 1000 Cu 20 40 60 80 Ni Weight percent nickel5. Consider the phase diagram of Cu-Be shown below. At 1000°C with an overall alloy composition of 1 wt% Be, determine the: (a) Phase present, (b) phase compositions, (c) relative amount of each phase, and (d) amount of solid (in grams) that forms in 50 g of the alloy. Include your tie line in the solution. Composition (at% Be) 5 10 15 20 Liquid 1000 7+ 866°C 800 a + Y1 -620°C 600 a + Y2 400 1 4 (Cu) Composition (wt% Be) Temperature (°C)For the alloy Mg-45 wt% Pb alloy at 500 C, what is the weight percentage of Pb in liquid?
- The maximum solid solubility of carbon in ferrite occurs at 0.022 wt% C and 727 ° C, the eutectoid composition is 0.76 wt% C, the maximum solid solubility of carbon in austenite occurs at 2.14 wt% C and 1147 ° C, and the cementite composition is 6.7 wt% C. For 2122 g of a 3.2134 wt% C steel at 726 ° C, what will be the mass of carbon present as part of a compound?(a) 67.9 g(b) 74.2 g(c) 58.7 g(d) 83.5 g4m K R EMetals H X Se.com/u/1/c/MTUAMTYZNTK2OTM3/a/Mig0NjcAMzk0ODA4/delails tals Homework Packet 18.pdf Oper wth UNDERSTANDING ORES Most ores look like ordinary rocks. You would not guess that they contain shiny metal. The earth's crust is made up of many minerals. Minerals can be defined as naturally occuring chemical elements and compounds. People have discovered more than 2,000 different minerals. Many of these contain metals. But because the metal elements are linked with other elements in the minerals, the metals do not show all of their properties. Figure A 1. Most minerals are elements, compounds 2. In order to free the metal from the other elements, a mineral must be synthesized, decomposed Page 3 I 6 Q +Q/ Correct the under line words 1-Ferrous alloys above 6.67%ls has structure of FeC+ Cementite. 2- Ferrous alloys have FCC. structure at temp. Of 25 - 723 C° and temp. 1294 - 1538c° 3. The difference between gas carburizing and pack carburizing is the atmosphere type (liquid or gas) 4. Steel of 2.13 % C can be used for feeds applications 5. The yield strength of high alloy steel can be increased by adding No, Mg. Ti elements 6-Steel of (1.6 1.9) % Mn + (0.3_0.4)% C has higher strength than high carbon steel but more 3.14% Mn steel because ductile 7. Ni and Cr adding give pearlite phase at R.T. and such steel can hardened by annealing 8. at high temp. ferritic steel is used because such steel don't transferred to berlitic structure during cooling to R.T. and remain ferritic Structure 9. mealable cart iron has good machinability because graphite noduler act as chip breakers Flakes 10.pearlite phase when cooling to 723C° give structure of Fe;C +cemintite 11. Sulpher in cast iron ,its…
- If our alloy has a composition of 40% Si and has a temperature of 1100C, determine: What phase(s) are present?The assumptions about the virtual process state diagrams of metals A and B similar to the lead-tin system in Figure 9.8 are as follows. (1)The α phase and β phase exist at both ends of A and B. (2) The process composition is 36 wt% A to 64 wt% B. (3) The composition of β phase at the process temperature is 88 wt% A to 12 wt% B. Find the composition of an alloy in which the weight fraction of invitation β and total β is 0.367 and 0.768, respectively.Describe, with using necessary diagrams, the structure and/or microstructure of the following materials and justify their applications based on their properties. Plain carbon steel (0.25% C), as used to make a body panel for a car Duraluminum 2024: as used to make aircraft structures High density polyethylene (HDPE), as used to make non-carbonated drinks containers Silicon carbide, as used in ball type flow control valves Carbon fibre reinforced polymer (CFRP), as used in the construction of high-end automobile racing