The effects of grain size on the hot deformation and processing map for 7075 aluminum alloy

2013 ◽  
Vol 51 ◽  
pp. 592-597 ◽  
Author(s):  
Yongbiao Yang ◽  
Zhimin Zhang ◽  
Xubin Li ◽  
Qiang Wang ◽  
Yanhui Zhang
2021 ◽  
Vol 1035 ◽  
pp. 102-107
Author(s):  
Shao Ming Ma ◽  
Chuan Liu Wang ◽  
Yun Lin Fan

Light-weight and high-strength aluminum alloy drill pipes are potential and promising to replace traditional steel drill pipes. In this study, the grain size and mechanical properties of aluminum alloy drilling pipe materials reinforced by in-situ TiB2 particles were studied. The results showed when reinforced by in-situ TiB2 particles the grain size of aluminum alloy materials was refined from 155 m to 57 m and ultimate tensile strength was increased from 590 MPa to 720 MPa. Besides, the results also indicated that the friction coefficient was reduced from 0.99 to 0.50 and thus the abrasion resistance of 7075 aluminum alloy was enhanced by 34 %. This study provided theoretical basis for the application of light-weight and high-strength aluminum alloy drill pipes in directional drilling and ultra-deep wells.


2015 ◽  
Vol 28 (6) ◽  
pp. 1774-1783 ◽  
Author(s):  
Lianggang Guo ◽  
Shuang Yang ◽  
He Yang ◽  
Jun Zhang

2011 ◽  
Vol 528 (3) ◽  
pp. 1548-1552 ◽  
Author(s):  
H.Z. Li ◽  
H.J. Wang ◽  
X.P. Liang ◽  
H.T. Liu ◽  
Y. Liu ◽  
...  

2017 ◽  
Vol 36 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Guo-zheng Quan ◽  
Zhen-yu Zou ◽  
Tong Wang ◽  
Bo Liu ◽  
Jun-chao Li

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.


2017 ◽  
Vol 27 (8) ◽  
pp. 1677-1688 ◽  
Author(s):  
Peng-wei LI ◽  
Hui-zhong LI ◽  
Lan HUANG ◽  
Xiao-peng LIANG ◽  
Ze-xiao ZHU

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