Press-Formability of Aluminum Alloy Sheets of Solution-Hardening Type

1983 ◽  
Vol 105 (4) ◽  
pp. 235-242 ◽  
Author(s):  
N. Kawai ◽  
T. Mori ◽  
T. Nozaki
Keyword(s):  
Aluminum Alloy ◽  
Fracture Behavior ◽  
Plastic Anisotropy ◽  
Weight Ratio ◽  
High Strength ◽  
Solution Hardening ◽  
Solution Type ◽  
Metal Sheets ◽  
The Press ◽  
Press Formability

Recently, formable metal sheets with a high strength-to-weight ratio have been developed especially to conserve energy and resources. For this purpose, two conditions are necessary: the strengthening of the sheet metal and improvement of the press-formability, which are difficult to obtain together. In the present study, the conditions necessary for this are examined using solid-solution type aluminum alloy sheets. Moreover, a new measure to assess press-formability is proposed in terms of the strain-hardening capability and plastic-anisotropy based on fracture behavior of sheet metals.

scholarly journals EXPERIENCE IN THE DEVELOPMENT AND USE OF ALUMINUM ALLOY CASING FOR CONDITIONS OF HIGH CONTENT OF ACID GASES IN FORMATION FLUIDS

2019 ◽  
Vol 121 ◽  
pp. 04013
Author(s):  
Vladimir Sledkov ◽  
Mikhail Gelfgat ◽  
Dmitry Basovich
Keyword(s):  
Aluminum Alloy ◽  
Aluminium Alloy ◽  
Weight Ratio ◽  
High Strength ◽  
Acid Gases ◽  
Construction Costs ◽  
Corrosion Resistant

When selecting a casing material for fields with a high content of H2S and CO2, it is recommended to use specialized corrosion-resistant tubulars with high content of chrome of the Sanicro 29 type. The high cost of the material can be critical for the project economy. A promising approach for these problems elimination could be the application of aluminium alloy casing pipes. They are remain inert to corrosion even if the formation environment is fully saturated with H2S and/or CO2. They are also lightweight, have high strength-to-weight ratio, and thus decrease the existing tensions in the string and reduce well construction costs.

Residual Stresses due to Deep-Drawing of Pre-Coated Aluminum-Alloy Sheets

2005 ◽  
Vol 490-491 ◽  
pp. 358-363 ◽  
Author(s):  
Masatoshi Sudo ◽  
Tomohiko Iwase ◽  
Yoshiyuki Hattori ◽  
Madoka Nakajima
Keyword(s):  
Residual Stress ◽  
Aluminum Alloy ◽  
Residual Stresses ◽  
Sheet Metal ◽  
Direct Contact ◽  
Volatile Oil ◽  
The Press ◽  
The Face ◽  
Coated Layer ◽  
Press Formability

In this study, we examined how the press formability of A1 alloys sheets and the generation of residual stresses was influenced by pre-coating resins, lubricants, die shoulder radius, the punch shoulder radius, and so on. The use of a pre-coated layer offers advantages by preventing direct contact between sheet metal and the face of the die, and also by enabling the use of volatile oil lubricants that keep the factory environment cleaner. The circumferential residual stress (σC ) of a cup becomes lower when the lubricant is less effective, and when the die shoulder radius is smaller.

scholarly journals Application of a GTN Damage Model Predicting the Fracture of 5052-O Aluminum Alloy High-Speed Electromagnetic Impaction

Metals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 761 ◽  
Author(s):  
Fei Feng ◽  
Jianjun Li ◽  
Peng Yuan ◽  
Qixian Zhang ◽  
Pan Huang ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
High Speed ◽  
Fracture Behavior ◽  
Volume Fraction ◽  
Damage Model ◽  
Weight Ratio ◽  
Model Parameters ◽  
Highly Nonlinear ◽  
Gtn Damage Model ◽  
Increasing Demand

An increasing demand exists within the automotive industry to utilize aluminum alloy sheets because of their excellent strength-weight ratio and low emissions, which can improve fuel economy and reduce environmental pollution. High-speed automobile impactions are complicated and highly nonlinear deformation processes. Thus, in this paper, a Gurson-Tvergaard-Needleman (GTN) damage model is used to describe the damage behavior of high-speed electromagnetic impaction to predict the fracture behavior of 5052-O aluminum alloy under high-speed impaction. The parameters of the GTN damage model are obtained based on high-speed electromagnetic forming experiments via scanning electron microscopy. The high-speed electromagnetic impaction behavior process is analyzed according to the obtained GTN model parameters. The shape of the high-speed electromagnetic impaction in the numerical simulations agrees with the experimental results. The analysis of the plastic strain and void volume fraction distributions are analyzed during the process of high-speed impact, which indicates the validity of using the GTN damage model to describe or predict the fracture behavior of high-speed electromagnetic impaction.

