Influence of chemical composition on aging property of 7204 aluminum alloy

2012 ◽  
pp. 1199-1204
Author(s):  
Tadashi Minoda ◽  
Hideo Yoshida
Keyword(s):  
Aluminum Alloy ◽  
Chemical Composition ◽  
Aging Property

The Effect of Thermal Treatment on the Microstructural Evolution of an Al-Cu Alloy

2003 ◽  
Author(s):  
Tracie L. Zoeller ◽  
Thomas H. Sanders
Keyword(s):  
Aluminum Alloy ◽  
Chemical Composition ◽  
Marked Effect ◽  
Volume Fraction ◽  
Solidification Rate ◽  
Thermal Treatments ◽  
Large Volume Fraction ◽  
Cu Alloy ◽  
Processing Step ◽  
Alloy Microstructure

Following solidification, an aluminum alloy microstructure is highly segregated. The microstructure consists of cored dendrites with various soluble and insoluble phases present in the dendritic regions. The solidification rate has a marked effect on the amount of coring that an alloy experiences. Understanding the effects of the solidification rate is important in explaining differences in microstructures. Subsequent heat treatments are performed to homogenize the microstructure. The microstructure evolution after each processing step is dependent upon the previous microstructures. The variation in local chemical composition may promote or hinder precipitation of new phases. A large volume fraction of coarse insoluble phases can lead to the occurrence of recrystallized grains via particle stimulated nucleation, while inhomogeneous solute distribution can lead to the precipitation of an uneven distribution of dispersoid phases. The effect of solidification rate and subsequent thermal treatments on the microstructure of an Al-4Cu alloy will be investigated and experimental and numerical results will be presented.

Influence of Continuous Casting Conditions on Segregation of Additions in EN AW 1350 Aluminum Alloy

2016 ◽  
Vol 682 ◽  
pp. 205-211
Author(s):  
Radosław Kowal ◽  
Tadeusz Knych ◽  
Andrzej Mamala ◽  
Paweł Kwaśniewski ◽  
Wojciech Ściężor ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Chemical Composition ◽  
Continuous Casting ◽  
Production Process ◽  
Casting Speed ◽  
Casting Process ◽  
Point Of View ◽  
Crystallization Zone ◽  
Spectroscopy Studies

Integrated continuous casting processes are an important element of the production process in modern industry. Requirements for quality and exploitation properties of products obtained using continuous casting processes necessitate a revision of the role of impurities distribution in the material. This paper concerns on the influence of the casting process on the distribution of alloy additions. Spectroscopy studies were performed for the most sensitive elements, from the segregation, (i.e. : iron and silicon) point of view. Next obtained research results were correlated with the parameters of chemical composition such as casting speed, the presence of a modifier and the processing of metal crystallization zone. Analysis of the results clearly shows the presence of iron and silicon normal macrosegregation. It was observed that the concentration of these elements is highest in the casting axis and, in the case of iron, is 50% higher in the axis than in the circumference of casts.

Friction of Thin Electroless NiP and NiP-SiO2 Coatings on Aluminium Alloy Substrate

2012 ◽  
Vol 527 ◽  
pp. 92-97 ◽  
Author(s):  
Nikolai K. Myshkin ◽  
Andrei Ya. Grigoriev ◽  
Dzmitry M. Gutsev
Keyword(s):  
Aluminum Alloy ◽  
Chemical Composition ◽  
Friction Coefficient ◽  
Aluminium Alloy ◽  
Tribological Properties ◽  
Contact Geometry ◽  
Secondary Structures ◽  
Dry Sliding ◽  
Tribochemical Processes ◽  
Friction Surfaces

Thin NiP and NiP+SiO2 coatings were deposited by electroless techniques on aluminum alloy plates. Dry sliding tests against Al2O3 counterbody with the ball on plate contact geometry and reciprocal moving were carried out. The results of tribological tests showed that the friction coefficient of the modified coating at loads above 500 mN by 3-4 times, and wear 1.4-2 times lower than for original NiP coatings. It was found that during friction of NiP and NiP+SiO2 coatings different tribochemical processes are realized. These processes lead to the formation of different by chemical composition of P, Ni and O of secondary structures on the friction surfaces and as result to different tribological properties of the investigated coatings.

