| About this Abstract |
| Meeting |
13th International Conference on the Technology of Plasticity (ICTP 2020)
|
| Symposium
|
13th International Conference on the Technology of Plasticity (ICTP 2020)
|
| Presentation Title |
Constitutive Modeling and Processing Map of Ti-5Al-5Mo-5V-3Cr-1Zr Alloy during Hot Deformation |
| Author(s) |
Yuting Zhou, Jie Zhou, Qian Shu |
| On-Site Speaker (Planned) |
Yuting Zhou |
| Abstract Scope |
Compression tests were performed on Ti55531 alloy within temperatures range of 1033-1153 K at strain rates 0.001-1 s-1. At higher strain rate, the flow curves are characterized by discontinuous yielding, followed by slight strain hardening before flow softening and/or steady state flow. The magnitude of discontinuous yield drop increases with increasing of temperature. This phenomenon is related to the sudden multiplication of mobile dislocations in grain boundaries. The flow behaviors were described by Arrhenius equation and the activation energy at strain of 0.5 was calculated as 274.563KJ/mol. Based on dynamic materials model, a processing map considering strain 0.9 was drawn. Flow instabilities were presented for all temperatures at higher strain rate 1 s-1. Flow stability region was observed at temperatures 1033-1123 K and at strain rates 0.001-0.1 s-1. The efficiency of power dissipation in stable domain is about 40-45%, which implies the dynamic recrystallization process during hot deformation. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |