A comparative study on effects of special casting processes on microstructural development in Cu-10Al-4Fe-4Ni alloy

作者：Lin, Gaoyong^*; Lei, Yuxia; Zeng, Juhua; Li, Han; Xu, Xiuzhi

来源：Journal of Materials Research, 2013, 28(20): 2874-2880.

DOI：10.1557/jmr.2013.290

• NICKEL-ALUMINUM BRONZE
• SHAPE-MEMORY ALLOYS
• MECHANICAL-PROPERTIES
• HEAT-TREATMENT
• NIAL BRONZE
• AL

Suction casting (SC) and centrifugal casting (CC) are two common special casting processes. The influences of SC and CC on the microstructural development of Cu-10Al-4Fe-4Ni aluminum bronzes were investigated with continuous cooling method. The results indicate that alpha, beta', K-II, and K-III phases are observed in the quasicast microstructure via the SC process with the precipitation sequence of K-II -> alpha -> K-III. Additionally, K-I and K-IV are observed in the quasicast microstructure via the CC process with the precipitation sequence of alpha + K-I -> K-II -> K-IV -> K-III. Phase initial precipitation temperatures of the CC process are higher than that of the SC process, especially for alpha phase. As the quenching temperature decreases, the hardness of both alloys shows a rapid decline trend and finally reaches a steady state. It is found that the eutectoid decomposition (beta -> alpha + K-III) barely affects the hardness of the alloys.

• 出版日期2013-10
• 单位中南大学