Analysis for Flow Stress Model of 33Mn2V Steel

2012 ◽  
Vol 450-451 ◽  
pp. 1553-1556
Author(s):  
Hui Fan ◽  
Fu Zhong Wang
Keyword(s):  
Deformation Behavior ◽  
Regression Method ◽  
Linear Regression Method ◽  
Oil Well ◽  
Strain Rates ◽  
Compression Tests ◽  
Hot Deformation Behavior ◽  
Deformation Activation Energy ◽  
Recrystallized Grain Size ◽  
Flow Stress Model

Hot compressive deformation behavior of non-modulation 33Mn2V steel for oil well tube was studied by compression tests using Gleeble-1500 thermal simulation machine conducted at the temperatures from 750°Cto 1200°Cand at the strain rates of 0.01 s−1 to 0.16 s−1. Using non-linear regression method to establish a Kumar model to predict the hot deformation behavior of 33Mn2V steel. Results show that the errors of the Kumar model between experimental data and calculated results are less than 10%. The deformation activation energy of 342.1841kJ/ mol. The average dynamically recrystallized grain size reduces with decreasing temperature.

High Temperature Deformation Behavior and Dynamic Recrystallization Law of 33Mn2V Steel for Oil Well Tube

2014 ◽  
Vol 511-512 ◽  
pp. 63-69
Author(s):  
Rui Jia ◽  
Fu Zhong Wang
Keyword(s):  
Dynamic Recrystallization ◽  
Deformation Behavior ◽  
Hot Compression ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Oil Well ◽  
Strain Rates ◽  
Compression Tests ◽  
Hot Deformation Behavior ◽  
Activation Energy Of Deformation

Deformation behavior of steel 33Μn2v for oil well tube was studied by hot compression tests conducted at various temperatures and strain rates.The Kumar model was developed to predict the hot deformation behavior of steel 33Mn2V for oil well tube.In this regard,the hot compression tests were carried out at the temperatures from 750°C to 1200°C and at the strain rates of 0.02s1 to 0.16 s1.The experimental data were then used to determine the constants of developed constitutive equations. The Kumar model can be represented by ZenerHollomon parameter in a hyperbolic sinusoidal equation form.The apparent activation energy of deformation is calculated to be 342.1481kJ/Mol.Dynamic recrystallization of steel 33Mn2V occur and the completion of the critical deformation is small,termination error and the initial deformation is smaller.Therefore,its easy for the steel 33Mn2V to the occurrence and completion of dynamic recrystallization.

scholarly journals Microstructure and Hot Deformation Behavior of Twin Roll Cast Mg-2Zn-1Al-0.3Ca Alloy

Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1020 ◽  
Author(s):  
Kristina Kittner ◽  
Madlen Ullmann ◽  
Thorsten Henseler ◽  
Rudolf Kawalla ◽  
Ulrich Prahl
Keyword(s):  
Hot Deformation ◽  
Deformation Behavior ◽  
Flow Instability ◽  
Grain Structure ◽  
Strain Rates ◽  
Compression Tests ◽  
Cast State ◽  
Hot Deformation Behavior ◽  
Twin Roll Cast ◽  
Twin Roll

In the present work, the microstructure, texture, mechanical properties as well as hot deformation behavior of a Mg-2Zn-1Al-0.3Ca sheet manufactured by twin roll casting were investigated. The twin roll cast state reveals a dendritic microstructure with intermetallic compounds predominantly located in the interdendritic areas. The twin roll cast samples were annealed at 420 °C for 2 h followed by plane strain compression tests in order to study the hardening and softening behavior. Annealing treatment leads to the formation of a grain structure, consisting of equiaxed grains with an average diameter of approximately 19 µm. The twin roll cast state reveals a typical basal texture and the annealed state shows a weakened texture, by spreading basal poles along the transverse direction. The twin roll cast Mg-2Zn-1Al-0.3Ca alloy offers a good ultimate tensile strength of 240 MPa. The course of the flow curves indicate that dynamic recrystallization occurs during hot deformation. For the validity range from 250 °C to 450 °C as well as equivalent logarithmic strain rates from 0.01 s−1 to 10 s−1 calculated model coefficients are shown. The average activation energy for plastic flow of the twin roll cast and annealed Mg-2Zn-1Al-0.3Ca alloy amounts to 180.5 kJ/mol. The processing map reveals one domain with flow instability at temperatures above 370 °C and strain rates ranging from 3 s−1 to 10 s−1. Under these forming conditions, intergranular cracks arose and grew along the grain boundaries.

