1at%) at different positions of ingots. Oxygen content is decreased to 300 mg/kg by using high quality raw materials and a optimized melting process. There are not phases and microstructures induced by high melting point raw materials in the ingot, and the as-cast microstructures of the ingots are typically nearly lamellar microstructure."/>
[Zhang Zhiyong, Xu Xiangjun, Hao Guojian, Zhang Laiqi, Lin Junpin. Homogeneity of Composition and Structure for High Nb Containing TiAl Alloy Ingots Prepared by Vacuum Levitation Melting[J]. Rare Metal Materials and Engineering,2014,43(12):3063~3067.]
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