新闻资讯
Ti-25Al-14Nb-2Mo-1Fe合金的热变形行为及组织演变规律
发布人：上海艾荔艾金属材料有限公司www.shailiai.com
更新时间：2015-09-13
在Gleeble-3500热模拟试验机上对Ti-25Al-14Nb-2Mo-1Fe合金进行等温恒应变速率压缩试验，研究在变形温度950~1100 ℃、变形速率0.001~1 s-1、最大变形程度为50%条件下合金的热变形行为，分析变形温度和变形速率对热变形组织演变规律的影响。
Ti-25Al-14Nb-2Mo-1Fe合金的热变形行为及组织演变规律Hot deformation behavior and microstructure evolution of Ti-25Al-14Nb-2Mo-1Fe alloy
在Gleeble-3500热模拟试验机上对Ti-25Al-14Nb-2Mo-1Fe合金进行等温恒应变速率压缩试验，研究在变形温度950~1100 ℃、变形速率0.001~1 s-1、最大变形程度为50%条件下合金的热变形行为，分析变形温度和变形速率对热变形组织演变规律的影响。结果表明：Ti-25Al-14Nb-2Mo-1Fe合金的流变应力对变形温度和变形速率均较为敏感，其流变应力—应变曲线具有应力峰值、流变软化和稳态流变特征。变形温度和变形速率对合金热变形组织演变影响较大。在变形温度为950和1050 ℃、变形速率为0.001~1 s-1条件下，随变形速率的降低，合金中片层组织球化，动态再结晶发生程度增大；在变形速率为0.1 s-1、变形温度为950~1100 ℃条件下，随变形温度的升高，合金中动态再结晶发生程度明显增大；在变形温度为950 ℃、变形速率为1 s-1条件下，合金中易形成绝热剪切带。
The hot deformation behavior of Ti-25Al-14Nb-2Mo-1Fe alloy was investigated at deformation temperatures between 950 and 1100 ℃ with strain rate between 0.001 and 1 s-1, and the highest reduction of 50% by using isothermal compression test on Gleeble-3500 simulator. The effects of deformation temperature and strain rate on the microstructure evolution during hot working were analyzed. The results show that the flow stress of the alloy is sensitive to the variation of deformation temperature and strain rate. The stress—strain curves exhibit a peak flow stress, flow softening and steady state flow behavior. The microstructure evolution is greatly affected by deformation temperature and strain rate. The degree of lamellar globularization and dynamic recrystallization increases with the strain rate decreasing in the strain rate range of 0.001-1 s-1 at 950 and 1 050 ℃. The degree of dynamic recrystallization increases with deformation temperature increasing in the range of 950-1 100 ℃ at 0.1 s-1. The shear deformation bands are easy to occur at 950 ℃ and 1 s-1, which should be avoided during hot working.
以上资料由上海艾荔艾金属材料有限公司提供，欢迎新老客户来电洽购。
本文来自上海艾荔艾金属材料有限公司http://www.shailiai.com，转载请注明出处。