scholarly journals Hot Deformation Behavior and Processing Maps of Fe-30Mn-0.11C Steel

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1940 ◽  
Author(s):  
Jianmei Kang ◽  
Yuhui Wang ◽  
Zhimeng Wang ◽  
Yiming Zhao ◽  
Yan Peng ◽  
...  
Keyword(s):  
Dynamic Recrystallization ◽  
Hot Deformation ◽  
Deformation Behavior ◽  
True Strain ◽  
Peak Stress ◽  
Strain Rates ◽  
Processing Maps ◽  
Compression Tests ◽  
Hot Deformation Behavior ◽  
High Deformation

Hot deformation behavior of Fe-30Mn-0.11C steel was investigated. Hot compression tests were carried out at various temperatures ranging from 800 °C to 1200 °C and at different strain rates of 0.01 s−1 to 10 s−1. The constitutive equation based on peak stress was established. Hot processing maps at different strains and recrystallization diagrams were also established and analyzed. The results show that dynamic recrystallization easily occur at high deformation temperatures and low strain rates. Safe and unstable zones are determined at the true strain of 0.6 and 0.7, and the hot deformation process parameters of partial dynamic recrystallization of the tested steel are also obtained.

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.

Hot Deformation Behavior of Multi-Size Al2O3 Particles Dispersion Strengthened Copper Base Composite

2013 ◽  
Vol 721 ◽  
pp. 270-273
Author(s):  
Xue Rui Yang ◽  
Bao Hong Tian ◽  
Yi Zhang ◽  
Yong Liu
Keyword(s):  
Flow Stress ◽  
Hot Deformation ◽  
Deformation Behavior ◽  
Compression Tests ◽  
Hot Deformation Behavior ◽  
Copper Base ◽  
Softening Mechanism ◽  
Deformation Activation Energy ◽  
Base Composite ◽  
Hot Press Sintering

The multi-size Al2O3 particles dispersion strengthened copper base composite (i.e. Al2O3/Cu-0.6%Al2O3 composite) was prepared by the vacuum hot-press sintering-internal oxidizing method. The hot deformation behavior of Al2O3/Cu-0.6%Al2O3 composite was investigated by the isothermal compression tests at the temperature range from 600°C to 950°C and strain rates of 0.001 s-1 and 1s-1 respectively with a Gleeble-1500D thermal simulator system. The results show that the flow stress-strain curves of Al2O3/Cu-0.6%Al2O3 composites indicate the softening mechanism of recrystallization. The flow stress increases with the deformation strain increasing, then decreases and tends to be steady. The hot deformation activation energy is calculated as 116.46 kJ/mol for the Al2O3/Cu-0.6%Al2O3 composite. The strain-stress constitutive equation is established on the basis of above results.

scholarly journals Characterization of Hot Deformation Behavior in a 13% Chromium Steel

2018 ◽  
Vol 941 ◽  
pp. 458-467
Author(s):  
Nima Safara Nosar ◽  
Fredrik Sandberg ◽  
Göran Engberg
Keyword(s):  
Hot Deformation ◽  
Deformation Behavior ◽  
Peak Stress ◽  
Chromium Steel ◽  
Hot Compression ◽  
Strain Rates ◽  
Compression Tests ◽  
Hot Deformation Behavior ◽  
Hollomon Parameter

The behavior of a 13% chromium steel subjected to hot deformation has been studied by performing hot compression tests in the temperature range of 850 to 12000C and at strain rates from 0.01 to 10 s-1. The uniaxial hot compression tests were performed on a Gleeble thermo-mechanical simulator. The best function that fits the peak stress for the material and its relation to the Zener-Hollomon parameter (Z) is derived. The average activation energy of this alloy in the entire test domain was found to be about 557 [kJmol-1] and the dynamic recrystallization (DRX) kinetics was studied to find the fraction DRX during deformation.

