Samples of Ti-Al-Zr-Sn-Mo-Si-Y alloy were compressed on the Gleeble-1500 heat stimulation machine. The compression test was carried out in the temperature range from 800 ℃ to 1 100 ℃ and strain rate range from 0.001...Samples of Ti-Al-Zr-Sn-Mo-Si-Y alloy were compressed on the Gleeble-1500 heat stimulation machine. The compression test was carried out in the temperature range from 800 ℃ to 1 100 ℃ and strain rate range from 0.001 s-1 to 10 s-1. Stress-strain behavior and variation of microstructure of the alloy during hot compression were investigated. The experimental results show that the alloy is sensitive to temperature and strain rate,and the flow softening behavior is more obvious with the decrease of deformation temperature. At higher strain rate,discontinuous yielding is observed in β phase region. When deformed in α+β phase region,with the increment of deformation temperature,the lamellar α structures globularization is more quick and more uniform. When deformed in β phase region,coarse β grains can be got because of high deformation temperature.展开更多
用在高温下与钛反应性低的石墨型,采用真空自耗电极凝壳炉浇注,运用正交试验设计,测定了Al、Mo含量对Ti Al Mo 1Zr系铸造钛合金铸造工艺性能的影响。试验结果表明:Al增加合金的流动性和收缩率,而Mo的作用则是降低合金的流动性和收缩率...用在高温下与钛反应性低的石墨型,采用真空自耗电极凝壳炉浇注,运用正交试验设计,测定了Al、Mo含量对Ti Al Mo 1Zr系铸造钛合金铸造工艺性能的影响。试验结果表明:Al增加合金的流动性和收缩率,而Mo的作用则是降低合金的流动性和收缩率。在所讨论的范围内,该系合金的流动性指标远大于100mm,线收缩率不大于1 2%,集中缩孔率小于1 0%,均不出现热裂纹,表明该系合金的铸造工艺性能良好。展开更多
基金Projects(50434030, 2007CB613805) supported by the National Natural Science Foundation of China
文摘Samples of Ti-Al-Zr-Sn-Mo-Si-Y alloy were compressed on the Gleeble-1500 heat stimulation machine. The compression test was carried out in the temperature range from 800 ℃ to 1 100 ℃ and strain rate range from 0.001 s-1 to 10 s-1. Stress-strain behavior and variation of microstructure of the alloy during hot compression were investigated. The experimental results show that the alloy is sensitive to temperature and strain rate,and the flow softening behavior is more obvious with the decrease of deformation temperature. At higher strain rate,discontinuous yielding is observed in β phase region. When deformed in α+β phase region,with the increment of deformation temperature,the lamellar α structures globularization is more quick and more uniform. When deformed in β phase region,coarse β grains can be got because of high deformation temperature.
文摘用在高温下与钛反应性低的石墨型,采用真空自耗电极凝壳炉浇注,运用正交试验设计,测定了Al、Mo含量对Ti Al Mo 1Zr系铸造钛合金铸造工艺性能的影响。试验结果表明:Al增加合金的流动性和收缩率,而Mo的作用则是降低合金的流动性和收缩率。在所讨论的范围内,该系合金的流动性指标远大于100mm,线收缩率不大于1 2%,集中缩孔率小于1 0%,均不出现热裂纹,表明该系合金的铸造工艺性能良好。
