【摘要】 研究了固溶时效热处理对多向锻造TiBw/Ti复合材料组织和力学性能的影响。实验表明:当固溶温度为950℃时,复合材料的基体为双态组织,TiBw沿初生α相分布;固溶温度为1050℃时,等轴α相转化为片层α相和α集束,β晶界出现,TiBw沿β晶界分布;固溶温度为1150℃时,复合材料的基体组织为魏氏组织,β晶界进一步扩大,α集束更加细长,TiBw沿β晶界或α集束分布。经热处理后,TiBw/Ti复合材料的室温抗拉强度和屈服强度随着固溶温度升高而增加,但室温塑性呈现相反趋势。更多还原

【Abstract】 The effects of solution and aging heat treatments on the microstructure and mechanical properties of multi-direction forged TiBw/Ti composites were studied. The experimental results show that when the solution temperature is 950 ℃, the matrix microstructure is bimodal structure and the TiBw reinforcement distributes along the primary α phase. When the solution temperature is 1050 ℃, equiaxed α phase is transformed into lamellar α phase and α colony, β grain boundary appears and TiBw distributes along β grain boundary. When the solution temperature is 1150 ℃, the matrix microstructure is Widmanstatten structure, β grain boundary is further expanded, the α colony is more slender and TiBw distributes along β grain boundary or α colony. After the heat treatment, the room temperature tensile strength and yield strength of the composites increase with the increase of solution temperature, while the room temperature plasticity shows the opposite trend.更多还原