Structure, mechanical properties, and stress corrosion behaviour of high strength spray deposited 7000 series aluminium alloy

1991 ◽  
Vol 7 (5) ◽  
pp. 447-451 ◽  
Author(s):  
R. Mächler ◽  
P. J. Uggowitzer ◽  
C. Solenthaler ◽  
R. M. Pedrazzoli ◽  
M. O. Speidel
Keyword(s):  
Mechanical Properties ◽  
Aluminium Alloy ◽  
Stress Corrosion ◽  
Corrosion Behaviour ◽  
High Strength

Thermo-Mechanical Treated High Strength AA-7xxx Aluminium Alloy by Cold and Cryo-Rolling Study their Mechanical Properties Corrosion and Microstructure Correlation

2019 ◽  
Vol 969 ◽  
pp. 62-67
Author(s):  
Y. Phaneendra ◽  
I.N. Niranjan Kumar ◽  
V.V. Ravi Kumar
Keyword(s):  
Mechanical Properties ◽  
Aluminium Alloy ◽  
Corrosion Behaviour ◽  
High Strength ◽  
Phase Changes ◽  
Fine Grained ◽  
Fine Grained Structure ◽  
Cold Rolled ◽  
Temperature Liquid ◽  
7Xxx Alloy

Thermo-mechanical treatment, in particular, cryo-rolling is a unique technique to produce super high strength AA-7xxx aluminium alloys with ultra-fine grained structure. In order to conduct the rolling at room temperature and cryo-temperature (liquid N2 (-190°C)), the AA-7xxx alloy ingot was rolled from 6mm to 1mm with 85% reduction in thickness. Optical microscopy, XRD, electron microscopy, hardness and tensile testing were conducted on the rolled alloy for understanding the phase changes and evaluating the mechanical properties. The alloy rolled at liquid nitrogen (LN2) exhibits very high strength with reasonable ductility. Corrosion behaviour of AA-7xxx series aluminium alloy various conditions in NaCl (3.5%) solution were investigated. Cold rolled and cryo rolled alloy exhibits better corrosion resistance than that of cast.

scholarly journals Effect of Microstructure and Texture on Mechanical Properties of Resistance Spot Welded High Strength Steel 22MnB5 and 5A06 Aluminium Alloy

Metals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 685
Author(s):  
Xiaoqing Jiang ◽  
Shujun Chen ◽  
Jinlong Gong ◽  
Zhenyang Lu
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Aluminium Alloy ◽  
High Strength Steel ◽  
High Strength ◽  
Welding Parameters ◽  
Tensile Shear Strength ◽  
Tensile Shear ◽  
Resistance Spot ◽  
Effect Of Microstructure

The present study aims to investigate the effect of microstructure and texture on mechanical properties of resistance spot welding of high strength steel 22MnB5 and 5A06 aluminium alloy as a function of welding parameters. The pseudo-nugget zones (NZs) at the steel side have undergone full recrystallisation with a fine-grained ferrite structure containing a small amount of retained austenite and a high hardness of approximately 500 HV, which is a 35% increase in hardness compared to the base material (BM) with fine lath martensitic structure. The NZs at the Al side contain both a recrystallisation texture and shear texture. Higher tensile shear strength with increasing weld time could be linked to the random texture at the Al side. The highest tensile shear strength was achieved at an intermetallic layer thickness of 4 mm.

Effect of FSP on Strength and Fracture Toughness of Aluminium Alloy 7000

2018 ◽  
Vol 877 ◽  
pp. 20-25
Author(s):  
P.K. Mandal
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Aluminium Alloy ◽  
Axial Force ◽  
Weight Ratio ◽  
High Strength ◽  
Hardness Measurement ◽  
Traverse Speed ◽  
Age Hardening ◽  
Friction Stir

