Thermal deformation behavior and processing maps of 7075 aluminum alloy sheet based on isothermal uniaxial tensile tests

2018 ◽  
Vol 767 ◽  
pp. 856-869 ◽  
Author(s):  
Jue Lu ◽  
Yanli Song ◽  
Lin Hua ◽  
Kailun Zheng ◽  
Dingguo Dai
Keyword(s):  
Aluminum Alloy ◽  
Deformation Behavior ◽  
Thermal Deformation ◽  
Tensile Tests ◽  
Alloy Sheet ◽  
Uniaxial Tensile ◽  
Processing Maps ◽  
7075 Aluminum Alloy ◽  
Aluminum Alloy Sheet

scholarly journals Hot Deformation Behavior of a 2024 Aluminum Alloy Sheet and its Modeling by Fields-Backofen Model Considering Strain Rate Evolution

Metals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 243 ◽  
Author(s):  
Zhubin He ◽  
Zhibiao Wang ◽  
Yanli Lin ◽  
Xiaobo Fan
Keyword(s):  
Aluminum Alloy ◽  
Strain Rate ◽  
Deformation Behavior ◽  
Strain Distribution ◽  
Tensile Tests ◽  
Alloy Sheet ◽  
Image Correlation ◽  
Aluminum Alloy Sheet ◽  
2024 Aluminum Alloy ◽  
Local Flow

The deformation behavior of a 2024 aluminum alloy sheet at elevated temperatures was studied by uniaxial hot tensile tests over the nominal initial strain rate range of 0.001–0.1 s−1 and temperature range of 375–450 °C. In order to analyze the deformation behavior with higher accuracy, a digital image correlation (DIC) system was applied to determine the strain distribution during hot tensile tests. Local stress-strain curves for different local points on the specimens were calculated. The strain rate evolution of each point during the tensile tests was investigated under different deformation conditions. Then, an improved Fields–Backofen (FB) model, taking into account the local strain rate evolution instead of the fixed strain rate, was proposed to describe the constitutive behaviors. It has been found that obvious non-uniform strain distribution occurred when the true strain was larger than 0.3 during hot tensile tests. The strain rate distribution during deformation was also non-uniform. It showed increasing, steady, and decreasing variation tendencies for different points with the increasing of strain, which led to the local flow stress being different at different local points. The flow stresses predicted by the improved FB model showed good agreement with experimental results when the strain rate evolutions of local points during tensile tests were considered. The prediction accuracy was higher than that of traditional FB models.

Numerical Analysis for Process Parameter Effect in Electromagnetic Impact Welding of Aluminum Alloy Sheet

2014 ◽  
Vol 548-549 ◽  
pp. 297-300
Author(s):  
Dae Yong Kim ◽  
Hyeon Il Park ◽  
Ji Hoon Kim ◽  
Sang Woo Kim ◽  
Young Seon Lee
Keyword(s):  
Aluminum Alloy ◽  
Numerical Analysis ◽  
Deformation Behavior ◽  
Three Dimensional ◽  
Alloy Sheet ◽  
Aluminum Alloy Sheet ◽  
Sheet Metals ◽  
Charge Voltage ◽  
Flat Sheet ◽  
Impact Welding

Studies on electromagnetic impact welding between similar or dissimilar flat sheet metals using the flat one turn coil have been recently achieved. In this study, three dimensional electromagnetic-mechanical coupled numerical simulations are performed for the electromagnetic impact welding of aluminum alloy sheets with flat rectangular one turn coil. The deformation behavior during impact welding was examined. The effect of process parameters such as charge voltage, standoff distance and gap distance were investigated.

