An investigation into the warm deformation behavior of Ti–6Al–1.5Cr–2.5Mo–0.5Fe–0.3Si alloy
An investigation into the warm deformation behavior of Ti–6Al–1.5Cr–2.5Mo–0.5Fe–0.3Si alloy
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DOI：
10.1016/j.msea.2015.12.065
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发表时间：
2016-01
期刊：
影响因子：
6.4
通讯作者：
E. Ghasemi;A. Zarei‐Hanzaki;S. Moemeni;M. Ghambari;M. Rezaee
中科院分区：
文献类型：
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作者：
E. Ghasemi;A. Zarei‐Hanzaki;S. Moemeni;M. Ghambari;M. Rezaee
研究了Ti-6Al-1.5Cr-2.5Mo-0.5Fe-0.3Si合金的组织演变和流动行为。在应变速率为0.001 ~ 0.1 s−1的温压缩条件下，研究了合金在100 ~ 600℃范围内的流动行为。结果表明，当温度高于400℃时，由于锥体滑移系统的激活，合金的成形性显著提高。此外，光学观测证实，由于低温下的绝热加热现象，微观结构中存在流动局部化和绝热剪切带。绝热加热也导致实验材料表现出负应变率敏感性行为。通过热拉伸试验，研究了该合金在100-400℃范围内的拉伸变形行为。结果表明：在较低温度下，α相晶粒沿拉伸方向呈拉长状，而在较高温度下，α相晶粒呈球状；
The microstructural evolution and the flow behavior of Ti–6Al–1.5Cr–2.5Mo–0.5Fe–0.3Si alloy were investigated in this research. The flow behavior of the alloy at temperatures in the range of 100–600 °C was studied using warm compression testing under the strain rate of 0.001–0.1 s−1. The results indicate that the formability of the alloy is significantly increased at temperatures higher than 400 °C due to the activation of pyramidal slip systems. Moreover, optical observations confirm the occurrence of flow localization and adiabatic shear banding within the microstructure due to the adiabatic heating phenomenon at lower temperatures. The adiabatic heating is also led the experimental material to exhibit a negative strain rate sensitivity behavior. The tensile deformation behavior of this alloy was also studied at temperatures in the range of 100–400 °C through warm tension testing. The results show that the alpha phase grains are elongated along the tensile direction at lower temperatures but would be globularized at higher temperatures.