Hot Deformation Behaviors and Processing Maps of 2024 Aluminum Alloy in As-cast and Homogenized States

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.

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Microstructure evolution and modeling of 2024 aluminum alloy sheets during hot deformation under different stress states

Metals and Materials International ◽

10.1007/s12540-017-7132-8 ◽

2018 ◽

Vol 24 (1) ◽

pp. 112-120 ◽

Cited By ~ 4

Author(s):

Lei Deng ◽

Peng Zhou ◽

Xinyun Wang ◽

Junsong Jin ◽

Ting Zhao

Keyword(s):

Aluminum Alloy ◽

Microstructure Evolution ◽

Hot Deformation ◽

2024 Aluminum Alloy ◽

Stress States

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Hot-Deformation Behavior and Hot-Processing Maps of AISI 410 Martensitic Stainless Steel

High Temperature Materials and Processes ◽

10.1515/htmp-2015-0145 ◽

2016 ◽

Vol 35 (9) ◽

pp. 929-940

Author(s):

Rong-Sheng Qi ◽

Miao Jin ◽

Bao-Feng Guo ◽

Xin-Gang Liu ◽

Lei Chen

Keyword(s):

Stainless Steel ◽

High Temperatures ◽

Hot Deformation ◽

Martensitic Stainless Steel ◽

Ferrite Content ◽

Optimum Process ◽

Processing Maps ◽

Delta Ferrite ◽

Deformation Behaviors ◽

Measured Flow

AbstractThe compressive deformation behaviors of 410 martensitic stainless steel were investigated on a Gleeble-1500 thermomechanical simulator, and the experimental stress–strain data were obtained. The measured flow stress was corrected for friction and temperature. A constitutive equation that accounts for the influence of strain was established, and the hot-processing maps at different strain were plotted. The microstructure evolution of the hot-deformation process was studied on the basis of microstructural observations at high temperatures. Phase-transformation experiments on 410 steel were conducted at high temperatures to elucidate the effects of temperature on the delta-ferrite content. The initial forging temperature and optimum process parameters were obtained on the basis of the processing map and the changes in the delta-ferrite content at high temperatures.

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Hot deformation behaviors and processing maps of Mg–Zn–Er alloys based on Gleeble–1500 hot compression simulation

Transactions of Nonferrous Metals Society of China ◽

10.1016/s1003-6326(16)64444-8 ◽

2016 ◽

Vol 26 (12) ◽

pp. 3123-3134 ◽

Cited By ~ 12

Author(s):

Cui-cui SUN ◽

Ke LIU ◽

Zhao-hui WANG ◽

Shu-bo LI ◽

Xian DU ◽

...

Keyword(s):

Hot Deformation ◽

Hot Compression ◽

Processing Maps ◽

Deformation Behaviors

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Modeling the Hot Deformation Behaviors of As-Extruded 7075 Aluminum Alloy by an Artificial Neural Network with Back-Propagation Algorithm

High Temperature Materials and Processes ◽

10.1515/htmp-2015-0108 ◽

2017 ◽

Vol 36 (1) ◽

pp. 1-13 ◽

Cited By ~ 13

Author(s):

Guo-zheng Quan ◽

Zhen-yu Zou ◽

Tong Wang ◽

Bo Liu ◽

Jun-chao Li

Keyword(s):

Neural Network ◽

Artificial Neural Network ◽

Aluminum Alloy ◽

Strain Rate ◽

Hot Deformation ◽

Back Propagation ◽

Bp Algorithm ◽

7075 Aluminum Alloy ◽

Ann Model ◽

Deformation Behaviors

AbstractIn order to investigate the hot deformation behaviors of as-extruded 7075 aluminum alloy, the isothermal compressive tests were conducted at the temperatures of 573, 623, 673 and 723 K and the strain rates of 0.01, 0.1, 1 and 10 s−1 on a Gleeble 1500 thermo-mechanical simulator. The flow behaviors showing complex characteristics are sensitive to strain, strain rate and temperature. The effects of strain, temperature and strain rate on flow stress were analyzed and dynamic recrystallization (DRX)-type softening characteristics of the flow behaviors with single peak were identified. An artificial neural network (ANN) with back-propagation (BP) algorithm was developed to deal with the complex deformation behavior characteristics based on the experimental data. The performance of ANN model has been evaluated in terms of correlation coefficient (R) and average absolute relative error (AARE). A comparative study on Arrhenius-type constitutive equation and ANN model for as-extruded 7075 aluminum alloy was conducted. Finally, the ANN model was successfully applied to the development of processing map and implanted into finite element simulation. The results have sufficiently articulated that the well-trained ANN model with BP algorithm has excellent capability to deal with the complex flow behaviors of as-extruded 7075 aluminum alloy and has great application potentiality in hot deformation processes.

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Study on the hot deformation behaviors of Al-Zn-Mg-Cu-Cr aluminum alloy

Acta Metallurgica Sinica (English Letters) ◽

10.1016/s1006-7191(08)60027-7 ◽

2008 ◽

Vol 21 (2) ◽

pp. 109-115 ◽

Cited By ~ 22

Author(s):

G LIN ◽

Z ZHANG ◽

H ZHANG ◽

D PENG ◽

J ZHOU

Keyword(s):

Aluminum Alloy ◽

Hot Deformation ◽

Deformation Behaviors

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Hot Deformation and Processing Map of C919 Aluminum Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.816.810 ◽

2015 ◽

Vol 816 ◽

pp. 810-817

Author(s):

Yong Biao Yang ◽

Zhi Min Zhang ◽

Xing Zhang

Keyword(s):

Aluminum Alloy ◽

Flow Stress ◽

Strain Rate ◽

Hot Deformation ◽

Testing Machine ◽

Strain Rate Range ◽

Hot Compression ◽

Strain Rates ◽

Processing Maps ◽

Compression Tests

The hot deformation behaviors of Aluminum alloy C919 were studied in the present investigation. The hot compression tests for C919 were carried out in the temperature range of 350°C~470°C and strain rates range of 0.001s-1~1s-1 using GLEEBLE-1500 thermal simulate testing machine. Optical microscopy (OM) was used for the microstructure characterization. The experimental results showed that the flow stress of C919 aluminum alloy decreased with increasing temperature and decreasing strain rates and the flow stress curves tended to increase at a strain rate of 1s-1 with increasing strain, while the flow stresses kept with increasing strain at lower strain rate. The alloys were more prone to dynamic recrystallization with decreasing strain rates during hot deformation. The hot compression behavior of C919 aluminum alloy can be described as hyperbolic sine function corrected Arrhenius relation. The processing maps for the alloy were built at a strain of 0.6. The instability deformation domain occurred at temperatures range from 350°C and 380°C and at a strain rate of 0.1-1s-1. Based on the processing maps and microstructure observations, the optimum hot-working parameters were determined to be at a temperature of 470°C in the strain rate range from 0.1-0.01s−1 for the C919 aluminum alloy.

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