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Keywords: aluminum alloys
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eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2023
ISBN: 978-0-8031-7733-8
... Environmental cracking of high-strength aluminum alloys in corrosive atmospheres presents significant maintenance and safety issues for aircraft and may decrease service life. The service life of an aircraft structure is dependent on the degradation associated with the deposition of corrosive...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2017
ISBN: 978-0-8031-7639-3
... This paper presents a detailed investigation into nonproportional loading-induced multi–axial fatigue damage in a series of aluminum alloys using a recently developed moment of load path (MLP) model that contains a material sensitivity parameter. A generalized procedure is presented...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2005
ISBN-10: 0-8031-3479-7
ISBN: 978-0-8031-3479-9
... specimen was chosen that better simulated the geometry and stress state of the component of interest: an aircraft wing design detail. Thin panels of selected 7XXX and 2XXX aluminum alloys were prepared with a centrally located open-hole with a corner notch of 0.13 mm (∼0.005 in.) to serve as a crack...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2005
ISBN-10: 0-8031-3479-7
ISBN: 978-0-8031-3479-9
... Spectrum FCG data were generated with corner cracks at center holes for three contrasting spectrum types and two aluminum alloys, 2124-T851 and 7475-T7351. Existing strip-yield crack closure models for FCG analysis under spectrum loading were evaluated in comparison to conventional FCG models...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2851-7
ISBN: 978-0-8031-2851-4
... that can be used to ensure the structural integrity and safe operation of both current and future aerospace systems. fretting fatigue aging aircraft structural integrity riveted aircraft structure aircraft engines aluminum alloys titanium alloys T. N. Farris,I M. P. Szolwinski, 2 and G...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2617-4
ISBN: 978-0-8031-2617-6
... In this study, stress-life (S-N) fatigue curves are predicted for high-strength aluminum alloy 7055 for open-hole specimens at two stress ratios, R = 0.1 and 0.5, and smooth specimens at R = 0.1 using the small-crack growth model of Brockenbrough et al. [ 1,2 ] and closure-free FCG curves...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2617-4
ISBN: 978-0-8031-2617-6
...% of total life. For the probe geometry employed, the conductivity loss in the microcrack region just prior to failure was 7%; in the macrocrack region it reached 13%. Fatigue aluminum alloys magnetometers Volker Weiss, 1NeiI Goldfine, 2 and MarjorieAnn Natishan 3 Early Stage Fatigue Damage...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2624-7
ISBN: 978-0-8031-2624-4
... Effects of K max on closure-free, near-threshold fatigue crack growth are examined in ingot metallurgy aluminum alloys 2024 and 7050, and powder metallurgy aluminum alloy 8009. Significantly lower closure-free fatigue crack growth thresholds, as well as accelerated fatigue crack growth rates...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2852-5
ISBN: 978-0-8031-2852-1
... were made from precipitation hardened aluminum alloy SZAV-1 similar in composition to AA6005 alloy. To increase knowledge about the aging of the mechanically loaded components few dismantled parts of the reactor were tested or samples were cut and stored for testing. In the meantime a new aluminum...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1997
ISBN-10: 0-8031-2408-2
ISBN: 978-0-8031-2408-0
... and fatigue. New materials with improved damage tolerance attributes can improve the margin of safety in the presence of widespread damage. An excellent example of one such material is new aluminum alloy 2524 (formerly C188) which has improved fracture toughness and fatigue crack growth resistance relative...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1997
ISBN-10: 0-8031-2473-2
ISBN: 978-0-8031-2473-8
... cycles. damage mechanics fatigue (materials) crack initiation crack propagation aluminum alloys finite element analysis continuum damage mechanics cracking fracture(materials) C. L. Chow 1 and L. G. Yu2 A Unified Approach to Metal Fatigue Based on the Theory of Damage Mechanics REFERENCE...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1997
ISBN-10: 0-8031-2413-9
ISBN: 978-0-8031-2413-4
... The discipline of time-dependent fracture mechanics has traditionally focused on the creep crack growth behavior of high-temperature materials that display creep-ductile behavior, such as stainless steels and chromium-molybdenum steels. Elevated temperature aluminum alloys, however, have been...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1997
ISBN-10: 0-8031-2413-9
ISBN: 978-0-8031-2413-4
... The temperature dependence of the plane-strain initiation fracture toughness ( K JICi ) is modeled micromechanically for a variety of advanced aluminum alloys that fail by microvoid processes. Materials include precipitation-hardened ingot metallurgy, spray formed, submicron-grain-size powder...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1997
ISBN-10: 0-8031-2413-9
ISBN: 978-0-8031-2413-4
... Because of their ease of fabricability, durability, and good specific properties, precipitation-hardened aluminum alloys have been the materials of choice for subsonic aircraft for over 50 years. At the present time, precipitation-hardening alloys are being evaluated for use in elevated...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1996
ISBN-10: 0-8031-2016-8
ISBN: 978-0-8031-2016-7
... anticipated for these systems is the aluminum alloy series. To characterize this class of materials in a prototypical irradiation environment, Al5052 (Al-2.7Mg) and Al6061 (Al-1.1Mg-0.5Si) in hardened and annealed conditions were irradiated to a fluence of 4.2×10 20 neutrons/cm 2 at ~100°C in a spallation...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1996
ISBN-10: 0-8031-2016-8
ISBN: 978-0-8031-2016-7
... As part of a study to determine the potential for using aluminum alloys as structural components in accelerators used to produce tritium, tensile specimens and transmission electron microscopy (TEM) disks of two aluminum alloys in two tempers were irradiated with neutrons from spallation...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1995
ISBN-10: 0-8031-1996-8
ISBN: 978-0-8031-1996-3
... computation is used to determine the stress intensity factors as functions of axial load, torque, and crack length. fatigue fracture aluminum alloys plate theory mixed mode fracture finite element analysis geometric nonlinearity aircraft structure Mark J. Viz, 1 Alan T. Zehnder, 1 and John...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1995
ISBN-10: 0-8031-2003-6
ISBN: 978-0-8031-2003-7
... the R -curve and to decide for the next load increment the computer is going to apply. This laser technique was validated in comparison to a classical mechanical extensometer method on an aluminum alloy. This method bears fruitful applications in testing under controlled environment (temperature...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1994
ISBN-10: 0-8031-1985-2
ISBN: 978-0-8031-1985-7
... systems are given for a 2024 aluminum alloy. Crack profiles are shown for reamed and cold-worked holes. fatigue crack growth crack closure computer automation eddy currents d-c potential difference fatigue threshold small cracks crack profiles holes backface strain residual stresses cold...
eBook Chapter
Series: ASTM Select Technical Papers
Publisher: ASTM International
Published: 1993
ISBN-10: 0-8031-1861-9
ISBN: 978-0-8031-1861-4
... Experimental evidence collected by the authors shows that the growth of pits on aluminum alloys and Al-based metal matrix composites can be monitored by EIS. Characteristic changes occur in the impedance spectra when pits have exceeded a certain minimum depth. The phase angle is especially...