Microstructures of as cast alloy 1 (a) and alloy 2 (b) and alloy 2 after heating to 750°C without (c) and with (d) 20 min holding time. Samples were etched with 4% HNO3 solution in methanol.
Microstructures of as cast alloy 1 (a) and alloy 2 (b)and alloy 2 after heating to 750°C without (c) andwith (d) 20 min holding time. Samples were etchedwith 4% HNO3 solution in methanol.