杨柳,王莹,林崇智,江健,方强,耿乃涛.Ti-15V-3Cr-3Sn-3Al钛合金固溶-时效过程的析出行为研究[J].稀有金属材料与工程,2019,48(6):1936~1943.[yangliu,wangying,linchongzhi,jiangjian,fangqiang,gengnaitao.Studies on the precipitation behavior during solution and aging heat treatment of titanium alloy Ti–15V–3Cr–3Al–3Sn[J].Rare Metal Materials and Engineering,2019,48(6):1936~1943.]
Ti-15V-3Cr-3Sn-3Al钛合金固溶-时效过程的析出行为研究
投稿时间:2018-02-02  修订日期:2018-02-22
中文关键词:  Ti-15V-3Cr-3Sn-3Al  固溶-时效处理  微观组织结构  析出强化
基金项目:
中文摘要:
      通过对Ti-15V-3Cr-3Sn-3Al钛合金进行不同工艺的固溶-时效处理,采用扫描电镜(SEM)、透射电镜(TEM)等方法研究了固溶-时效工艺对材料析出行为和力学性能的影响。结果表明:经过980℃×0.5h固溶处理后,组织中出现有大量亚稳态的马氏体α"相,通过随后的时效处理,组织中将析出有不同数量和形态的α析出相,随着时效温度升高或时间增长,析出相数量增多,形态由无规则聚集态向针状转变,析出物的尺寸和间距也增大。材料时效过程中析出大量纳米级弥散分布的α析出相,形成的α/β相界面对位错运动起到阻碍作用,从而提高合金强度,析出相数量越多,越细小,强化作用越大。而塑性主要取决于析出相在晶界上的分布形态和数量,晶界α相的形貌对材料的塑性有重大影响,连续的晶界α相分布会严重损害材料的塑性。
Studies on the precipitation behavior during solution and aging heat treatment of titanium alloy Ti–15V–3Cr–3Al–3Sn
英文关键词:Ti-15V-3Cr-3Sn-3Al  Solution and aging process  Microstructure  Precipitation strengthening
英文摘要:
      The effects of solution and aging process on the precipitation behavior and mechanical properties of Ti-15V-3Cr-3Sn-3Al titanium alloy were investigated by means of scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that there are a large number of metastable martensite α" phases in the microstructure after solution treatment at 980℃×0.5h. After the aging treatment, the precipitates with different quantities and morphology are formed. With the increase of aging temperature or time, the number of precipitates increases, the morphology changes from irregular aggregation to acicular, and the size and spacing of precipitates also increase. During the aging process, a large number of nano dispersed α phases were precipitated, and the formation of the α/β phase interface hindered the dislocation movement, thus increasing the strength of the alloy. The more and smaller the precipitated phase is, the better the strengthening effect. The plasticity depends mainly on the distribution and number of precipitates on grain boundaries. The morphology of grain boundary α phase has a great influence on the plasticity of the material, and the continuous distribution of grain boundary α phase will seriously damage the plasticity of the material.
作者单位E-mail
杨柳 攀钢集团研究院有限公司 钒钛资源综合利用国家重点实验室 yang512liu@126.com 
王莹 攀钢集团研究院有限公司 钒钛资源综合利用国家重点实验室  
林崇智 攀钢集团研究院有限公司 钒钛资源综合利用国家重点实验室  
江健 攀钢集团研究院有限公司 钒钛资源综合利用国家重点实验室  
方强 攀钢集团研究院有限公司 钒钛资源综合利用国家重点实验室  
耿乃涛 攀钢集团研究院有限公司 钒钛资源综合利用国家重点实验室  
摘要点击次数: 138
全文下载次数: 70
查看全文  查看/发表评论  
关闭