scholarly journals Damage evolution of 7075 aluminum alloy basing the Gurson Tvergaard Needleman model under high temperature conditions

2021 ◽  
Author(s):  
Hongchao Ji ◽  
Zheng Ma ◽  
Xiaomin Huang ◽  
Wenchao Xiao ◽  
Baoyu Wang
Keyword(s):  
Aluminum Alloy ◽  
High Temperature ◽  
Damage Evolution ◽  
7075 Aluminum Alloy ◽  
Temperature Conditions

Study on the damage evolution of torsional fretting fatigue in a 7075 aluminum alloy

Wear ◽  
2018 ◽  
Vol 402-403 ◽  
pp. 160-168 ◽  
Author(s):  
Jinfang Peng ◽  
Xiao Jin ◽  
Zhibiao Xu ◽  
Jun Zhang ◽  
Zhenbing Cai ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Damage Evolution ◽  
Fretting Fatigue ◽  
7075 Aluminum Alloy ◽  
Torsional Fretting

scholarly journals A New Infrared Heat Treatment on Hot Forging 7075 Aluminum Alloy: Microstructure and Mechanical Properties

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1177 ◽  
Author(s):  
Yi-Ling Chang ◽  
Fei-Yi Hung ◽  
Truan-Sheng Lui
Keyword(s):  
Heat Treatment ◽  
Aluminum Alloy ◽  
High Temperature ◽  
Material Property ◽  
Rapid Heating ◽  
Hot Forging ◽  
Target Material ◽  
Age Hardening ◽  
Experimental Result ◽  
7075 Aluminum Alloy

When hot forging 7075 aluminum alloy, as a military material durable enough for most of its applications, it needs to be heat-treated to ensure the target material property achieves the application requirements. However, the material properties change because of heat throughout usage. In this study, a new approach was devised to heat treat the alloy to prevent material property changes. The study further clarified the effect of rapid heat treatment on the high-temperature resistance of a hot forging 7075 aluminum alloy. Infrared (IR) heat treatment was used as a rapid heating technique to effectively replace the conventional resistance heat (RH) treatment method. Our experimental result showed that IR heat treatment resulted in better age hardening at the initial aging stage, where its tensile strength and elongation appeared like that of a resistance heat treatment. More so, based on hardness and tensile test results, the IR-heated treatment process inhibited the phase transformation of precipitations at a higher temperature, improving high-temperature softening resistance and enhancing the thermal stability of the hot forging 7075 aluminum alloy.

Quantification of damage evolution in a 7075 aluminum alloy using an acoustic emission technique

2011 ◽  
Vol 528 (22-23) ◽  
pp. 6708-6714 ◽  
Author(s):  
Marcos Lugo ◽  
J.B. Jordon ◽  
M.F. Horstemeyer ◽  
M.A. Tschopp ◽  
J. Harris ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Aluminum Alloy ◽  
Damage Evolution ◽  
7075 Aluminum Alloy ◽  
Acoustic Emission Technique

Hot Deformation Behavior and Fracture of As-Extruded 7075 Aluminum Alloy

2011 ◽  
Vol 291-294 ◽  
pp. 1051-1056
Author(s):  
Zhi Chao Sun ◽  
Jiang Hui Wang ◽  
Yu Wang ◽  
He Yang
Keyword(s):  
Aluminum Alloy ◽  
High Temperature ◽  
Deformation Behavior ◽  
Fracture Behavior ◽  
Fracture Criterion ◽  
Constant Strain Rate ◽  
7075 Aluminum Alloy ◽  
Damage Factor ◽  
Fracture Criteria ◽  
Forming Temperature

Based on the isothermal compression experiment under constant strain rate, the deformation behavior and flow stress of as-extruded 7075 aluminum alloy at high temperature was studied. Then the fracture behavior and mechanism of 7075 aluminum alloy were investigated, the results showed that longitudinal cracking was easy to occur at a high temperature due to additional tensile stress and low melting point alloy in grain boundaries melting. Through analysis and comparing of C&L and Oyane fracture criteria, it was proved that C&L fracture criterion was more reasonable to predict fracture in 7075 aluminum alloy hot deforming, and the critical damage factor in a forming temperature range(300~450°C) for 7075 aluminum alloy was obtained.

High Temperature Deformation Mechanism of 7075 Aluminum Alloy

2007 ◽  
Vol 353-358 ◽  
pp. 691-694 ◽  
Author(s):  
Dan Yang Zhu ◽  
Liang Zhen ◽  
Chen Lin ◽  
Wen Zhu Shao
Keyword(s):  
Aluminum Alloy ◽  
High Temperature ◽  
Tensile Test ◽  
Flow Characteristics ◽  
Orientation Angle ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Test Machine ◽  
7075 Aluminum Alloy ◽  
Continuous Dynamic Recrystallization

This paper presents the high temperature deformation behavior of 7075 aluminum alloy after T6 heat treatment by using electron tensile test machine with a temperature range of 230 - 440 °C, strain rate of 0.01 s-1, deformation of 50 % and 100 %, respectively. The morphology of the fractured surfaces, dislocation and change of sub-grains before and after the tensile test were investigated by using scanning electron microscope (SEM) and electron back scattering diffraction (EBSD) technique. The results show that the fracture mechanism of 7075 aluminum alloy was ductile rupture. The thermal deformation of the 7075 aluminum alloy showed the steady-state flow characteristics, and the flow stress decreased with the increase of deformation temperature. Orientation angle offset of the grain boundary decreased with the increasing of the deformation at 440 °C, indicating that the continuous dynamic recrystallization occurred inside the 7075 aluminum alloy.

Effect of contact pressure on torsional fretting fatigue damage evolution of a 7075 aluminum alloy

2019 ◽  
Vol 137 ◽  
pp. 1-10 ◽  
Author(s):  
Jinfang Peng ◽  
Botong Wang ◽  
Xiao Jin ◽  
Zhibiao Xu ◽  
Jianhua Liu ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Contact Pressure ◽  
Fatigue Damage ◽  
Damage Evolution ◽  
Fretting Fatigue ◽  
7075 Aluminum Alloy ◽  
Torsional Fretting
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