A 30 wt% Cu- 70 wt% Ni alloy is slowly cooled from 1450 C to 1300 C. T(C) 1600 L (liquid) 1500 1400 liquidus Solidus Cu-Ni phas e diagr am 1300 + Ol a (FCC solid solution) 1200 1100 1 1 1000 0 20 40 60 80 100 wt% Ni What is the composition of the last remaining liquid phase (approximately)? 30 wt% Cu - 70 wt%6 Ni 20 wt% Cu - 80 wt% Ni O 45 wt% Cu - 55 wt% Ni 16 wt% Cu - 84 wt% Ni None Hit Calculator E Exam Guid