摘要
用金相显微镜、透射电镜和电子拉伸机研究了固溶时效处理对Ti—15—3合金组织和力学性能的影响。结果表明，Ti-15-3合金经固溶与时效处理后，析出的针状α相随原始β相晶粒尺寸的增大而变得细小、均匀，合金的强度增大，塑性降低；在仅相析出形式一致的前提下，强度的高低取决于α相的尺寸和α相所占体积分数；在650～710℃高温时效状态下，温度越高析出的α相越少且尺寸细小。因此，合金的强度和塑性受α相的数量、大小、均匀性等综合因素的影响。
Effects of solution and ageing treatments on the microstructure and mechanical properties of Ti-15-3 alloy were studied by metalloscope,TEM and electron tensile testing machine. The results show that along with β phase grain size increasing the acicular α phase precipitated becomes fine and even, the strength of the alloy increases and the plasticity decreases after the solution and ageing treatments. Under the prerequisite for identical forms of α precipitation, the strength of the alloy depends on α phase size and α phase proportion in volume. In the condition of ageing with high temperature from 650℃ to 710℃ ,the α phase precipitated becomes less in volume and fine in size with the temperature rising. Therefore, the strength Kev words,Ti-15-3 titani and plasticity are influenced by synthetical factors of α phase＇s quantity,size and homogeneity.
出处
《金属热处理》
EI
CAS
CSCD
北大核心
2007年第4期23-26,共4页
Heat Treatment of Metals
关键词
TI-15-3合金
Α相
高温时效
组织与性能
Ti-15-3 titanium alloy
α phase
high-temperature ageing
microstructure and property
