Effect of Rolling Temperature on the Microstructure and Tensile Properties of 47Zr-45Ti-5Al-3V Alloy
The 47Zr-45Ti-5Al-3V (wt.%) alloy was solution-treated at 850 and 780 °C for 30 min and then rolled at different temperatures. The effect of rolling temperature on microstructure and tensile properties was investigated. The results showed that the microstructure contained a large amount of α phase at a rolling temperature of 600 °C. As the rolling temperature increased, the amount of α phase decreased, whereas the amount of β phase increased. When the rolling temperature was higher than 700 °C, the alloy was composed of a single β phase. The tensile properties of the alloy depended strongly on rolling temperature. The yield strength and tensile strength decreased with increasing rolling temperature, whereas the elongation increased. At a given rolling temperature, low solution treatment temperature resulted in higher strength and lower elongation than high solution treatment temperature. The fracture mode changed from cleavage fracture and quasi-cleavage fracture to dimple fracture with increasing rolling temperature.
Keywords47-45Ti-5Al-3V alloy deformation mechanical properties microstructure rolling tensile test
This work was supported by the Scientific Research Foundation for Introduced Talent of Guizhou University (Grant No. 201629), the Hundred-level Innovative Talents Project of Guizhou Province (Grant Nos. 20164014 and 20165654), and the Science and Technology granted by Guizhou Province for financial support (Grant No. 20146013).
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