Effect of Alloying on the Microstructure and Fracture Toughness of Nb-Mo-Si Alloys
来源期刊：稀有金属材料与工程2009年增刊第3期
论文作者：Li Huanxi Wei Qiang Ma Chaoli Zheng Lijing Li Yang
关键词：niobium-silicon-molybdenum; microstructure; fracture toughness; casting;
摘 要：It was found that typical Nb_(ss) /Nb_5Si_3 eutectic lamellar structure formed in the Nb-Mo-Si alloy. The interface between Nb_(ss) and Nb_5Si_3 phases was so strong that the alloy fractured mainly in the cleavage mode. In this paper, the fourth element was added with the aim of modifying interface structure. The microstructural characterization and the fracture toughness of Nb-17Si-10Mo ternary alloy doped with Ga, In, Zn and V, respectively, were investigated. It was revealed that the lamellar structure maintained with the addition of Ga and In, whereas it changed slightly with Zn and V additions. Moreover, a little increase in fracture toughness of Nb-17Si-10Mo ternary alloy was obtained through the addition of Ga and Zn.
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摘要:It was found that typical Nb_(ss) /Nb_5Si_3 eutectic lamellar structure formed in the Nb-Mo-Si alloy. The interface between Nb_(ss) and Nb_5Si_3 phases was so strong that the alloy fractured mainly in the cleavage mode. In this paper, the fourth element was added with the aim of modifying interface structure. The microstructural characterization and the fracture toughness of Nb-17Si-10Mo ternary alloy doped with Ga, In, Zn and V, respectively, were investigated. It was revealed that the lamellar structure maintained with the addition of Ga and In, whereas it changed slightly with Zn and V additions. Moreover, a little increase in fracture toughness of Nb-17Si-10Mo ternary alloy was obtained through the addition of Ga and Zn.
关键词:niobium-silicon-molybdenum; microstructure; fracture toughness; casting;
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