Abstract
The effect of β grain size on stress-induced martensitic transformation in β solution-treated 51.1Zr-40.2Ti-4.5Al-4.2V alloy was investigated by using XRD and TEM techniques. The results show that initial β grain size has a profound effect on the triggering stress of the stress-induced martensitic (SIM) transformation. The triggering stress increases with increasing initial β grain size. The SIM transformation significantly affects the deformation behavior of the alloy. A typical double yielding is observed in the stress-strain curves due to the occurrence of the SIM transformation. The curve of work hardening rate vs. true strain is divided into three stages for the samples with small β grain size. The work hardening rate at stage ΙΙ or ΙΙΙ decreases with increasing initial β grain size, which is attributed to the effect of the SIM transformation during a tensile test.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (Grant No. 51804087), the Innovative Talents Teams Project of Guizhou Province (Grant No. 20175656), the Hundred-level Innovative Talents Project of Guizhou Province (Grant No. 20164014 and 20165654), and the Engineering Research Center Project from Guizhou provincial education department (Grant No. 2017016).
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Tan, Y., Liu, W., Xiang, S. et al. Effect of β Grain Size on Stress-Induced Martensitic Transformation in β Solution-Treated 51.1Zr-40.2Ti-4.5Al-4.2V Alloy. Metall Mater Trans A 49, 6040–6045 (2018). https://doi.org/10.1007/s11661-018-4913-8
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DOI: https://doi.org/10.1007/s11661-018-4913-8