Cracking of AFNOR 7020 Aluminum Alloy Adaptor Used for Aerospace Applications: A Metallurgical Investigation

2009 ◽  
Vol 9 (5) ◽  
pp. 414-419 ◽  
Author(s):  
Abhay K. Jha ◽  
G. Naga Sirisha ◽  
P. Ramesh Narayanan ◽  
K. Sreekumar
Keyword(s):  
Aluminum Alloy ◽  
Metallurgical Investigation ◽  
Aerospace Applications

ALCOA ALUMINUM ALLOY 7050

Alloy Digest ◽  
1990 ◽  
Vol 39 (1) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
High Temperature ◽  
Magnesium Alloy ◽  
Stress Corrosion Cracking ◽  
Heat Treating ◽  
Thin Sections ◽  
Aerospace Applications ◽  
Temperature Performance ◽  
Aluminum Company

Abstract ALCOA ALUMINUM ALLOY 7050 is an aluminum-zinc-copper-magnesium alloy with a superior combination of strength, stress-corrosion cracking resistance and toughness, particularly in thick sections. In thin sections it also possesses an excellent combination of properties that are important for aerospace applications. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, and joining. Filing Code: Al-233. Producer or source: Aluminum Company of America. Originally published as Aluminum 7050, January 1979, revised January 1990.

scholarly journals Evaluation of Sc-Bearing Aluminum Alloy C557 for Aerospace Applications

2002 ◽  
Vol 396-402 ◽  
pp. 839-844 ◽  
Author(s):  
Marcia S. Domack ◽  
D.L. Dicus
Keyword(s):  
Aluminum Alloy ◽  
Aerospace Applications

Study of the Mechanical Properties of Nanostructured Aluminum Obtained by SMAT

2007 ◽  
Author(s):  
H. L. Chan ◽  
J. Lu ◽  
A. Schoberth
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Yield Strength ◽  
Surface Mechanical Attrition Treatment ◽  
Experimental Setup ◽  
Aerospace Applications ◽  
Average Hardness ◽  
Mechanical Attrition ◽  
Nanostructured Layer ◽  
Bulk Part

Enhanced mechanical properties were found on an Aluminum alloy treated by Surface Mechanical Attrition Treatment (SMAT) in this work. The average hardness of the annealed Aluminum alloy at the surface was enhanced up to 43% and reached 170 HV, and that of the bulk part could also be improved up to 20% which is 140 HV. The yield strength obtained under tensile test had significant improvement which may achieve up to 400 MPa. In this study, it is discovered that the surface nanostructured layer obtained by SMAT can be as thick as 100 μm and its effect can be observable along a specimen of 2 mm thickness. In the paper, more detailed experimental results will be presented as well as the experimental setup. The present study demonstrates the potential of the process for obtaining good strength on Aluminum alloy for aerospace applications.

scholarly journals Effects of Exposure Temperature on Tensile and Charpy Impact Properties of the 7xxx Aluminum Alloy for Aerospace Applications

2019 ◽  
Vol 57 (4) ◽  
pp. 214-226 ◽  
Author(s):  
Woojin An ◽  
Dohee Kim ◽  
Bong-Hwan Kim ◽  
Shae Kwang Kim ◽  
Sangshik Kim ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Charpy Impact ◽  
Impact Properties ◽  
Aerospace Applications ◽  
Exposure Temperature

Techniques for Transmission Electron Microscopy of Fiber-Matrix Interfaces in Aluminum Alloy-Boron Composites by Ion Erosio

1971 ◽  
Vol 29 ◽  
pp. 204-205
Author(s):  
G. G. Shaw
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Aluminum Alloy ◽  
Electron Beam ◽  
Pure Aluminum ◽  
Ion Milling ◽  
Transmission Electron ◽  
Fiber Matrix ◽  
Ion Erosion ◽  
Row Of Fibers

The morphology and composition of the fiber-matrix interface can best be studied by transmission electron microscopy and electron diffraction. For some composites satisfactory samples can be prepared by electropolishing. For others such as aluminum alloy-boron composites ion erosion is necessary.When one wishes to examine a specimen with the electron beam perpendicular to the fiber, preparation is as follows: A 1/8 in. disk is cut from the sample with a cylindrical tool by spark machining. Thin slices, 5 mils thick, containing one row of fibers, are then, spark-machined from the disk. After spark machining, the slice is carefully polished with diamond paste until the row of fibers is exposed on each side, as shown in Figure 1.In the case where examination is desired with the electron beam parallel to the fiber, preparation is as follows: Experimental composites are usually 50 mils or less in thickness so an auxiliary holder is necessary during ion milling and for easy transfer to the electron microscope. This holder is pure aluminum sheet, 3 mils thick.

Physical, Chemical, and Crystallographic Characterization of Anodic Coatings on High Strength Aluminum Base Alloys

1976 ◽  
Vol 34 ◽  
pp. 636-637
Author(s):  
R. E. Herfert ◽  
N. T. McDevitt
Keyword(s):  
Sulfuric Acid ◽  
Salt Spray ◽  
High Strength ◽  
Environmental Stability ◽  
Anodic Films ◽  
Sodium Dichromate ◽  
Corrosion Resistant ◽  
Aerospace Applications ◽  
Bond Strengths ◽  
Adhesive Bonded Joints

Durability of adhesive bonded joints in moisture and salt spray environments is essential to USAF aircraft. Structural bonding technology for aerospace applications has depended for many years on the preparation of aluminum surfaces by a sulfuric acid/sodium dichromate (FPL etch) treatment. Recently, specific thin film anodizing techniques, phosphoric acid, and chromic acid anodizing have been developed which not only provide good initial bond strengths but vastly improved environmental durability. These thin anodic films are in contrast to the commonly used thick anodic films such as the sulfuric acid or "hard" sulfuric acid anodic films which are highly corrosion resistant in themselves, but which do not provide good initial bond strengths, particularly in low temperature peel.The objective of this study was to determine the characteristics of anodic films on aluminum alloys that make them corrosion resistant. The chemical composition, physical morphology and structure, and mechanical properties of the thin oxide films were to be defined and correlated with the environmental stability of these surfaces in humidity and salt spray. It is anticipated that anodic film characteristics and corrosion resistance will vary with the anodizing processing conditions.

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