Hot deformation behavior of GH4169 superalloy associated with stick δ phase dissolution during isothermal compression process

2012 ◽  
Vol 540 ◽  
pp. 164-173 ◽  
Author(s):  
Yongquan Ning ◽  
M.W. Fu ◽  
Xi Chen
Keyword(s):  
Hot Deformation ◽  
Deformation Behavior ◽  
Isothermal Compression ◽  
Hot Deformation Behavior ◽  
Compression Process ◽  
Phase Dissolution ◽  
Δ Phase ◽  
Gh4169 Superalloy

Influence of δ Phase Content on Hot Deformation Behavior of Ni-Based Superalloy IN718

2011 ◽  
Vol 314-316 ◽  
pp. 1159-1162
Author(s):  
Hai Yan Zhang ◽  
Shi Hong Zhang ◽  
Ming Cheng
Keyword(s):  
Hot Deformation ◽  
Deformation Behavior ◽  
Peak Stress ◽  
Hot Working ◽  
Peak Strain ◽  
Phase Content ◽  
Compression Tests ◽  
Hot Deformation Behavior ◽  
Deformation Activation Energy ◽  
Δ Phase

The effect of δ phase content on the hot deformation behavior of alloy IN718 has been investigated using isothermal compression tests. The results indicated that the δ phase has a significant effect on the deformation behavior of alloy IN718 during hot working. After the peak stress, the decreasing speed of the stress raises as the increase in the δ phase content. The deformation activation energy for alloy IN718 increases with the raise of the δ phase content. And the peak strain for the alloy decreases with the increase of the δ phase content, which indicates that the δ phase can stimulate the occurrence of dynamic recrystallization during hot working.

Flow behavior and microstructure evolution of PM Ti-5553 alloy during 0.1 s−1 hot deformation

2019 ◽  
Vol 34 (01n03) ◽  
pp. 2040026
Author(s):  
Qinyang Zhao ◽  
Fei Yang ◽  
Rob Torrens ◽  
Leandro Bolzoni
Keyword(s):  
Hot Deformation ◽  
Deformation Behavior ◽  
Dynamic Recovery ◽  
Flow Behavior ◽  
Intermediate Strain Rate ◽  
Isothermal Compression ◽  
Flow Localization ◽  
Hot Deformation Behavior ◽  
Deformation Degree ◽  
Dynamic Morphology

The hot deformation behavior of powder metallurgy Ti-5Al-5V-5Mo-3Cr (Ti-5553) alloy was investigated by isothermal compression test at the wide temperature range of [Formula: see text]–[Formula: see text]C, under an intermediate strain rate of 0.1 s[Formula: see text], and with the sample deformation degree of 30%, 50% and 70%. Results suggested that the flow stress was very sensitive to the deformation variables and it decreased with increasing the deformation temperature. Flow localization occurred when the temperature was lower than [Formula: see text]C, accompanied by the dynamic morphology changing of [Formula: see text] phase. Dynamic recovery (DRV) features appeared when the temperature was over [Formula: see text]C, while dynamic recrystallization (DRX) took a more important role than DRV for the alloy compressed at [Formula: see text]–[Formula: see text]C.

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

Study on Hot Deformation Behavior and Constitutive Relation of Cr-77.5Nb Alloy

2014 ◽  
Vol 898 ◽  
pp. 72-75
Author(s):  
Wen Wen Han ◽  
Shi Qiang Lu ◽  
Li Ping Deng
Keyword(s):  
Strain Rate ◽  
Constitutive Relation ◽  
Hot Deformation ◽  
Deformation Behavior ◽  
Stepwise Regression ◽  
Constant Strain Rate ◽  
Isothermal Compression ◽  
Hot Deformation Behavior ◽  
Deformation Parameters ◽  
Temperature Strain

Isothermal compression test at constant strain rate for Cr-77.5Nb alloy were performed on Gleeble simulator with conditions of deformation temperature from 800 to 1200°C and strain rate from 0.001s-1to 0.1s-1. The influence of deformation parameters including temperature, strain rate and strain related with flow stress during hot deformation were investigated and the constitutive relation of Cr-77.5Nb alloy was established by stepwise regression method. The result of error analysis shows that the constitutive relation established has high accuracy and can well characterize the hot deformation behavior of this alloy.

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