scholarly journals STUDY OF THE INFLUENCE OF DISPERSITY AND CHEMICAL COMPOSITION OF NICKEL RENEUAL ALLOYS ON THE SPECIFICITY OF REDUCTION OF ADAMANTANE-CONTAINING UNSATURED NITRILE

2021 ◽  
pp. 64-70
Author(s):  
I. A. Novakov ◽  
B. S. Orlinson ◽  
E. N. Saveliev ◽  
E. A. Alykova ◽  
A. M. Pichugin ◽  
...  
Keyword(s):  
Grain Size ◽  
Aluminum Alloy ◽  
Double Bond ◽  
Chemical Composition ◽  
Size Composition ◽  
Nitrile Group ◽  
Hydroxyl Group ◽  
Nickel Aluminum ◽  
Simultaneous Reduction ◽  
Unsaturated Nitrile

The regularities of the reduction of adamantane-containing unsaturated nitrile-nickel-aluminum alloy are investigated. It has been shown that under the conditions of synthesis it is possible to carry out the simultaneous reduction of both the double bond and the nitrile group. It was found that the reduction of nitriles containing 1 hydroxyl group in the position leads to a significant decrease in the rate of the process. The effect of the grain size composition of the alloy and damping additives on the reduction of unsaturated nitriles has been studied.

Property Evaluation of FML (Glare)

2021 ◽  
Vol 1020 ◽  
pp. 212-216
Author(s):  
Sunil Bhat ◽  
H. Adarsha ◽  
V. Ravinarayan ◽  
V.P. Kaushik
Keyword(s):  
Mechanical Properties ◽  
Residual Stress ◽  
Aluminum Alloy ◽  
Chemical Composition ◽  
Glass Fiber ◽  
Adhesively Bonded ◽  
Property Evaluation ◽  
Fiber Metal Laminate ◽  
Fabrication Procedure ◽  
Fiber Metal

Fiber metal laminate (Glare) made of 2014-T6 aerospace aluminum alloy sheets adhesively bonded with E-glass fiber based composite prepregs is investigated in the paper. The fabrication procedure of the laminate is explained. Chemical composition, macrostructure and residual stress of aluminum alloy are obtained. Mechanical properties of the laminate viz. tensile, flexural and shear strengths are measured.

Microstructure and Hemming Properties of AA6016 Aluminum Alloy Sheets

2011 ◽  
Vol 465 ◽  
pp. 451-454 ◽  
Author(s):  
Aleksandar Davidkov ◽  
Roumen H. Petrov ◽  
Vitaliy Bliznuk ◽  
Petar Ratchev ◽  
Peter De Smet ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Chemical Composition ◽  
Aging Time ◽  
Automotive Industry ◽  
Weight Reduction ◽  
Natural Aging ◽  
Common Environment ◽  
Environment Friendly ◽  
Laboratory Conditions ◽  
Aluminum Sheets

The use of Al-Mg-Si-(Cu) heat treatable 6xxx alloys is steadily increasing in the automotive industry. The possibility of weight reduction of the cars in combination with the good formability and high in-service dent resistance of these alloys, make them a favorable material for body panel applications. One of the most common, environment-friendly and easy to perform processes used to join aluminum sheets, is the hemming joining operation. This operation heavily relies on the bendability of the sheets, because they are bent to an angle of 180° over of a radius equal to their thickness. Tearing or cracking of the outer bent surface are often very common. In this study we attempt to understand the relations between the microstructural features of the sheets and their hemming behavior. The hemming experiments are performed in laboratory conditions and the results are discussed together with the data obtained from crystallographic, microstructural and textural investigations. Relations between the hemming appearance, chemical composition, natural aging time and dispersoid’s density are found and discussed.

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