Experimental and Numerical Investigations on Hot Deformation Behavior and Processing Maps for ASS 304 and ASS 316

2018 ◽  
Vol 37 (9-10) ◽  
pp. 873-888 ◽  
Author(s):  
Nitin Kotkunde ◽  
Hansoge Nitin Krishnamurthy ◽  
Swadesh Kumar Singh ◽  
Gangadhar Jella
Keyword(s):  
Experimental Data ◽  
Strain Rate ◽  
Hot Deformation ◽  
Deformation Behavior ◽  
Constitutive Models ◽  
Tensile Tests ◽  
Uniaxial Tensile ◽  
Processing Maps ◽  
Hot Deformation Behavior ◽  
Statistical Measures

AbstractA thorough understanding of hot deformation behavior plays a vital role in determining process parameters of hot working processes. Firstly, uniaxial tensile tests have been performed in the temperature ranges of 150 °C–600 °C and strain rate ranges of 0.0001–0.01s−1 for analyzing the deformation behavior of ASS 304 and ASS 316. The phenomenological-based constitutive models namely modified Fields–Backofen (m-FB) and Khan–Huang–Liang (KHL) have been developed. The prediction capability of these models has been verified with experimental data using various statistical measures. Analysis of statistical measures revealed KHL model has good agreement with experimental flow stress data. Through the flow stresses behavior, the processing maps are established and analyzed according to the dynamic materials model (DMM). In the processing map, the variation of the efficiency of the power dissipation is plotted as a function of temperature and strain rate. The processing maps results have been validated with experimental data.

Research on the effect of flow stress calculation on aluminum alloy sheet deformation behavior based on warm bulging test

2015 ◽  
Vol 21 (2) ◽  
pp. 365-373 ◽  
Author(s):  
Gaoshen Cai ◽  
Lihui Lang ◽  
Kangning Liu ◽  
Sergei Alexandrov ◽  
Dongxing Zhang ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Flow Stress ◽  
Deformation Behavior ◽  
Alloy Sheet ◽  
Aluminum Alloy Sheet ◽  
Stress Calculation ◽  
Behavior Based ◽  
Bulging Test ◽  
Sheet Deformation

scholarly journals Research on aluminum alloy sheet thermoplastic deformation behavior based upon warm bulging test

AIP Advances ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 025023 ◽  
Author(s):  
Gaoshen Cai ◽  
Xiaojun Zhou ◽  
Lihui Lang ◽  
Sergei Alexandrov
Keyword(s):  
Aluminum Alloy ◽  
Deformation Behavior ◽  
Alloy Sheet ◽  
Aluminum Alloy Sheet ◽  
Behavior Based ◽  
Bulging Test

scholarly journals Anisotropic Deformation Behavior of Al2024T351 Aluminum Alloy

2013 ◽  
Vol 10 (1) ◽  
pp. 80 ◽  
Author(s):  
R Khan
Keyword(s):  
Aluminum Alloy ◽  
Yield Strength ◽  
Deformation Behavior ◽  
Yield Criterion ◽  
Tensile Tests ◽  
Rolled Plate ◽  
Uniaxial Tensile ◽  
Element Analysis ◽  
Yield Criteria ◽  
Von Mises

 The objective of this work was to investigate the effects of material anisotropy on the yielding and hardening behavior of 2024T351 aluminum alloy using isotropic and anisotropic yield criteria. Anisotropy may be induced in a material during the manufacturing through processes like rolling or forging. This induced anisotropy gives rise to the concept of orientation-dependent material properties such as yield strength, ductility, strain hardening, fracture strength, or fatigue resistance. Inclusion of the effects of anisotropy is essential in correctly predicting the deformation behavior of a material. In this study, uniaxial tensile tests were first performed in all three rolling directions, L , T  and S , for smooth bar specimens made from hot rolled plate of Al2024 alloy. The experimental results showed that the L - and T -directions yielded higher yield strengths and a greater percentage of elongation before fracture than the S -direction. Subsequently, finite element analysis of tensile specimens was performed using isotropic (von Mises) and anisotropic (Hill) yield criteria to predict the onset of yielding and hardening behaviors during the course of deformation. Hill's criterion perfectly fitted with the test data in the S -direction, but slightly underestimated the yield strength in L -direction. The results indicated that the Hill yield criterion is the most suitable one to predict the onset of yielding and hardening behaviors for 2024T351 aluminum alloy in all directions. 

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