Hot deformation flow behavior of powder metallurgy based Al-SiC and Al-Al2O3 composite in a single step and two-step uni-axial compression

2019 ◽  
Vol 151 ◽  
pp. 563-581 ◽  
Author(s):  
Kanhu Charan Nayak ◽  
Prashant P. Date
Keyword(s):  
Powder Metallurgy ◽  
Axial Compression ◽  
Hot Deformation ◽  
Flow Behavior ◽  
Single Step ◽  
Al2o3 Composite

scholarly journals The Investigation on Flow Behavior of Powder Metallurgy Ti-10V-2Fe-3Al Alloy Using the Prasad Stability Criterion

2019 ◽  
Vol 50 (11) ◽  
pp. 5314-5323 ◽  
Author(s):  
Krystian Zyguła ◽  
Marek Wojtaszek ◽  
Oleksandr Lypchanskyi ◽  
Tomasz Śleboda ◽  
Grzegorz Korpała ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Power Dissipation ◽  
Hot Deformation ◽  
High Efficiency ◽  
Flow Instability ◽  
Flow Behavior ◽  
Material Model ◽  
Instability Criterion ◽  
Processing Maps ◽  
Compression Tests

Abstract The hot deformation behavior of Ti-10V-2Fe-3Al alloy obtained by the powder metallurgy (PM) method was investigated. Material for the research was produced by blending of elemental powders followed by uniaxial hot pressing. Thermomechanical tests of Ti-10V-2Fe-3Al compacts were carried out to determinate the stress-strain relationships at the temperature range of 800 °C to 1000 °C and strain rate between 0.01 and 10 s−1. Based on the dynamic material model (DMM) theory, processing maps at constant strain value were developed using data obtained from hot compression tests. The processing maps were elaborated for the final strain value, which was 0.9, and with flow instability criterion domains applied to it. Two critical regions associated with the flow behavior of the investigated material were revealed. Microstructural changes during hot deformation at various temperatures and strain rates were discussed. The correlation between calculated efficiency of power dissipation, flow instability criterion, and microstructure evolution was determined. The presence of defects was confirmed in regions predicted by the instability maps. The microstructure of the investigated alloy, corresponding to the high efficiency of power dissipation characterized by the occurrence of dynamic recrystallization (DRX) phenomena, was also shown. Additionally, average hardness values in relation to variable process parameters were designated. Based on the conducted studies and analysis, processing windows for Ti-10V-2Fe-3Al alloy compacts were proposed.

The Constitutive Model for High Temperature Flow Behavior of SiC/6168Al Composite

2015 ◽  
Vol 1089 ◽  
pp. 37-41
Author(s):  
Jiang Wang ◽  
Sheng Li Guo ◽  
Sheng Pu Liu ◽  
Cheng Liu ◽  
Qi Fei Zheng
Keyword(s):  
Constitutive Model ◽  
Hot Deformation ◽  
Flow Behavior ◽  
Type Equation ◽  
Strain Rate Range ◽  
Compression Tests ◽  
Stress Strain ◽  
Hollomon Parameter ◽  
Proposed Model ◽  
Relationship Of

The hot deformation behavior of SiC/6168Al composite was studied by means of hot compression tests in the temperature range of 300-450 °C and strain rate range of 0.01-10 s-1. The constitutive model was developed to predict the stress-strain curves of this composite during hot deformation. This model was established by considering the effect of the strain on material constants calculated by using the Zenter-Hollomon parameter in the hyperbolic Arrhenius-type equation. It was found that the relationship of n, α, Q, lnA and ε could be expressed by a five-order polynomial. The stress-strain curves obtained by this model showed a good agreement with experimental results. The proposed model can accurately describe the hot flow behavior of SiC/6168Al composite, and can be used to numerically analyze the hot forming processes.

