Wang X.-L.,Baoji Group Ltd. |
Wang W.-Q.,Baoji Group Ltd. |
Zhao F.-L.,Baoji Group Ltd. |
Mao Q.,Baoji Group Ltd. |
And 2 more authors.
Zhuzao/Foundry | Year: 2014
Casting and mechanical properties of high-temperature titanium alloys BTi-62421 were studied. The results show that BTi-62421s alloy fluidity and filling are worse than ZTA2 and ZTC4, but better than Ti-55; solidification shrinkage characteristics are similar to the ZTC4, both concentration of shrinkage tendency exist, shrinkage rate is less than Ti-55; new high-temperature titanium alloy crack resistance is better than the Ti-55, less than ZTC4; as cast structure is α-phase crystalline, and has excellent high temperature mechanical properties.
Zhang H.,North University of China |
Zhang Z.,North University of China |
Zhang X.,North University of China |
Li B.,North University of China |
Ma H.-H.,Baoji Group Ltd.
Rare Metals | Year: 2011
Samples of BTi-62421S alloy were compressed on the Gleeble-3800 heat simulation machine. The compression test was carried out in the temperature range from 850 to 1050 °C with strain rate range from 0.01 to 30 s -1 and the deformation of 70%. The stress-strain curve and apparent differences of microstructures were obtained. Hot deformation characteristics and microstructure evolutions of BTi-62421S alloy were analyzed. The results show that BTi-62421S alloy is very sensitive to temperature and strain rate, and the flow stress significantly increases with the decreasing of the temperature and the increasing of strain rate. Meanwhile, the softening mechanism of deformation is dynamic recrystallization in the a + β two phase regions and dynamic recovery in the β phase regions. © The Nonferrous Metals Society of China and Springer-Verlag Berlin Heidelberg 2011.