2. For a lead-tin alloy of composition 65 wt% Sn - 35 wt% Pb that has been slowly cooled from 300°C down to 180°C, find

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2 For A Lead Tin Alloy Of Composition 65 Wt Sn 35 Wt Pb That Has Been Slowly Cooled From 300 C Down To 180 C Find 1 (56.14 KiB) Viewed 41 times

2. For a lead-tin alloy of composition 65 wt% Sn - 35 wt% Pb that has been slowly cooled from 300°C down to 180°C, find the following: (20) a. What is the first phase that forms and what is it called? b. Determine the mass fractions of a and B phases. c. Determine the mass fractions of proeutectic phase and eutectic phase. d. Determine the mass fraction of eutectic ß. e. Draw the final microstructure and identify all of the phases present. Composition Cat% Sn) 0 20 40 100 60 80 다. 327°C 600 300 Liguld 500 232°C a+2 400 200 183C Temperature (°C) Temperature (°F) 31.9 978 18.3 300 100 +B 200 100 0 40 60 80 100 20 65 to Composition (wt% Sn) (Sn) (Pb) >