For a lead-tin alloy of composition 80 wt Sn–20 wt Pb and at 180∘C(335∘F), do the following: a) Determine the mass fractions the α and β phases. b) Determine the mass fractions of primary β and eutectic microconstituents. c) Determine the mass fraction of eutectic β

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For a lead-tin alloy of composition 80 wt Sn–20 wt Pb and at 180∘C(335∘F), do the following:  a) Determine the mass fractions the α and β phases.  b) Determine the mass fractions of primary β and eutectic microconstituents.  c) Determine the mass fraction of eutectic β

inenge3y · Accepted Answer

a) &amp;nbsp;CβP=18.3,Ce=61.9, and&amp;nbsp;CβT=97.8&amp;nbsp;The mass fraction isWα=C1−C0C1−C2=97.8−8097.8−18.3=0.22&amp;nbsp;Wβ=1−Wα=1−0.22=0.78&amp;nbsp;b)&amp;nbsp;WβP=80−61.997.8−61.9=0.5&amp;nbsp;WeP=1−Wβ=1−0.5=0.5&amp;nbsp;c) The mass fraction of the eutectic comes from:&amp;nbsp;Wβe=Wβ−WβP=0.78−0.5=0.28&amp;nbsp;&amp;nbsp;&amp;nbsp;a) 0.22 and 0.78&amp;nbsp;b) 0.5 and 0.5&amp;nbsp;c) 0.28

For a lead-tin alloy of composition 80 wt Sn–20 wt Pb and at 180^\circ C(335^

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