Question 3 Phase diagrams (4 marks) Using the following phase diagram of the Magnesium (Mg) -Lead...
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Question 3 Phase diagrams (4 marks) Using the following phase diagram of the Magnesium (Mg) -Lead (Pb) in the Figure 3 Composition (at % Pb) a) c) i. iii. d) iv. Temperature (°C) V. vi. 700 600 500 400 300 200 100 0 0 0 (Mg) a 20 a + L 2 40 1 10 L a+Mg₂Pb b) What is the name of the curves 1 and 2 indentified on Figure 3 60 Composition (wt% Pb) 20 Mg₂Pb Figure 3. Phase Diagram of Mg-Pb L + Mg₂Pb M What are the composition of those phases? What is the percentage amount of each phase? 30 40 T T For a lead (Pb)-magnesium (Mg) composition ( 15% Mg) alloy at 400°C What phases are present? What are the composition of those phases? What is the percentage amount of each phase? For a lead (pb)-magnesium (Mg) composition (90% Mg) alloy at 300°C What phases are present? 80 L + Mg₂Pb 70 100. B + L 1 B 1200 1000 800 600 400 Pure Mg is fired at 700°C. List the phase transitions that occur (and the temperatures that they occur at) as it is cooled to less than 20°C. B+ Mg₂Pb 200 100 (Pb) Temperature (°F) Question 3 Phase diagrams (4 marks) Using the following phase diagram of the Magnesium (Mg) -Lead (Pb) in the Figure 3 Composition (at % Pb) a) c) i. iii. d) iv. Temperature (°C) V. vi. 700 600 500 400 300 200 100 0 0 0 (Mg) a 20 a + L 2 40 1 10 L a+Mg₂Pb b) What is the name of the curves 1 and 2 indentified on Figure 3 60 Composition (wt% Pb) 20 Mg₂Pb Figure 3. Phase Diagram of Mg-Pb L + Mg₂Pb M What are the composition of those phases? What is the percentage amount of each phase? 30 40 T T For a lead (Pb)-magnesium (Mg) composition ( 15% Mg) alloy at 400°C What phases are present? What are the composition of those phases? What is the percentage amount of each phase? For a lead (pb)-magnesium (Mg) composition (90% Mg) alloy at 300°C What phases are present? 80 L + Mg₂Pb 70 100. B + L 1 B 1200 1000 800 600 400 Pure Mg is fired at 700°C. List the phase transitions that occur (and the temperatures that they occur at) as it is cooled to less than 20°C. B+ Mg₂Pb 200 100 (Pb) Temperature (°F)
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Essentials of Materials Science and Engineering
ISBN: 978-1111576851
3rd edition
Authors: Donald R. Askeland, Wendelin J. Wright
Posted Date:
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