Characteristic of Deformation of Ti-6Al-4V Alloy with Hydrogen at High Temperature

2007 ◽  
Vol 353-358 ◽  
pp. 683-686
Author(s):  
Zhong Hua Li ◽  
Qing Wang ◽  
Dong Li Sun ◽  
Li Ping Zhang
Keyword(s):  
High Temperature ◽  
Hydrogen Content ◽  
Hot Deformation ◽  
Deformation Behavior ◽  
Volume Fraction ◽  
Deformation Resistance ◽  
Compressive Behavior ◽  
Hot Deformation Behavior ◽  
Microstructure Observation ◽  
Hydrogenation Time

The effects of hydrogen on the microstructure and hot deformation behavior of Ti-6Al-4V alloy were studied, and the differences of microstructure and high temperature compressive behavior between the specimens hydrogenised various time at 700 oC and with the same hydrogen contents were analyzed. The results showed that the addition of hydrogen decreases the deformation resistance of Ti-6Al-4V alloy at high temperature. The flow stresses of specimens with the same hydrogen content declined as the prolongation of hydrogenating time. The microstructure observation indicated that stick-type microstructure was obtained in Ti-6Al-4V alloy annealed at 700 oC for 2 hours. Hydrogenation at 700 oC for 2 hours resulted in fine α plate in β transformed microstructure. When the hydrogenation time was prolonged to 6 hours, the volume fraction of newly-formed α plates increased and the prior α plates became coarser.

Hot Deformation Behavior of the 30%Mo/Cu-Al2O3 Composite Prepared by Vacuum Hot-Pressed Sintering

2011 ◽  
Vol 117-119 ◽  
pp. 893-896
Author(s):  
Yong Liu ◽  
Yong Wei Sun ◽  
Bao Hong Tian ◽  
Jiang Feng ◽  
Yi Zhang
Keyword(s):  
High Temperature ◽  
Strain Rate ◽  
Hot Deformation ◽  
Deformation Behavior ◽  
Flow Behavior ◽  
Peak Stress ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Compression Tests ◽  
Hot Deformation Behavior

Hot deformation behavior of the 30%Mo/Cu-Al2O3 composite was investigated by hot compression tests on Gleeble-1500D thermal simulator in the temperature ranges of 450~750°C and the strain rate ranges of 0.01~5s-1, as the total strain is 0.7. The results show that the peak stress increases with the decreased deformation temperature or the increased strain rate. Based on the true stress-strain curves, the established constitutive equation represents the high-temperature flow behavior of the composite, and the calculated flow stresses are in good agreement with the high- temperature deformation experimental results.

Study on Hot Deformation Behavior of 97# High Strength Rod

2012 ◽  
Vol 159 ◽  
pp. 322-325
Author(s):  
Hong Bin Li ◽  
Fang Fang
Keyword(s):  
Hot Deformation ◽  
Deformation Behavior ◽  
Static Recrystallization ◽  
Volume Fraction ◽  
High Strength ◽  
Avrami Equation ◽  
Recrystallization Process ◽  
Hot Deformation Behavior ◽  
Deformation Behaviors ◽  
Gleeble 3500

the hot deformation behaviors of 97# High Strength Rod was investigated through double-hit compression experiments using Gleeble 3500 thermal-mechanical similar within the temperature range of 850~1100°C, the strain rate of 5 s-1 and the interval range of 1-100s, the softening fractiong at different pass interval and deforming temperature was determined and analyzed. The results show that when pass intervals is the same, as deformation temperature increase, the volume fraction of static recrystallization of 97# High Strength Rod increases and the recrystallization process is enchanced. Activation energy of austenite static recrystallization of 97# High Strength Rod is 100.476 kJ/mol. The kinetic equation of static recrystallization of 97# High Strength Rod by avrami equation wan obtained.

Prediction of FV520B Steel Flow Stresses at High Temperature and Strain Rates

2015 ◽  
Vol 34 (6) ◽  
Author(s):  
Xiaolan Han ◽  
Shengdun Zhao ◽  
Chenyang Zhang ◽  
Shuqin Fan ◽  
Fan Xu
Keyword(s):  
High Temperature ◽  
Constitutive Equations ◽  
Hot Deformation ◽  
Deformation Behavior ◽  
Strain Rates ◽  
Isothermal Compression ◽  
Compression Tests ◽  
Hot Deformation Behavior ◽  
Wide Range ◽  
Steel Flow

AbstractIn order to develop reliable constitutive equations for the simulation, the hot deformation behavior of FV520B steel was investigated through isothermal compression tests in a wide range of temperatures from 900 °C to 1100 °C at an interval of 50 °C and strain rate from 0.01 to 10 s

Hot Deformation Behavior of 980MPa δ-TRIP Steel

2021 ◽  
Vol 1035 ◽  
pp. 368-376
Author(s):  
Jian Fu ◽  
Peng Chen ◽  
Hong Liang Yi
Keyword(s):  
High Temperature ◽  
Hot Deformation ◽  
Trip Steel ◽  
Deformation Behavior ◽  
Electron Backscatter Diffraction ◽  
Light Element ◽  
Rolling Process ◽  
Compression Tests ◽  
Hot Deformation Behavior ◽  
Sensitive Material

The δ-TRIP steel has attracted wide attention from researchers and industry, as it possesses the mechanical properties of the third-generation advanced automotive steels, and the lower density achieved by the addition of light element aluminum. However, there have been few studies on the hot deformation behavior of δ-TRIP steel at high temperature, which is critical for the design of the hot rolling process. In the present study, hot compression tests were carried out on a 980 MPa δ-TRIP steel to achieve a better understanding of the deformation behavior at high temperatures from 800°C to 1150°C. Combined with the electron backscatter diffraction (EBSD) analysis, the results showed that δ-TRIP steel was a positive strain-rate sensitive material, and its soften was contributed by dynamic re-crystallization of ferrite and austenite during deformation at high temperature. The hot deformation activation energy (Q = 327.485 kJ/mol) of the experimental steel was calculated, and the strain index was 5.65. Besides, the related constitutive equation and the flow stress equation were also established.

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