Effect of Quenching Media and Ageing Time on Al6061-Beryl Composites

2011 ◽  
Vol 110-116 ◽  
pp. 1374-1379 ◽  
Author(s):  
H.N. Reddappa ◽  
H.B. Niranjan ◽  
K.R. Suresh ◽  
Kestur Gundappa Satyanarayana
Keyword(s):  
Heat Treatment ◽  
Aluminum Alloy ◽  
Base Alloy ◽  
Ageing Time ◽  
Liquid Aluminum ◽  
Weight Ratio ◽  
High Strength ◽  
Artificial Ageing ◽  
Wear Properties ◽  
Quenching Media

— Aluminum alloy based metal matrix composites are becoming very popular because of their outstanding properties such as high strength to weight ratio, excellent mechanical properties and improved wear properties. From literature survey it was observed that very limited report available on Aluminum alloy-beryl composites, particularly on the effect of beryl content, quenching media and heat treatment on the mechanical and wear properties of Aluminum-beryl composites. Accordingly, the aims of the present study are (i) preparation of Al6061-beryl particles by liquid metallurgy method (stir cast) with possible standardization of the beryl addition to liquid Aluminum alloy, (ii) Study the effect of different quenching media and the beryl content (2-12 wt. %) on the mechanical and wear properties of these composites in both as cast and heat treated conditions. Heat treatment procedure of solutionising at temperature of 5300C for 1hour and quenching in different media (air, water and ice) followed by natural and artificial ageing for different times was adopted. It was observed that the addition of beryl particles to Al6061 alloy improves its hardness, tensile strength and wear resistance with increasing beryl content while the heat treatment had significantly improved these properties compared to that of base alloy and as cast composites.

Fractography Analysis on the Fracture Behavior of High Strength Aluminum Alloy

2011 ◽  
Vol 399-401 ◽  
pp. 46-49
Author(s):  
Hai Gen Jian ◽  
Xing Er Xie ◽  
Feng Jiang ◽  
Jin Long Li
Keyword(s):  
Aluminum Alloy ◽  
Fracture Behavior ◽  
Fracture Behaviour ◽  
High Strength ◽  
Mixed Mode Fracture ◽  
Second Phase ◽  
High Strength Aluminum Alloy ◽  
Fracture Region ◽  
Second Phase Particles ◽  
Static Fracture

Observation of fratcure morphology and energy spectrum analysis of fracture toughness specimens of high strength aluminum alloy was carried out on scanning electron microscope (SEM), and the fracture behaviour of this alloy has also been studied. It is revealed that the fracture surface can be divided into 3 regions: precrack region, propagation region and rapid fracture region, the appearance of which is similar to that of cleavage fracture, mixed mode fracture and static fracture, respectively. The fracture of high strength aluminum alloy is primarily influenced by coarsed Fe-rich particles which is relatively brittle, and the major fracture mode of this kind of alloy is toughness fracture casued by coarsed second phase particles.

Localized Corrosion Resistance of Dissimilar Aluminum Alloys Joined by Friction Stir Welding (FSW)

2016 ◽  
Vol 710 ◽  
pp. 41-46 ◽  
Author(s):  
Aline F.S. Bugarin ◽  
Fernanda Martins Queiroz ◽  
Maysa Terada ◽  
Hercílio G. De Melo ◽  
Isolda Costa
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Aluminum Alloys ◽  
Weight Ratio ◽  
Base Material ◽  
High Strength ◽  
Localized Corrosion ◽  
Friction Stir ◽  
Dissimilar Aluminum Alloys

