摘要
通过对Ti 45Al 8 0Nb 0 2W 0 2B 0 1Y(原子百分数)合金的热压缩分析发现,其变形温度和变形速率对合金的真实应力-应变曲线以及变形后的组织有显著的影响。在低的变形温度和高的变形速率下,随应变量的增加合金呈现明显的软化现象,变形后存在大量的流线型组织,当变形温度达到1250℃、变形速率降到1×10-3s-1时,合金变形后的组织逐渐得到充分的再结晶,铸态组织得到明显的细化。
The deformation temperature and the strain rate have great effect on the true strain-stress curves and microstructures of Ti-45Al-8.0Nh 0. 2W-0.2B-0. 1 Y(atomicpercent) through the analyses of hot compression. Curves expresse strain-soften with the strain increasing at low deformation temperature and high strain tale. and the microstructures of TiAl alloys show much streamline shape. As the deformation temperature reaches 1250℃ and the strain rate reduces to 1 ×10^-3 s^-1. the microstructures become homogenous because of full recrystallization.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2005年第1期107-110,共4页
Acta Aeronautica et Astronautica Sinica
基金
国家863计划(2002AA305209)资助项目
关键词
高铌TIAL合金
微观组织
热变形
TiAl alloy containing high Nb
microstructure
hot deformation