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FIGURE 6.3: Phase diagram for the tin-lead alloy system. Temperature °C 300 α+L 200-4 183°C 100 Liquid 61.9% Sn (362°F) (eutectic composition) α+β 600 500 B B+L400 20 40 60 80 Pb Sn % Tin (Sn) 300 200 100 Temperature °F a) Label the liquidus and solidus lines (2pt) b) define all the pure phases, terminal phases, and intermediate phases in the system (2 pt) c) For a 25% -Sn alloy at 175 C find the phases present (2 pt) d) For a 25% -Sn alloy at 175 C find the phase fraction of alpha and beta phases (weight percent) (4 pts) e) For this same composition, what would be the mass fraction of primary alpha and eutectic microconstituents. (2 pt) f) Determine the mass fraction of eutectic alpha (2 pt) g) for part d, convert the mass fraction to volume fraction (look up density) (4 points) h) for this same composition draw the phases present at 375, 275, 185, 100 C (2 pt) for the 25 wt% Sn

FIGURE 6.3: Phase diagram for the tin-lead alloy system. Temperature °C 300 α+L 200-4 183°C 100 Liquid 61.9% Sn (362°F) (eutectic composition) α+β 600 500 B B+L400 20 40 60 80 Pb Sn % Tin (Sn) 300 200 100 Temperature °F a) Label the liquidus and solidus lines (2pt) b) define all the pure phases, terminal phases, and intermediate phases in the system (2 pt) c) For a 25% -Sn alloy at 175 C find the phases present (2 pt) d) For a 25% -Sn alloy at 175 C find the phase fraction of alpha and beta phases (weight percent) (4 pts) e) For this same composition, what would be the mass fraction of primary alpha and eutectic microconstituents. (2 pt) f) Determine the mass fraction of eutectic alpha (2 pt) g) for part d, convert the mass fraction to volume fraction (look up density) (4 points) h) for this same composition draw the phases present at 375, 275, 185, 100 C (2 pt) for the 25 wt% Sn

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
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FIGURE 6.3: Phase diagram for the tin-lead alloy system. Temperature °C 300 α+L 200-4 183°C 100 Liquid 61.9% Sn (362°F) (eutectic composition) α+β 600 500 B B+L400 20 40 60 80 Pb Sn % Tin (Sn) 300 200 100 Temperature °F a) Label the liquidus and solidus lines (2pt) b) define all the pure phases, terminal phases, and intermediate phases in the system (2 pt) c) For a 25% -Sn alloy at 175 C find the phases present (2 pt) d) For a 25% -Sn alloy at 175 C find the phase fraction of alpha and beta phases (weight percent) (4 pts) e) For this same composition, what would be the mass fraction of primary alpha and eutectic microconstituents. (2 pt) f) Determine the mass fraction of eutectic alpha (2 pt) g) for part d, convert the mass fraction to volume fraction (look up density) (4 points) h) for this same composition draw the phases present at 375, 275, 185, 100 C (2 pt) for the 25 wt% Sn
Transcribed Image Text:FIGURE 6.3: Phase diagram for the tin-lead alloy system. Temperature °C 300 α+L 200-4 183°C 100 Liquid 61.9% Sn (362°F) (eutectic composition) α+β 600 500 B B+L400 20 40 60 80 Pb Sn % Tin (Sn) 300 200 100 Temperature °F a) Label the liquidus and solidus lines (2pt) b) define all the pure phases, terminal phases, and intermediate phases in the system (2 pt) c) For a 25% -Sn alloy at 175 C find the phases present (2 pt) d) For a 25% -Sn alloy at 175 C find the phase fraction of alpha and beta phases (weight percent) (4 pts) e) For this same composition, what would be the mass fraction of primary alpha and eutectic microconstituents. (2 pt) f) Determine the mass fraction of eutectic alpha (2 pt) g) for part d, convert the mass fraction to volume fraction (look up density) (4 points) h) for this same composition draw the phases present at 375, 275, 185, 100 C (2 pt) for the 25 wt% Sn
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