Constitutive Equation for 3104 Alloy at High Temperatures in Consideration of Strain

2016 ◽  
Vol 35 (6) ◽  
pp. 599-605 ◽  
Author(s):  
Fuqiang Zhen ◽  
Jianlin Sun ◽  
Jian Li
Keyword(s):  
Hot Deformation ◽  
Flow Behavior ◽  
Temperature Correction ◽  
Strain Rates ◽  
Compression Tests ◽  
Hot Deformation Behavior ◽  
Element Analysis ◽  
Hollomon Parameter ◽  
The Finite Element Analysis ◽  
Effects Of Temperature

AbstractThe flow behavior of 3104 aluminum alloy was investigated at temperatures ranging from 250°C to 500°C, and strain rates from 0.01 to 10 s−1 by isothermal compression tests. The true stress–strain curves were obtained from the measured load–stroke data and then modified by friction and temperature correction. The effects of temperature and strain rate on hot deformation behavior were represented by Zener–Hollomon parameter including Arrhenius term. Additionally, the influence of strain was incorporated considering the effect of strain on material constants. The derived constitution equation was applied to the finite element analysis of hot compression. The results show that the simulated force is consistent with the measured one. Consequently, the developed constitution equation is valid and feasible for numerical simulation in hot deformation process of 3104 alloy.

An analysis of hot deformation of an Al–Cu–Mg alloy produced by powder metallurgy

2003 ◽  
Vol 339 (1-2) ◽  
pp. 43-52 ◽  
Author(s):  
F Bardi ◽  
M Cabibbo ◽  
E Evangelista ◽  
S Spigarelli ◽  
M Vukčevič
Keyword(s):  
Powder Metallurgy ◽  
Hot Deformation ◽  
Mg Alloy

scholarly journals Flow behavior and 3D processing map for hot deformation of Ti-2.7Cu alloy

2020 ◽  
Vol 9 (3) ◽  
pp. 2652-2661 ◽  
Author(s):  
Xuan Zhou ◽  
Kelu Wang ◽  
Shiqiang Lu ◽  
Xin Li ◽  
Rui Feng ◽  
...  
Keyword(s):  
Hot Deformation ◽  
Processing Map ◽  
Flow Behavior ◽  
3D Processing

scholarly journals Constitutive Models for the Prediction of the Hot Deformation Behavior of the 10%Cr Steel Alloy

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2873 ◽  
Author(s):  
Abdallah Shokry ◽  
Samer Gowid ◽  
Ghias Kharmanda ◽  
Elsadig Mahdi
Keyword(s):  
Relative Error ◽  
Hot Deformation ◽  
Mean Squared Error ◽  
Flow Behavior ◽  
Constitutive Models ◽  
Superior Performance ◽  
Steel Alloy ◽  
Statistical Parameters ◽  
Average Absolute Relative Error ◽  
Ann Models

The aim of this paper is to establish a reliable model that provides the best fit to the specific behavior of the flow stresses of the 10%Cr steel alloy at the time of hot deformation. Modified Johnson–Cook and strain-compensated Arrhenius-type (phenomenological models), in addition to two Artificial Neural Network (ANN) models were established with the view toward investigating their stress prediction performances. The ANN models were trained using Scaled Conjugate Gradient (SCG) and Levenberg–Marquardt (LM) algorithms. The prediction accuracy of the established models was evaluated using the following well-known statistical parameters: (a) correlation coefficient (R), (b) Average Absolute Relative Error (AARE), (c) Root Mean Squared Error (RMSE), and Relative Error (RE). The results showed that both of the modified Johnson–Cook and strain-compensated Arrhenius models could not competently predict the flow behavior. On the contrary, the results indicated that the two proposed ANN models precisely predicted the flow stress values and that the LM-trained ANN provided a superior performance over the SCG-trained model, as it yielded an RMSE of as low as 0.441 MPa.

Flow behavior and processing map for hot deformation of W-1.5ZrO2 alloy

2019 ◽  
Vol 802 ◽  
pp. 118-128 ◽  
Author(s):  
Zhou Li ◽  
Yunbo Chen ◽  
Shizhong Wei ◽  
Fangnao Xiao ◽  
Sajid Hussain Siyal ◽  
...  
Keyword(s):  
Hot Deformation ◽  
Processing Map ◽  
Flow Behavior
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