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

scholarly journals Deformation Behavior and Microstructural Evolution of Inconel 625 Superalloy during the Hot Compression Process

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 824
Author(s):  
Fulong Chen ◽  
Kaidi Li ◽  
Bin Tang ◽  
Degui Liu ◽  
Hong Zhong ◽  
...  
Keyword(s):  
Microstructural Evolution ◽  
Deformation Behavior ◽  
Hot Compression ◽  
Inconel 625 ◽  
Processing Temperature ◽  
Strain Rates ◽  
Compression Tests ◽  
Hot Deformation Behavior ◽  
Compression Process ◽  
Inconel 625 Superalloy

Hot deformation behavior and the microstructural evolution of Inconel 625 superalloy plates are investigated by hot compression tests in a range of working temperatures (800–1050 °C) and strain rates (0.001–1 s−1). The microstructural observation shows that a strong <110> texture forms when the processing temperature is below 950 °C, whose intensity decreases with the increases of the temperature, and it disappears when compressing above 950 °C. During the compression test, twin-related dynamic recrystallization (DRX) occurs in the investigated temperature range, and the intensity of twin-related DRX increases with the increases of the temperature. In addition, as the temperature increases, the intensity of continuum DRX decreases.

scholarly journals Role of Vanadium Addition on Hot Deformation Behavior of Aluminum Alloy 5083

Metals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 766
Author(s):  
Wang ◽  
Wang ◽  
Zhu ◽  
Xu ◽  
Cui ◽  
...  
Keyword(s):  
Activation Energy ◽  
Grain Size ◽  
Hot Deformation ◽  
Deformation Behavior ◽  
Strain Rates ◽  
Processing Maps ◽  
Compression Tests ◽  
Hot Deformation Behavior ◽  
Aluminum Alloy 5083

The effect of V addition on the hot deformation behavior of AA5083 was investigated. Single axial compression tests were conducted on the cast and homogenized samples with strain rates ranging from 0.01 to 10 s−1 and deformation temperatures ranging from 300 to 450 °C. The results showed that the contents of V (0–0.10, in wt.%) do not change the grain size of alloy 5083 significantly in the as cast and homogenized conditions, but the formation of fine Al3V particles in the alloy with an addition of 0.05 wt.% V can increase the flow stress, and its activation energy is 10.0% higher than that of V-free alloy 5083. The processing maps show that the appropriate process domain for alloy 5083 with 0.05 wt.% V changes at different true strains. The mechanism for deformation softening is discussed as well.

Hot Deformation Behavior of as-Cast AZ61 Magnesium Alloy

2013 ◽  
Vol 750-752 ◽  
pp. 574-578
Author(s):  
Zhong Xue Feng ◽  
Qing Nan Shi ◽  
Fu Sheng Pan ◽  
Jun Tan ◽  
Liang Wei Chen ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Deformation Behavior ◽  
High Strain ◽  
Shear Zones ◽  
Strain Rates ◽  
Compression Tests ◽  
Hot Deformation Behavior ◽  
Thermal Compression ◽  
Az61 Magnesium Alloy ◽  
The Matrix

Thermal compression tests of AZ61 magnesium alloy were performed at deformation temperature 25-400°C with strain rates ranged from 0.02 to 20 s-1, and the microstructure was studied. The conventional dynamic recrystallization (DRX) and shear zones were observed on grain boundaries at temperatures above 200°C. The shear zone and the temperature rise are considered to be responsible for the fracture of specimens. For the large internal stress concentration in the shear zones and the deformation incompatibility between matrix and shear zones, the fracture grew along with the shear zones and the failure occurred in the large deformation field of the matrix at the high strain rate 20 s-1 even at 400°C.

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