2618-Ti合金热压缩流变行为及变形组织  

Flow behavior and deformation microstructure of alloy 2618-Ti processed by hot compression

作　　者：李静[1,2,3] 王建华[1,3] 宋沅峰 苏旭平[1,3] 伍波[1,3] 彭浩平[1,3] 

机构地区：[1]常州大学材料科学与工程学院,江苏常州213164 [2]马勒发动机零部件(营口)有限公司,辽宁营口115000 [3]常州大学先进金属材料常州市重点实验室,江苏常州213164

出　　处：《材料热处理学报》2013年第9期6-12,共7页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51074030);江苏省青蓝工程(2010现代热镀锌技术)

摘　　要：在Gleeble-3500热模拟试验机上对2618．Ti合金进行高温热压缩变形实验，研究该合金在温度为300—500℃范围内以50℃递增和应变速率分别为0．001、0．01、0．1和1．0S。条件下的流变应力行为和变形组织。结果表明，流变应力随变形温度的升高而减小，而随应变速率的增加而增大；2618-Ti合金的稳态流变应力方程能较准确的预测合金的稳态流变应力。在不同的变形区域，2618-Ti合金的变形组织随变形温度和应变速率不同具有明显的变化。To investigate flow behavior and deformation microstructure of alloy 2618-Ti, the hot compression tests were performed on a Gleeble-3500 thermal simulator at deformation temperature ranged from 300 ℃ to 500 ℃and strain rate of 0. 001 to 1.0 s , respectively. The results show that flow stress decreases with increasing deformation temperature, and increase with increasing strain rate. The steady flow stress can be well predicted by flow stress equation of 2618-Ti alloy at steady state. The deformation microstructure of the alloy at different deformation areas is affected remarkably by the variation of temperature and strain rate in hot compression.

关 键 词：2618-Ti合金 热压缩变形 流变应力行为 变形组织 

分 类 号：TG146.2[一般工业技术—材料科学与工程]