摘要
通过等温热压缩试验和金相分析研究了热变形参数对Ti-17(Ti-5Al-4Mo-4Cr-2Sn-2Zr)合金片状α球化过程的影响。结果表明:合金组织由网篮组织转化为等轴α组织的球化过程引起了高温流变应力的软化;等轴化的程度随变形程度、应变速率的增加而增大,随变形温度的提高而减小;变形程度是片状球化的主要因素;在相同温度下,提高应变速率能够加快片状组织完全球化的速度。
The effect of processing parameters on the globularization of lamellar α microstructure in Ti-17(Ti-5Al-4Mo-4Cr-2Sn-2Zr) alloy was studied by isothermal compression test and metallurgical analysis.The results show that the lamellar structure turns to the equiaxed α structure, the structure globularization causes flow stress softening;the globularization of lamellar α increases with increasing strain and strain rate, and decreases with increasing heating temperature; the deformation degree is the major factor of globularization and enhancing the strain rate can accelerate the speed of the globularization.
出处
《热加工工艺》
CSCD
北大核心
2005年第1期16-18,41,共4页
Hot Working Technology
关键词
Ti-17钛合金
压缩试验
流动应力
球化
Ti-17 titanium alloy
hot compression experiments
flow stress
globularization
