Describe the cooling of a peritectic alloy with the concentration CO and sketch the microstructure during solidificatio...
Describe the difference of microstructure of solids in Ni Cu alloy with equilibrium cooling and fast cooling for solidification. If super cooling, describe the kinetics of diffusional phase transformations at low, medium, and high supercooling conditions.
What is the fraction of primary β in the X2 alloy that forms under equilibrium cooling at eutectic temperature? What fractions of primary α and eutectic micro-constituent composition are formed in the X1 alloy below the eutectic isotherm? What amounts of α and β form from liquid just below the eutectic temperature in the X2 alloy? What are the amounts of total α and the eutectic α in the X1 alloy at a temperature just below the eutectic temperature? Consider...
1. Below is the phase diagram of Pb-Sn alloy. (a) Describe what happens to a 20%-Pb 80%-Sn alloy as temperature decreases from 300 °C to 50 °C; use sketches as needed. (b) When temperature is kept constant at 200 °C, describe what happens as the Sn concentration is increased from 10 wt% to 90 wt%; use sketches as needed. 100% Liquid Procutectic α 24% Eutectic α Liquid 76% Eutectic β Alloy I Alloy 2 Liquid 49% 327 Liquidus 300 Liquid...
• It is a eutectic system. • The melting point of pure aluminum is 6600C • The melting point of silicon is 1410 0C • The eutectic temperature is 5800C • Aluminum is insoluble in silicon • The eutectic composition is 85% Al + 15% Si • The Al-rich phase (α) is a solid solution of Si in Al and the maximum solubility of Si in α is 3% at the eutectic temperature • At 500°C the solubility of Si in α has fallen to 0% and...
explain answers Temperature (C 800 [a] What microstructure would be developed by rapidly cooling to 600°C and holding for 50ts0A 5 seconds, followed by rapid cooling to 400'C s and holding for 50 seconds, followed by quenching to room temperature? o ftvg5m600 S07. tortie Euectoid temperature 700 A Z$7.Boinile L5-maikns: 500 400- What microstructure would be developed by rapidly cooling to 400 C and holding for 500 seconds, followed by quenching to room temperature, then heating to 700 C for...
Q2-B Using figure Q 2-A (the above), sketch neatly the microstructure of the alloys (indicate the amount of each phase presented) given in table Q 2-B (assumed it is cooling at equilibrium) [80 Marks] Answer of O 2-B Table Q2-B Structure of the alloys Compositions Temperature Structure Compositions Temperature Structure 32.5% Cu 10% Cu Room Room temperature temperature I 2% Cu 550 C 40% Cu Room temperature Q2-A Figure Q2-A shows the equilibrium phase diagram of aluminium and copper metals...
Sketch and describe a typical steel microstructure with a C content of less than 0.8%C.
When do cored structures (grains) form during cooling of an alloy – Equilibrium or non-equilibrium cooling? Why? ..........(4 points) a)Note: Explain what component (higher or lower melting point) forms the core (center) and the boundary (outer edges) of the cored structure (grain)?
Quiz 22 I. For a 95% Al-5% Cu alloy (vertical line): a. (4 pts) Sketch and label what you expect the microstructure to look like if the alloy is slow (equilibrium) cooled from 550°C to room temperature 800 700 660. 52 600 T (°C) 548 2 b. (4 pts) Sketch and label what you expect the microstructure of an overaged precipitation hardened alloy to look like. 5.65 500 - 400 c. (2 points) Why aren't Aluminum-Copper alloys containing 10 wt%...
Cast iron just like steel has wide applications. It is an alloy with carbon content in excess of about 2%C (usually between 2.5 and 4.3%C) and Si content in excess of 0.5%. The microstructure of cast iron after solidification influences the final properties of the casting From the iron carbon phase diagram above answer the following questions: a) Calculate the volume fraction of ledeburite (eutectic component) present in the alloy containing 3%C after solidification under: i) equilibrium conditions ii) fully...