2XXX and 7XXX high strength aluminum alloys are the most used materials for structural parts of aircrafts due to their high strength/weight ratio. Their joining procedure is an engineering challenge since they present low weldability. Friction Stir Welding (FSW) is a joining technology developed in the early 90 ́s. It is a solid-state welding process, without the use of fillers or gas shield, that eliminates conventional welding defects and has been considered of great interest for application in the aircraft industry. FSW of aluminum alloys results in four regions of different microstructures, specifically: the base material (BM), the heat affected zone (HAZ), the thermo-mechanically affected zone (TMAZ), and the nugget zone (NZ). The complex microstructure of the weld region leads to higher susceptibility to localized corrosion as compared to the BM even when similar alloys are joined. The welding of dissimilar alloys in its turn results in even more complex microstructures as materials with intrinsically different composition, microstructures and electrochemical properties are put in close contact. Despite the great interest in FSW, up to now, only few corrosion studies have been carried out for characterization of the corrosion resistance of dissimilar Al alloys welded by FSW. The aim of this study is to investigate the corrosion behavior of aluminum alloy 2024-T3 (AA2024-T3) welded to aluminum alloy 7475-T761 (AA7475-T761) by FSW. The evaluation was performed in 0.01 mol.L-1 by means of open circuit potential measurements, polarization techniques and surface observation after corrosion tests.

Application and Research Progress of Aluminum Alloy Bridge Decks

2012 ◽  
Vol 517 ◽  
pp. 763-770
Author(s):  
Yang Zhang ◽  
Jun Feng Qiu ◽  
Hei Bai
Keyword(s):  
Aluminum Alloy ◽  
Bridge Decks ◽  
Weight Ratio ◽  
High Strength ◽  
Cost Effective ◽  
Dynamic Responses ◽  
Research Progress ◽  
Fatigue Properties ◽  
Typical Application ◽  
Bridge Structures

In order to increase live-load carrying capacity and life of bridges, aluminum alloy bridge decks have been widely used in bridge structures for more than 70 years because of the features of high strength-to-weight ratio, excellent corrosion resistance, ease of fabrication and recovery, rapid construction, maintenance-free and cost effective. First, this paper provides in detail the advantages of aluminum alloy bridge decks and the main areas of aluminum alloy applications in bridges can also be pointed out. Then, a brief overview of typical application examples and structural shapes of aluminum alloy bridge decks are introduced. At the same time, a state-of-the-art review on the researches of aluminum alloy bridge decks, related to static behaviors, fatigue properties, dynamic responses, structural systems and cost effective, is presented. Finally, the perspectives of research and development on aluminum alloy bridge decks are discussed.

Governance of Various Tool Rotational Speeds on Mechanical Properties of Friction Stir Welded AA 7075-T651

2016 ◽  
Vol 852 ◽  
pp. 344-348
Author(s):  
R. Mohammed Ryan ◽  
E. Sangeeth Kumar
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Aluminum Alloy ◽  
Aerospace Industry ◽  
Weight Ratio ◽  
Welding Process ◽  
High Strength ◽  
Micro Hardness ◽  
Friction Stir ◽  
Aa 7075

The development of the friction stir welding being a solid state welding has provided an improved way of manufacturing aluminum joints in a quicker and reliable manner. The heat treatable aluminum alloy AA7075 is used substantially in the aerospace industry because of its high strength to weight ratio and good ductility. The objective of our work is to research the parameters of welding on the mechanical properties of friction stir welded joints of AA7075-T651. The parameters namely rotational speeds (500 rpm, 700 rpm, 900 rpm, 1100 rpm, 1300 rpm and 1500 rpm) were thought-about and table transverse speed of 50 mm/min, axial force of 8 KN is constrained throughout the welding process. The result of these parameters on weld quality is analyzed by its mechanical properties namely micro hardness and tensile strength.

Mechanical Properties and Plastic Anisotropy of the Quenchenable High Strength Steel 22MnB5 at Elevated Temperatures

2007 ◽  
Vol 344 ◽  
pp. 79-86 ◽  
Author(s):  
Marion Merklein ◽  
Jürgen Lecher ◽  
Vera Gödel ◽  
Stefania Bruschi ◽  
Andrea Ghiotti ◽  
...  
Keyword(s):  
Elevated Temperatures ◽  
Hot Stamping ◽  
Plastic Anisotropy ◽  
High Strength ◽  
Tensile Tests ◽  
Inductive Heating ◽  
Processing Conditions ◽  
The Press ◽  
The University

Within the scope of this paper, the formability of the press hardenable steel 22MnB5 will be investigated with regard to its anisotropic properties at elevated temperatures under the processing conditions of hot stamping. Two different experimental setups have been realized, one at the University of Erlangen-Nuremberg using conductive heating, and the other one at the University of Padova using inductive heating. Both of these equipments enable the characterization of the material anisotropy behavior by performing uniaxial, hot tensile tests in the range of hot stamping temperatures.

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