摘要
采用光学显微镜、电子探针和拉伸实验研究单重退火处理对BTi-6431S合金显微组织和力学性能的影响。结果表明:随退火温度的升高,合金中的初生α相粗化,趋于等轴状,体积分数逐渐降低;β相和次生α相的体积分数增加。随退火温度的升高,合金的室温强度先升高后降低,高温强度则逐渐升高;但是室温和高温塑性均不断下降。经过980℃退火处理后,BTi-6431S合金获得良好的高温强度和室温塑性匹配,此时合金650℃的抗拉强度达到600 MPa以上,室温伸长率超过8%。
The effects of single annealing on the microstructure and mechanical properties of BTi-6431S titanium alloy were studied by OM,EPMA and tensile test.The results show that,with increasing annealing temperature,the primary α phase becomes coarse,then changes into equiaxed shape,and its volume fraction decreases gradually,while the volume fractions of β phase and secondary α phase increase.With elevating the annealing temperature,the room temperature strength increases at first and then decreases,while the high temperature strength increases gradually,but the room-temperature and high-temperature ductility decreases.After annealing at 980 ℃,BTi-6431S alloy acquires good strength at high-temperature and plasticity at room-temperature.The ultimate tensile strength at 650 ℃ can reach more than 600 MPa,and the room-temperature elongation is more than 8%.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2013年第6期1530-1535,共6页
The Chinese Journal of Nonferrous Metals
基金
有研总院创新基金资助项目(23056)
