Flow softening behavior of Ti–13V–11Cr–3Al beta Ti alloy in double-hit hot compression tests

Single- and double-hit hot compression tests were performed at 1030 °C and strain rate of 0.1 s−1 on Ti–13V–11Cr–3Al beta Ti alloy to investigate the flow behavior and mechanism of microstructural evolution during the interpass period. It was observed that the flow stress level and the extent of yie...

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Bibliographic Details
Published in:Journal of materials research 2016-12, Vol.31 (24), p.3900-3906
Main Authors: Momeni, A., Abbasi, S.M., Morakabati, M., Ghazi Mirsaed, S.M.
Format: Article
Language:English
Subjects:
Alloys
Analysis
Applied and Technical Physics
Biomaterials
Deformation
Evolution
Fluid mechanics
Grain boundaries
Grain growth
Grain size
Grains
Hot pressing
Hot rolling
Inorganic Chemistry
Inverse
Materials Engineering
Materials research
Materials Science
Microstructure
Nanotechnology
Recrystallization
Studies
Titanium base alloys
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Summary:Single- and double-hit hot compression tests were performed at 1030 °C and strain rate of 0.1 s−1 on Ti–13V–11Cr–3Al beta Ti alloy to investigate the flow behavior and mechanism of microstructural evolution during the interpass period. It was observed that the flow stress level and the extent of yield point phenomena (YPP) were increased by an increase in the grain size. After the first pass, the microstructure was bimodal of large deformed grains and small recrystallized grains formed by continuous dynamic recrystallization. The increase in the interpass time to 100 s, led to the decrease in the yield drop and extent of YPP. However, the further increase in the interpass time to 300 s would result in an inverse effect. A combination between static recrystallization and metadynamic recrystallization was found responsible for grain refinement in the samples subjected to the interpass times below 100 s. At longer interpass times, i.e., 300 s, grain growth increased the average grain size.
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2016.430