重大基础研究前期研究专项项目（2005CCA06400）；国家“973”项目（2007CB613807）
A novel flame-retarded Ti14 alloy (α+Ti2Cu) was solid forged at 950 ℃ and semi-solid forged (SSF) at 1000 ℃, respectively. Compared with that of the solid forged alloy, the microstructure and tensile properties of the semi-solid forged alloy were investigated; meanwhile, the possible reason for the change of the microstructure and tensile properties were also discussed. The results show that the dynamic recrystallization does not occur during the SSF, which coarsened the grains at room temperature. Liquid Ti2Cu distributed along grain boundaries under pressure, and segregation was formed, coarsening grain boundaries and changing their microstructure; the microstructure change of grain boundaries induced the hardening effect, resulting in the increase of tensile strength and the decrease of plasticity at room temperature.
陈永楠,魏建锋,赵永庆,屈可朋,王 慧. Ti14合金半固态变形组织及力学性能[J].稀有金属材料与工程,2009,38(10):1822~1825.[Chen Yongnan, Wei Jianfeng, Zhao Yongqing, Qu Kepeng, Wang Hui. Microstructure and Mechanical Properties of Ti14 Alloy after Semi-Solid Deformation[J]. Rare Metal Materials and Engineering,2009,38(10):1822~1825.]
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