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aluminum alloy 7075

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006402
EISBN: 978-1-62708-217-4
... or light sanding. The panels, subsequent to profiling and machining, were required to be penetrated inspected, shotpeened. H 2 SO 4 anodized, and coated with MIL-C-27725 integral fuel tank coating on the rib side. Fig. 1 Aluminum alloy 7075-T6 aircraft wing panel (a) showing unusual surface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0046146
EISBN: 978-1-62708-217-4
...Abstract Abstract The torque-arm assembly (aluminum alloy 7075-T73) for an aircraft nose landing gear failed after 22,779 simulated flights. The part, made from an aluminum alloy 7075-T73 forging, had an expected life of 100,000 simulated flights. Initial study of the fracture surfaces...
Image
Published: 30 August 2021
Fig. 2 (a) Cracked HL 22-8 aluminum alloy 7075-T6 fasteners. (b) Typical cracked fastener head. (c) Typical head cracks produced by installing fasteners in misaligned holes during testing More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0047199
EISBN: 978-1-62708-234-1
...Abstract Abstract The lower receiver of the M16 rifle is an anodized forging of aluminum alloy 7075-T6. Degradation of the receivers was observed after three years of service in a hot, humid atmosphere. The affected areas were those in frequent contact with the user's hands...
Image
Published: 30 August 2021
Fig. 28 Effect of burning on ductility in a 7075 aluminum alloy. (a) Properly heated. (b) Embrittled due to liquid phases formed in grain boundary. Profile of fracture surface of tensile specimens pulled to failure More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006387
EISBN: 978-1-62708-217-4
...Abstract Abstract A routine examination on a seat ejection system found that the catapult attachment swivel fabricated from 7075-T651 aluminum alloy plate contained cracks on opposite sides of the part. This swivel, or bath tub, does not experience extreme loads prior to activation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091674
EISBN: 978-1-62708-217-4
... inspecting all hinge brackets in service for cracks and for proper maintenance of paint. Also suggested was replacing the aluminum alloy 2015-T6 with alloy 7075-T6, and surface treatment for the 7075-T6 brackets was recommended using sulfuric acid anodizing and dichromate sealing. Finally, it was also...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006413
EISBN: 978-1-62708-217-4
...Abstract Abstract Examination of a 7075-T6 aluminum alloy pylon strut revealed cracks in two locations on the ears of the strut. Because the part was still intact, the cracks had to be forced open so that the fractures could be examined. Scanning electron microscopy (SEM) of the opened cracks...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091809
EISBN: 978-1-62708-217-4
... on the jet fuel. Pitting attack occurred under microbial deposits on the metal surface in the water phase or at the water-fuel interface. Previously, exposure of aluminum 7075 to cultures of various isolates showed that 27 bacterial isolates and 3 fungi could seriously corrode the aluminum alloy over several...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001541
EISBN: 978-1-62708-235-8
...Abstract Abstract A forging of 7075-T6 aluminum alloy, which formed a support for the cylinder of a cargo door, cracked at an attachment hole. Fluorescent penetrant inspection showed the crack ran above and below the hole out onto the machined flat surface of the flange. A 6500x electron...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001600
EISBN: 978-1-62708-217-4
...Abstract Abstract This paper summarizes the results of a failure analysis investigation of a fractured main support bridge made of 7075 aluminum alloy from an army helicopter. The part, manufactured by “Contractor IT,” failed component fatigue testing while those of the original equipment...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001298
EISBN: 978-1-62708-215-0
...Abstract Abstract A helicopter tail rotor blade spar failed in fatigue, allowing the outer section of the blade to separate in flight. The 7075-T7351 aluminum alloy blade had fiberglass pockets. The blade spar was a hollow “D” shape, and corrosion pits were present on the inner surface...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001366
EISBN: 978-1-62708-215-0
...Abstract Abstract An AMS 4126 (7075-T6) aluminum alloy impeller from a radial inflow turbine fractured during commissioning. Initial examination showed that two adjacent vanes had fractured through airfoils in the vicinity of the vane leading edges, and one vane fractured through an airfoil...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001727
EISBN: 978-1-62708-225-9
.... The significant observation was that the failure of the bolt was located in the vicinity of a 7075-T6 aluminum alloy flange which corroded — evidenced by white, chalky corrosion products. Rust spots (pits) were observed along the shank about 1 2 in. from the head. At this point, the bolt emerges from...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001020
EISBN: 978-1-62708-214-3
... is comparable to the hardness of 7075 aluminum in the T6 (artificially aged) condition (7075 alloy composition: 5.6% Zn, 2.5% Mg, 1.6% Cu, 0.23% Cr, with the balance essentially aluminum). Discussion Results of electrical conductivity determinations showed the strut alloy to have a conductivity of 31.3...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001510
EISBN: 978-1-62708-217-4
..., Marine Corps and Bell Helicopter are working to implement a non-destructive, ultrasonic procedure to inspect for stress corrosion cracks on all UH-1 helicopter Main Rotor Blade Grips. Also, all future procurements of this component require manufacturing from forged 7075-T73 aluminum alloy...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003554
EISBN: 978-1-62708-180-1
.... , and Setterlund R.B. , Mercury Liquid Metal Embrittlement Causes Aluminum Plate Heat Exchanger Failure , Mater. Perform. , Vol 37 ( No.6 ), June 1998 , p 59 – 60 • Vergeldt E. , Junai A.A. , and Kolster B.H. , Liquation Cracking of High Strength Aluminum Alloy 7075 , Joining...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006786
EISBN: 978-1-62708-295-2
.... , Mercury Liquid Metal Embrittlement Causes Aluminum Plate Heat Exchanger Failure, Mater . Perform. , Vol 37 ( No. 6 ), June 1998 , p 59 – 60 • Vergeldt E. , Junai A.A. , and Kolster B.H. , Liquation Cracking of High Strength Aluminum Alloy 7075 , Joining/Welding 2000...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001812
EISBN: 978-1-62708-180-1
... Titanium None Excellent (d) Excellent (c) Excellent (c) Good or not recommended (f) Asp fasteners Alloy steel Cadmium/nickel Good (g) Excellent Excellent Excellent Pull-type lockbolts 7075 Aluminum Anodized Not recommended Excellent Excellent Not recommended (a) Blind...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006805
EISBN: 978-1-62708-329-4
... combined stresses. A common manufacturing discrepancy is illustrated and discussed in this section. During an assembly operation involving HL 22-8 fasteners, the fastener heads would sometimes crack ( Fig. 2a, b ). Aluminum alloy 7075-T73 nuts were being installed on type 7075-T6 fasteners...