Mechanical properties and microstructure evolution of aluminum alloy tubes with normal gradient grains under biaxial stress

2022 ◽  
Author(s):  
Yang Cai ◽  
Xiaosong Wang
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Microstructure Evolution ◽  
Biaxial Stress

Effect of Rotary Forging on Microstructure Evolution and Mechanical Properties of Aluminum Alloy/Copper Bimetallic Material

2021 ◽  
Author(s):  
S. O. Rogachev ◽  
V. A. Andreev ◽  
V. S. Yusupov ◽  
S. A. Bondareva ◽  
V. M. Khatkevich ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Microstructure Evolution ◽  
Rotary Forging ◽  
Bimetallic Material

scholarly journals Effects of Ce-Rich Mischmetal on Microstructure Evolution and Mechanical Properties of 5182 Aluminum Alloy

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4230
Author(s):  
Tianhao Gong ◽  
Junhui Dong ◽  
Zhiming Shi ◽  
Xinba Yaer ◽  
Huimin Liu
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Aluminum Alloy ◽  
Cold Rolling ◽  
Microstructure Evolution ◽  
Recrystallization Annealing ◽  
Al Alloy ◽  
Cold Rolled ◽  
Particle Strengthening ◽  
Grain Refinement Strengthening

This paper addresses the effects of Ce-rich mischmetal on the microstructure evolution of a 5182 aluminum alloy during annealing and rolling processes. The Ce-rich mischmetal was added to an as-cast 5182 aluminum alloy in an induction furnace, and this was followed by homogenized annealing at 450 °C for 24 h and a rolling operation. The microstructure evolution and mechanical properties’ analysis of the 5182 Al alloy were characterized. The results show that the Ce-rich mischmetal could modify the microstructure, refine the α-Al grains, break the network distribution of Mg2Si phases, and prevent Cr and Si atoms from diffusing into the Al6(Mn, Fe) phase in the as-cast 5182 Al alloys. Ce-rich mischmetal elements were also found to refine the Al6(Mn, Fe) phase after cold rolling. Then, the refined Al6(Mn, Fe) particles inhibited the growth of recrystallization grains to refine them from 10.01 to 7.18 μm after cold rolling. Consequently, the tensile strength of the cold-rolled 5182 Al alloy increased from 414.65 to 454.34 MPa through cell-size strengthening, dislocation density strengthening, and particle strengthening. The tensile strength of the recrystallization annealed 5182 Al alloy was increased from 322.16 to 342.73 MPa through grain refinement strengthening, and this alloy was more stable after the recrystallization annealing temperature.

scholarly journals Investigation on the Effect of Type of Cooling on the Properties of Aluminum Alloy during Warm/Hot Hydromechanical Deep Drawing

Symmetry ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 362 ◽  
Author(s):  
Gaoshen Cai ◽  
Chuanyu Wu ◽  
Dongxing Zhang
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Microstructure Evolution ◽  
Deep Drawing ◽  
Water Cooling ◽  
Sheet Hydroforming ◽  
Hydromechanical Deep Drawing ◽  
Different Types ◽  
Warm Hydroforming ◽  
The Stability

The warm sheet cylindrical deep drawing experiment of aluminum alloy was carried out and macro-mechanical properties and microstructure evolution of hydro-formed cups with different cooling medium were analyzed, which aimed to investigate the effects of different types of cooling on mechanical properties and microstructure of cylindrical cups hydro-formed by warm Hydro-mechanical Deep Drawing (HDD). Results show that, under the condition of warm hydroforming, the mechanical properties such as yield stress and ultimate strength were influenced very little by air or water cooling. Grain coarsening of these hydro-formed cups can be inhibited to a certain extent with subsequent rapid water cooling. Moreover, it shows that the processing with warm sheet hydroforming and subsequent rapid cooling of 7075-O aluminum alloy has a positive significance in maintaining the stability of macro mechanical properties and inhibiting the degradation of the microstructure of materials.

scholarly journals Mechanical Properties and Microstructure Evolution of Aluminum Alloy Tubes with Normal Gradient Grain Under Biaxial Stress

2021 ◽  
Author(s):  
Yang CAI ◽  
Xiaosong Wang
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Aluminum Alloy ◽  
Biaxial Stress ◽  
Maximum Expansion ◽  
Grain Distribution ◽  
Strength And Plasticity ◽  
Hydraulic Bulging ◽  
Aluminum Alloy Tube ◽  
Size Gradient

Abstract Grain size gradient materials are a type of new structural material with the advantages of both coarse and fine grains. To study the effect of normal gradient grain on the mechanical properties and microstructure of aluminum alloy tube during hydroforming, the normal gradient grain distribution of the outer fine and inner coarse grains was obtained using spinning and annealing methods, and the biaxial stress was acquired using hydraulic bulging experiments. The thickness of the outer refined area was 105, 470, and 570 μm, respectively, where the grain size was refined to within 50 μm. Under biaxial stress, the tensile strength of the tube was 79, 89, and 106 MPa, the maximum expansion rates were 18%, 17%, and 10%, and the work-hardening indexes were 0.19, 0.20, and 0.17, respectively. The gradient grain tube with a refined thickness of 470 μm exhibited both strength and plasticity and was suitable for the hydroforming of aluminum alloy tubular parts. With increasing refined grain area, the density of the low angular grain boundary increased and make the chance of stitching dislocation increased in the process of intracranular deformation. However, the increase in the refined region weakened the deformation coordination, leading to a decrease in plasticity.

Microstructure evolution and mechanical properties of backward thixoextruded 7075 aluminum alloy

2012 ◽  
Vol 36 ◽  
pp. 557-563 ◽  
Author(s):  
M.R. Rokni ◽  
A. Zarei-Hanzaki ◽  
H.R. Abedi ◽  
N. Haghdadi
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Microstructure Evolution ◽  
7075 Aluminum Alloy
Sign in / Sign up

Export Citation Format

Share Document