scholarly journals Hot Compression Tests Using Total Lagrangian SPH Formulation in Energy-Based Framework

2020 ◽  
Author(s):  
Kadiata Ba
Keyword(s):  
Hot Compression ◽  
Compression Tests

Quantitative Analysis of Dynamic Softening Behaviors Induced by Dynamic Recrystallization for Ti-10V-2Fe-2Al Alloy

2015 ◽  
Vol 34 (6) ◽  
Author(s):  
Guozheng Quan ◽  
Shiao Pu ◽  
Hairong Wen ◽  
Zhenyu Zou ◽  
Jie Zhou
Keyword(s):  
Titanium Alloy ◽  
Quantitative Analysis ◽  
Dynamic Recrystallization ◽  
Hot Compression ◽  
Laboratory Scale ◽  
Compression Tests ◽  
Temperature Range ◽  
Height Reduction ◽  
Softening Behavior ◽  
Dynamic Softening

AbstractIn order to investigate the effect of dynamic recrystallization (DRX) behavior on dynamic softening behavior of wrought Ti-10V-2Fe-3Al titanium alloy, a series of laboratory scale isothermal hot compression tests with a height reduction of 60% were performed in a temperature range of 948 K~1023 K in the (

Hot Deformation Behaviors of SiCp/Al Composites

2014 ◽  
Vol 1058 ◽  
pp. 165-169 ◽  
Author(s):  
Shi Ming Hao ◽  
Jing Pei Xie
Keyword(s):  
Flow Stress ◽  
Strain Rate ◽  
Hot Deformation ◽  
True Strain ◽  
Constant Strain Rate ◽  
Hot Compression ◽  
Compression Tests ◽  
Sensitive Material ◽  
2024 Aluminum Alloy ◽  
Deformation Behaviors

The hot deformation behaviors of 30%SiCp/2024 aluminum alloy composites was studied by hot compression tests using Gleeble-1500 thermomechanical simulator at temperatures ranging from 350-500°C under strain rates of 0.01-10 s-1. The true stress-true strain curves were obtained in the tests. Constitutive equation and processing map were established. The results show that the flow stress decreases with the increase of deformation temperature at a constant strain rate, and increases with the increase of strain rate at constant temperature, indicating that composite is a positive strain rate sensitive material. The flow stress behavior of composite during hot compression deformation can be represented by a Zener-Hollomon parameter in the hyperbolic sine form. Its activation energy for hot deformation Q is 183.251 kJ/mol. The optimum hot working conditions for this material are suggested.

scholarly journals In-Depth Comparison of an Industrially Extruded Powder and Ingot Al Alloys

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1483
Author(s):  
David Bombač ◽  
Peter Cvahte ◽  
Martin Balog ◽  
Goran Kugler ◽  
Milan Terčelj
Keyword(s):  
Mechanical Properties ◽  
Hot Extrusion ◽  
Hot Compression ◽  
Hot Forming ◽  
Compression Tests ◽  
Extrusion Press ◽  
Conventional Aluminum Alloy ◽  
Al Powder ◽  
Thermal Stability Of ◽  
Suitable Process

An industrial press was used to consolidate compacted aluminum powder with a nominal diameter in the range of 1 µm. Direct and indirect hot-extrusion processes were used, and suitable process parameters were determined from heating conditions, ram speeds and billet temperatures. For comparison, a direct-extrusion press for hot extrusion of a conventional aluminum alloy AA 1050 was used. The extruded Al powder showed better mechanical properties and showed a thermal stability of the mechanical properties after annealing treatments. To increase the theoretical density of the directly extruded Al powder, single-hit hot-compression tests were carried out. Activation energies for hot forming were calculated from hot-compression tests carried out in the temperature range 300–580 °C, at different strain rates. Processing maps were used to demonstrate safe hot-working conditions, to obtain an optimal microstructure after hot forming of extruded Al powder.

Recrystallization Behaviors of an Al-Zn-Mg-Cu Alloy during Multi-Pass Hot Compression

2010 ◽  
Vol 638-642 ◽  
pp. 327-332 ◽  
Author(s):  
Jian Shen ◽  
Ju Peng Li ◽  
Liang Ming Yan ◽  
Xiao Dong Yan
Keyword(s):  
Microstructure Evolution ◽  
Rolling Process ◽  
Hot Compression ◽  
Compression Tests ◽  
Slow Cooling ◽  
7050 Aluminum Alloy ◽  
Subgrain Growth ◽  
Nucleation Mechanisms ◽  
Different Temperatures ◽  
Thermomechanical Processes

Dynamic recovery (DRV) and dynamic recrystallization (DRX) play important roles during thermomechanical processes of light metals and alloys because they have obvious influence on microstructure evolution and finally on the mechanical properties of the worked material. Hot compression tests of 7050 aluminum alloy was carried out on Gleeble1500D thermomechanical simulator to modeling multi-pass hot rolling process. Microstructure evolution features of the alloy deformed to a reduction up to 80% were investigated through OM, TEM and EBSD observations. DRX behavior of the alloy during hot compression was emphasized. Some evidence of continuous DRX can be found in the alloy deformed at different temperatures and reductions. The main nucleation mechanisms of DRX are subgrain coalescence and subgrain growth. However, static recrystallization takes place in the material during slow cooling after hot compression.