The cast Al-Zn-Mg 7000 alloy has become one of the most potential structural materials in many engineering fields such as aircraft body, automotive casting due to their high strength to weight ratio, strong age hardening ability, competitive weight savings, attractive mechanical properties and improvement of thermal properties. The cast aluminium alloy has been modified of surface layer through a solid-state technique is called friction stir process (FSP). But basic principle has been followed by friction stir welding (FSW). This process can be used to locally refine microstructures and eliminate casting defects in selected locations, where mechanical properties improvements can enhance component performance and service life. However, some specified process parameters have adopted during experimental works. Those parameters are tool rotation speed (720 rpm), plate traverse speed (80 mm/min), axial force (15 kN), and tool design (i.e., pin height 3.5 mm and pin diameter 3.0 mm), respectively. The main mechanism behind this process likely to axial force and frictional force acting between the tool shoulder and workpiece results in intense heat generation and plastically soften the process material. The specified ratio of rotational speed (720 rpm) to traverse speed (80 mm/min) is considered 9 as low heat input during FSP and its entails low Zn vaporization problem results as higher fracture toughness of aluminium alloy. It is well known that the stirred zone (SZ) consists of refine equiaxed grains produced due to dynamic recrystallization. FSP has been proven to innovatively enhancing of various properties such as formability, hardness and fracture toughness (32.60 MPa√m). The hardness and fracture toughness of double passes AC+FSP aluminium alloy had been investigated by performing Vicker’s hardness measurement and fracture toughness (KIC)(ASTM E-399 standard) tests. Detailed observations with optical microscopy, Vicker’s hardness measurement, SEM, TEM, and DTA analysis have conducted to analyse microstructure and fracture surfaces of double passes FSP aluminium alloy.

Microstructural study of a high-strength stress-corrosion resistant 7075 aluminium alloy

1982 ◽  
Vol 17 (10) ◽  
pp. 2817-2824 ◽  
Author(s):  
K. Rajan ◽  
W. Wallace ◽  
J. C. Beddoes
Keyword(s):  
Aluminium Alloy ◽  
Stress Corrosion ◽  
High Strength ◽  
Corrosion Resistant ◽  
Microstructural Study

scholarly journals 10.37: Mechanical properties of high strength aluminium alloy at elevated temperatures

ce/papers ◽  
2017 ◽  
Vol 1 (2-3) ◽  
pp. 2831-2839 ◽  
Author(s):  
Mei-Ni Su ◽  
Ben Young
Keyword(s):  
Mechanical Properties ◽  
Aluminium Alloy ◽  
Elevated Temperatures ◽  
High Strength

scholarly journals Pengaruh Secondary Aging Treatment Terhadap Sifat Mekanik Dan Surface Glossiness Pada Aluminium Paduan 7003

2019 ◽  
Vol 9 (01) ◽  
pp. 55-59
Author(s):  
Ramli Ramli
Keyword(s):  
Mechanical Properties ◽  
Aluminium Alloy ◽  
High Surface ◽  
Aging Treatment ◽  
High Strength ◽  
Industrial Applications ◽  
Confocal Laser ◽  
Test Machine ◽  
Oxidation Layer ◽  
Hardness Tester

As technology advances and the quality of life improves, there is a deep need that requires of aluminium alloy that bears high strength, high toughness, high surface glossiness, anti-corrosion, and high fatigue resistivity [2]. This study aims to investigate the effects of secondary aging treatment on the mechanical properties and Surface Glossiness of the 7003 aluminium alloy by using several equipment, including: confocal laser microscope, white light interferometer, gloss meter, micro Vickers hardness tester and tensile test machine. This research was conducted by experimental method by giving treatment on the aluminium alloy 7003 with some treatments, there are: aging treatment at 100˚C for 5 hours and then secondary aging treatment at several different temperatures at 150˚C, 175˚C and 200˚C for 9 hours respectively. Based on our experimental results, it obtained: After being aged at 100 ℃ for 5 hours and then secondary aged at 175℃ for 9 hours, the 7003 aluminium alloy obtained excellent mechanical properties, which can achieve the industrial requirements of Yield strength 320 MPa and Elongation 13% for 3C mobile phone products. The 7003 aluminium alloy after being anodizing treated could obtain excellent Surface Glossiness and oxidation layer. The present aluminium alloy can achieve Surface Glossiness better than 1200 GU and the thickness of oxidation layer exceed 10μm, which were suitable for 3C industrial applications.

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