武器系统地面设备Ti-B20合金时效过程组织与性能调控研究  

Research on the microstructure and performance control of Ti-B20 alloy during aging process for ground equipment in weapon system

作　　者：韩盼盼 柳书吉 冀宣名 HAN Panpan;LIU Shuji;JI Xuanming(Jiangnan Design&Research Institute of Machinery&Electriciby,Guiyang 550009,China;School of Materials and Metallurgy,Guizhou University,Guiyang 550025,China)

机构地区：[1]江南机电设计研究所,贵州贵阳550009 [2]贵州大学材料与冶金学院,贵州贵阳550025

出　　处：《贵州科学》2024年第4期86-89,共4页Guizhou Science

基　　金：国家自然科学基金(51974097);贵州省科技支撑计划(2022-050)。

摘　　要：基于武器系统地面设备对钛合金材料高强度使用的需求,开展影响Ti-B20合金力学性能的因素分析,采用金相显微镜(OM)、扫描电子显微镜(SEM)和X射线衍射(XRD)等技术研究了高压扭转变形对Ti-B20合金微观组织演变、时效行为及力学性能的影响。研究结果表明,Ti-B20合金在高压扭转(N=10)变形后没有发生相变,变形方式以位错滑移为主。经过固溶处理的合金在时效过程中析出针状α相,并且其沿着晶界析出。高压扭转变形的合金中产生大量的高密度位错区域,这些区域在时效过程中作为α相的优先形核位点,最终形成分布均匀的超细α相,导致显著的析出强化。Based on the requirement of high strength use of titanium alloy materials for weapon system ground equipment,the factors affecting the mechanical properties of Ti-B20 alloy were analyzed.The effect of high-pressure torsional deformation on the microstructure evolution,aging behavior and mechanical properties of Ti-B20 alloy was investigated by metallurgical microscopy(OM),scanning electron microscopy(SEM)and X-ray diffraction(XRD).The results showed that the Ti-B20 alloy did not undergo phase transformation after high-pressure torsional deformation(N=10),and the deformation mode was mainly dislocation slip.The alloy treated by solution treatment precipitated needle-likeαphase during aging and it precipitated along the grain boundaries.The high-pressure torsional deformation of the alloy produced a large number of high-density dislocation regions,which acted as preferential nucleation sites for theαphase during aging,and eventually formed a uniformly distributed ultrafineαphase,leading to significant precipitation strengthening.

关 键 词：Ti-B20合金 高压扭转 组织演变 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]