Effect of processing parameters on the hot deformation behavior of as-cast TC21 titanium alloy

The hot deformation behavior of an Al-Zn-Mg-Cu alloy was investigated by hot compression test at deformation temperatures varying from 320 to 440 °C with strain rates ranging from 0.01 to 10 s−1. The results show that the Mg(Zn, Cu)2 particles as a result of the sufficient static precipitation prior to hot compression have an influence on flow softening. A constitutive model compensated with strain was developed from the experimental results, and it proved to be accurate for predicting the hot deformation behavior. Processing maps at various strains were established. The microstructural evolution demonstrates that the dominant dynamic softening mechanism stems from dynamic recovery (DRV) and partial dynamic recrystallization (DRX). The recrystallization mechanism is continuous dynamic recrystallization (CDRX). The microstructure observations are in good agreement with the results of processing maps. On account of the processing map and microstructural observation, the optimal hot processing parameters at a strain of 0.6 are at deformation temperature range of 390–440 °C and strain rate range of 0.010–0.316 s−1 with a peak efficiency of 0.390.

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Hot deformation behavior originated from dislocation activity and β to α phase transformation in a metastable β titanium alloy

International Journal of Plasticity ◽

10.1016/j.ijplas.2019.03.011 ◽

2019 ◽

Vol 119 ◽

pp. 200-214 ◽

Cited By ~ 4

Author(s):

Ke Hua ◽

Yudong Zhang ◽

Weimin Gan ◽

Hongchao Kou ◽

Benoit Beausir ◽

...

Keyword(s):

Titanium Alloy ◽

Phase Transformation ◽

Hot Deformation ◽

Deformation Behavior ◽

Hot Deformation Behavior ◽

Dislocation Activity ◽

Α Phase

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Hot Deformation Behavior and Processing Map of Ti-6Al-3Nb-2Zr-1Mo Titanium Alloy

Rare Metal Materials and Engineering ◽

10.1016/s1875-5372(16)30097-2 ◽

2016 ◽

Vol 45 (4) ◽

pp. 901-906 ◽

Cited By ~ 7

Author(s):

Haisheng Chen ◽

Xianghong Liu ◽

Guangfa Liu ◽

Xiaodong Tang ◽

Jinhua Luo ◽

...

Keyword(s):

Titanium Alloy ◽

Hot Deformation ◽

Deformation Behavior ◽

Processing Map ◽

Hot Deformation Behavior

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Characterization of hot deformation behavior of a biomedical titanium alloy TLM

Materials Science and Engineering A ◽

10.1016/j.msea.2014.01.005 ◽

2014 ◽

Vol 598 ◽

pp. 236-243 ◽

Cited By ~ 18

Author(s):

X.F. Bai ◽

Y.Q. Zhao ◽

W.D. Zeng ◽

Z.Q. Jia ◽

Y.S. Zhang

Keyword(s):

Titanium Alloy ◽

Hot Deformation ◽

Deformation Behavior ◽

Hot Deformation Behavior ◽

Biomedical Titanium Alloy

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Hot deformation behavior of TC18 titanium alloy

Thermal Science ◽

10.2298/tsci1305523j ◽

2013 ◽

Vol 17 (5) ◽

pp. 1523-1528

Author(s):

Bao-Hua Jia ◽

Wei-Dong Song ◽

Hui-Ping Tang ◽

Jian-Guo Ning

Keyword(s):

Titanium Alloy ◽

Flow Stress ◽

Strain Rate ◽

Hot Deformation ◽

Deformation Behavior ◽

True Strain ◽

Testing Machine ◽

Constitutive Relationship ◽

Compression Tests ◽

Hot Deformation Behavior

Isothermal compression tests of TC18 titanium alloy at the deformation temperatures ranging from 25?C to 800?C and strain rate ranging from 10-4 to 10-2 s-1 were conducted by using a WDW-300 electronic universal testing machine. The hot deformation behavior of TC18 was characterized based on an analysis of the true stress-true strain curves of TC18 titanium alloy. The curves show that the flow stress increases with increasing the strain rate and decreases with increasing the temperature, and the strain rate play an important role in the flow stress when increasing the temperatures. By taking the effect of strain into account, an improved constitutive relationship was proposed based on the Arrhenius equation. By comparison with the experimental results, the model prediction agreed well with the experimental data, which demonstrated the established constitutive relationship was reliable and can be used to predict the hot deformation behavior of TC18 titanium alloy.

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