MODELING AND SIMULATION OF DYNAMIC RECRYSTALLIZATION AND GRAIN GROWTH DURING HOT WORKING OF INCONEL 783 SUPERALLOY

2010 ◽  
Vol 17 (01) ◽  
pp. 105-109 ◽  
Author(s):  
JONG-TAEK YEOM ◽  
EUN JEOUNG JUNG ◽  
JEE HOON KIM ◽  
JEOUNG HAN KIM ◽  
JAE-KEUN HONG ◽  
...  
Keyword(s):  
Grain Growth ◽  
Compression Test ◽  
Microstructure Evolution ◽  
Optimization Technique ◽  
Hot Compression ◽  
Hot Working ◽  
Least Square ◽  
Isothermal Heat Treatment ◽  
Compression Tests ◽  
Hot Compression Test

In this study, the modeling of recrystallization and grain growth was investigated to predict the microstructure evolution during hot working of INCONEL 783 superalloy (Alloy 783). The recrystallization model was constructed on the basis of the Avrami formation. A least-square optimization technique was used to determine several important parameters within the model from isothermal heat treatment and hot compression test results. High temperature compression tests were carried out under different temperatures, strain rates and strain conditions. The model for describing the recrystallization and grain growth behaviors of Alloy 783 was implemented onto the user-subroutine of a commercial FE code. In order to demonstrate the reliability of the model, the microstructure evolution of Alloy 783 alloy during the hot compression test was simulated and was accorded well with the experimental results.

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.

Microstructure and Texture Evolution of Repetitive Upsetting-Extruded (RUEed) Mg-Gd-Y-Zn-Zr Alloy after Hot Compression

2021 ◽  
Vol 1035 ◽  
pp. 63-71
Author(s):  
Bei Bei Dong ◽  
Zhi Min Zhang ◽  
Jian Min Yu ◽  
Xin Che
Keyword(s):  
Volume Fraction ◽  
Texture Evolution ◽  
Hot Compression ◽  
Compression Tests ◽  
Texture Intensity ◽  
Average Grain Size ◽  
Strain Stress ◽  
Increasing Temperature ◽  
Compression Texture ◽  
Zr Alloy

In order to determine the deformation temperature of next pass, the hot compression tests were performed by Gleeble-3800 at different temperature form 380 to 420 °C. The microstructure and texture evolution of repetitive upsetting-extruded (RUEed) Mg-Gd-Y-Zn-Zr alloy during hot compression were studied by electron backscattering diffraction (EBSD) analysis. The results showed that the dynamic recrystallization (DRX) occured during the hot compression processing from the strain-stress flow curves. When the temperature increased to 420 °C, the average grain size reduced to 6.64 μm, and the volume fraction of DRXed grains increased to 81.5%. All the compressed alloys exhibited a typical compression texture, the maximum texture intensity of {0001} plane gradually decreased with increasing temperature. When the compression temperature was up to 420°C, the the maximum texture intensity of {0001} plane was 3.207 due to the effect of DRXed grains. Finally, 420°C is chosen as the next deformation of next pass because of the more precipitation and DRXed grains.

Dynamic recrystallisation and modelling of microstructural evolution of high-titanium-content 6061 aluminium alloy

2020 ◽  
Vol 111 (4) ◽  
pp. 316-324
Author(s):  
Wei Chen ◽  
Yanfei Gu ◽  
Yingping Guan ◽  
Chunfa Dong
Keyword(s):  
Aluminium Alloy ◽  
Titanium Content ◽  
Hot Compression ◽  
Strain Rates ◽  
Compression Tests ◽  
Constitutive Analysis ◽  
Physically Based ◽  
Dynamic Recrystallisation ◽  
6061 Aluminium Alloy ◽  
High Titanium Content

Abstract The dynamic recrystallisation behaviour of high-titaniumcontent 6061 aluminium alloy was investigated by hot compression tests within the temperature range of 623- 783 K and at strain rates of 0.01 -10 s-1. The characteristics of the true stress-strain curves acquired in the hot compression tests were investigated, and it was observed that the dynamic recrystallisation of high-titanium-content 6061 aluminium alloy occurs within the range of deformation temperatures of 623 -783 K, with strain rates of 0.001 - 0.1 s-1as evinced by a physically-based constitutive analysis. The kinetic model of dynamic recrystallisation was deduced to describe the dynamic recrystallisation behaviour of high-titanium-content 6061 aluminium alloy, and the dynamic recrystallisation grain size model was also constructed.

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