Research of Cu-15Ni-10Mn Alloy As-Cast

A new Cu-15 Ni-10 Mn alloy was researched and analyzed by optical microscope and metallographic measuring software in three geometry directions of ingots. The distribution of elements of alloy was scanned by EDS of EDΛX. The change rule and cause in various geometric directions in microstructure were analyzed. The results show that the structure of ingot of Cu-15 Ni-10 Mn alloy is in a typical crystal segregation state, the main branches (i.e. first dendrites) size of crystal gradually enhances from the edge to the center of ingots. The average space of secondary arms (branches) becomes larger along the casting direction of ingots. The content of Ni and Mn elements is higher, but the content of Cu is lower in the braches than space of branches