A 1.5-kg specimen of a 90 wt% Pb???10 wt% Sn alloy is heated to 250oC (480oF); at
Question:
A 1.5-kg specimen of a 90 wt% Pb???10 wt% Sn alloy is heated to 250oC (480oF); at this temperature it is entirely an a-phase solid solution (Figure). The alloy is to be melted to the extent that 50% of the specimen is liquid, the remainder being the a phase. This may be accomplished either by heating the alloy or changing its composition while holding the temperature constant.
(a)?? ? ??To what temperature must the specimen be heated?
(b)?? ? ??How much tin must be added to the 1.5-kg specimen at 250?C to achieve this state?
Transcribed Image Text:
Composition (at% Sn) 20 40 60 80 100 327°C 600 300 Liquid 500 232°C a +L 200 400 8+L 183'C 18.3 61.9 97.8 300 100 a + B 200 100 20 40 60 80 100 (Pb) Composition (wt% Sn) (Sn) Temperature ("C) (3.) enjesedweL
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a Probably the easiest way to solve this part of the problem is by trial and errorthat is on the PbS...View the full answer
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Related Book For
Fundamentals of Materials Science and Engineering An Integrated Approach
ISBN: 978-1118061602
4th Edition
Authors: David G. Rethwisch
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