Yield and strain rate potentials for aluminum alloy sheet forming design

1998 ◽  
Vol 4 (4) ◽  
pp. 931-938 ◽  
Author(s):  
Kwansoo Chung ◽  
Frédéric Barlat ◽  
Jeong-Whan Yoon ◽  
Owen Richmond ◽  
John C. Brem ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Strain Rate ◽  
Sheet Forming ◽  
Alloy Sheet ◽  
Aluminum Alloy Sheet

High strain rate tensile testing of automotive aluminum alloy sheet

2005 ◽  
Vol 32 (1-4) ◽  
pp. 541-560 ◽  
Author(s):  
R. Smerd ◽  
S. Winkler ◽  
C. Salisbury ◽  
M. Worswick ◽  
D. Lloyd ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
High Strain Rate ◽  
Strain Rate ◽  
Tensile Testing ◽  
High Strain ◽  
Alloy Sheet ◽  
Aluminum Alloy Sheet

Microstructure and Texture Evolution of 2024 Aluminum Alloy Sheet under Different Loading Conditions

2018 ◽  
Vol 920 ◽  
pp. 236-243
Author(s):  
Peng Zhou ◽  
Lei Deng ◽  
Xin Yun Wang
Keyword(s):  
Aluminum Alloy ◽  
Strain Rate ◽  
Tensile Deformation ◽  
Texture Evolution ◽  
Deformation Texture ◽  
Alloy Sheet ◽  
Loading Conditions ◽  
Aluminum Alloy Sheet ◽  
2024 Aluminum Alloy ◽  
Goss Texture

To study microstructure and texture evolution of 2024 aluminum alloy sheet under different loading conditions, thermal tensile and compression experiments of 2024 aluminum alloy rolled sheets were carried out at temperatures ranging from 300 °C to 450 °C and under strain rates ranging from 0.001 s-1 to 0.1 s-1. During tensile deformation, the HABs of original grains are directly elongated until abruption. DRX process occurs during compression. Dislocations appear during deformation, migrate and accumulate into LABs, and then rotate into HABs to form new grain.The three-dimensional orientation distribution functions (ODFs) in different stress states were measured, with related texture types and distribution laws compared. According to ODFs with a constant φ2, the deformation texture of {011} <100>Goss texture is gradually strengthened during thermal tension at high temperature and low strain rate (450°C/0.001s-1). The deformation texture of {011} <100>Goss texture is weakened with the strain increasing. Furthermore, the increase of deformation temperature or the decrease of strain rate slows down the weakening process of {011} <100> Goss texture, which is attributed to the recrystallization behavior during tensile deformation. Besides, since the recrystallization process proceeds more completely during hot compression, it produces a quasi-random texture.

Analysis of Nonisothermal Deep Drawing of Aluminum Alloy Sheet With Induced Anisotropy and Rate Sensitivity at Elevated Temperatures

2013 ◽  
Vol 136 (1) ◽  
Author(s):  
Kamyar Ghavam ◽  
Reza Bagheriasl ◽  
Michael J. Worswick
Keyword(s):  
Aluminum Alloy ◽  
Strain Rate ◽  
Deep Drawing ◽  
Elevated Temperatures ◽  
Tensile Tests ◽  
Alloy Sheet ◽  
Material Behavior ◽  
Aluminum Alloy Sheet ◽  
Rate Dependency ◽  
Strain Rate Dependency

In this paper, a finite element model is developed for 3000 series clad aluminum alloy brazing sheet to account for temperature and strain rate dependency, as well as plastic anisotropy. The current work considers a novel implementation of the Barlat YLD2000 yield surface in conjunction with the Bergstrom hardening model to accurately model aluminum alloy sheet during warm forming. The Barlat YLD2000 yield criterion is used to capture the anisotropy while the Bergstrom hardening rule predicts the temperature and strain rate dependency. The results are compared with those obtained from experiments. The measured stress–strain curves of the AA3003 aluminum alloy sheet at elevated temperatures and different strain rates are used to fit the Bergstrom parameters and measured R-values and directional yield stresses are used to fit the yield function parameters. Isothermal uniaxial tensile tests and nonisothermal deep drawing experiments are performed and the predicted response using the new constitutive model is compared with measured data. In simulations of tensile tests, the material behavior is predicted accurately by the numerical models. Also, the nonisothermal deep drawing simulations are able to predict the load–displacement response and strain distributions accurately.

scholarly journals Study of the Portevin-Le Chatelier (PLC) Characteristics of a 5083 Aluminum Alloy Sheet in Two Heat Treatment States

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1533 ◽  
Author(s):  
Ni Tian ◽  
Guangdong Wang ◽  
Yiran Zhou ◽  
Kun Liu ◽  
Gang Zhao ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Strain Rate ◽  
Flow Behavior ◽  
Alloy Sheet ◽  
Strain Rates ◽  
Aluminum Alloy Sheet ◽  
Yield Plateau ◽  
Β Phase ◽  
Lower Strain ◽  
5083 Aluminum Alloy

In the present work, the role of Mg atoms in the form of either Mg clusters or β phase on the moving dislocations in 5083 aluminum alloy sheet were investigated by comparing the plastic flow behavior and Portevin-Le Chatelier (PLC) character in annealed and quenched conditions. It is found that the tensile strength of quenched sheets at different strain rates is slightly higher than those under annealed condition while the yield strength at both conditions is similar. In annealed sheets, the yield plateau was clearly observed at all tested strain rates with a strain less than 0.012, and its width increased with the increasing strain rate. However, no yield plateau was observed in quenched sheets. On the other hand, the characters of PLC are greatly varied with applied conditions and strain rate. Generally, annealed sheets have a higher waiting time, but lower critical strain/stress at lower strain rate (~1 × 10−4 s−1), but they are similar at a higher strain rate (1 × 10−2 s−1). However, the falling time at both annealed and quenched conditions are almost the same at tested strain rates.

The Flow Stress Characteristic and Constitutive Equation of 6016 Aluminum Alloy in Warm Forming

2011 ◽  
Vol 228-229 ◽  
pp. 1112-1117 ◽  
Author(s):  
Ji Xiang Zhang ◽  
Hui Wen ◽  
Wei Feng ◽  
Guo Yin An ◽  
Jin Xi Liu
Keyword(s):  
Aluminum Alloy ◽  
Flow Stress ◽  
Constitutive Equation ◽  
Strain Rate ◽  
Deformation Temperature ◽  
Linear Regression Analysis ◽  
Alloy Sheet ◽  
Warm Forming ◽  
Aluminum Alloy Sheet ◽  
6016 Aluminum Alloy

In order to realize numerical simulation of warm forming and reasonably establish the warm formation process parameters for 6016 aluminum alloy, we study the forging process of 6016 aluminum alloy with warm compression experiments on the Gleele-1500 thermal simulation testing machine, and research the deformation flow stress behavior of the aluminum alloy sheet at different temperatures , strain rate under the warm forming. The results show that the deformation temperature and strain rate have significant influence on flow stress of 6016 aluminum alloy sheet, that is, the alloy is a temperature and strain rate sensitive materials, and the flow stress increases with the increase of strain rate and decreases with the increase of deformation temperature. The deformation constitutive equation of 6016 aluminum alloy is got by multiple linear regression analysis. The constitutive equation is consistent with the experimental curves rather well, which confirms the accuracy of the constitutive equation.

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