Superplasticity Assisted by Stress-Induced Phase Transformation in Ti-5.5Al-1Fe Alloy

Koike, Junichi; Shimoyama, Y.; Okamura, Takeo; Maruyama, Kouichi

doi:10.4028/www.scientific.net/msf.304-306.183

Cited by 5 publications

(1 citation statement)

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“…In Ti alloys, due to the high heat capacity and low thermal conductivity, the deformation heat leads to an increase in the temperature of the sample and the activation of more sliding systems, which causes enhancement of the workability and work softening. 11 Also, microstructural evolutions such as DRV, 33 DRX, 34 DT of α to β 35 and DG of α phase 7 provide the work softening in the flow curves. Considering that the effect of deformation heat has been corrected for all flow curves in this study, so the work softening is affected only by microstructural evolutions.…”

Section: Resultsmentioning

confidence: 99%

Hot working behaviour of Ti–8Al–1Mo–1V alloy through the hot compression test

Ebrahimi,

Zarghani,

Ezatpour

et al. 2024

Materials Science and Technology

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Hot deformation behaviour of Ti–8Al–1Mo–1V alloy (Ti-811) was investigated through the hot compression tests at the temperatures of 950–1075 °C and at strain rates of 0.001–1 s−1. The flow curves of the Ti-811 alloy were successfully modelled by means of the sinh equation and constitutive equations were proposed for isothermal hot compression of Ti-811 alloy. According to the date of flow curves, the values were calculated for the strain rate sensitivity, stress exponent and activation energy. The amounts of the strain rate sensitivity, stress exponent, and activation energy were calculated as 0.19, 3.95 and 730 kJ mol−1 for α + β region and 0.21, 3.6 and 194 kJ mol−1 for β region, respectively.

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