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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047169
EISBN: 978-1-62708-217-4
...Abstract Abstract The flange on an outboard main-wheel half (aluminum alloy 2014-T6 forging) on a commercial aircraft fractured during takeoff. The failure was discovered later during a routine enroute check. The flange section that broke away was recovered at the airfield from which the plane...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001729
EISBN: 978-1-62708-217-4
...Abstract Abstract Applying general techniques of failure analysis, the authors deduced that an in-flight explosion brought down a passenger plane. Other evidence pinpointed the location of the explosive, an important factor in establishing responsibility. Commercial planes Explosions...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047125
EISBN: 978-1-62708-217-4
...Abstract Abstract A commercial aircraft wheel half, machined from an aluminum alloy 2014 forging that had been heat treated to the T6 temper, was removed from service because a crack was discovered in the area of the grease-dam radius during a routine inspection. Neither the total number...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001587
EISBN: 978-1-62708-217-4
.... This investigation is continuing. Aircraft components Commercial planes Crashes Passenger airline materials (Other, miscellaneous, or unspecified) failure The National Transportation Safety Board simultaneously investigates major accidents in different modes of transportation at any time. The services...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048403
EISBN: 978-1-62708-226-6
... direction. A zone of heavily deformed grains at the fracture edge was revealed by longitudinal metallographic examination. The shearing fractures of a commercially pure titanium screw and a cast cobalt-chromium-molybdenum alloy were discussed for purpose of comparison. Deformation Surcigal implants...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001118
EISBN: 978-1-62708-214-3
... the minimum tolerable defect size was also recommended. Aircraft components Commercial planes Lubrication systems Springs (elastic) Wire 321 UNS S32100 Metalworking-related failures Fatigue fracture Background Two stainless steel springs in oil ring lip seals failed. Applications...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0090030
EISBN: 978-1-62708-217-4
...Abstract Abstract A DC-10 in transit from Denver to Chicago experienced failure of the center engine. The titanium compressor disk burst and severed the hydraulics of the plane. Investigation supports the conclusion that the cause of the disk rupture was the presence of a large fatigue crack...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0047165
EISBN: 978-1-62708-217-4
...Abstract Abstract Two outboard main-wheel halves (aluminum alloy 2014-T6 forged) from a commercial aircraft were removed from service because of failure. One wheel half was in service for 54 days and had made 130 landings (about 1046 roll km, or 650 roll mi) when crack indications were...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
..., cleavage across a grain on a single plane would be expected to result in smooth fracture surfaces. Such results are sometimes observed in high-purity, single-crystal specimens but are seldom seen in commercial engineering materials. Commercial engineering materials contain both a distribution of inclusions...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001833
EISBN: 978-1-62708-241-9
...Abstract Abstract The failure of a boiler operating at 540 °C and 9.4 MPa was investigated by examining material samples from the near-failure region and by thermodynamic analysis. A scanning Auger microprobe, SEM, and commercial thermodynamic software codes were used in the investigation...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
... prestrained in torsion to a shear strain of 4.3×. Source (b): Ref 3 In off-axis or bending fractures, the fracture plane is often generally perpendicular with the direction of maximum principal stress, providing information about the type and direction of loading. As the fracture progresses...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... Alternately, cleavage across a grain on a single plane would be expected to result in smooth fracture surfaces. Such results are sometimes observed in high-purity single-crystal specimens but are seldom seen in commercial engineering materials. Commercial engineering materials contain both a distribution...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003537
EISBN: 978-1-62708-180-1
... of propagation, crack propagation rate, and decreased strength level. This component failed in fatigue. Crack initiation was on a longitudinal plane visible at the top in a surface hardened region. The crack then propagated on a helical plane in torsion. Note the change in surface roughness as the crack...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001852
EISBN: 978-1-62708-241-9
... in out of plane (Y) direction only Thermal Shell-131 and Structural Shell-181 have been employed for nonlinear thermo-structural transient analysis using the ANSYS™ [ 11 ] commercial FEA code. Shell-131 is one of the ANSYS™ elements which is a 3D layered shell element having in-plane and through...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006767
EISBN: 978-1-62708-295-2
... (see the Appendix in the article “Mechanisms and Appearances of Ductile and Brittle Fracture in Metals” in this Volume). This section describes the underlying fundamentals and the relevance and necessity of performing proper stress analysis in conducting a failure analysis. Both plane stress...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003530
EISBN: 978-1-62708-180-1
... or assembly for a given combination of loading and boundary conditions. Although this stress state is unique to a specific coordinate system, most commercially available software packages can extract principal stresses as well as maximum shear stresses. A procedure for calculating the planes on which...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001780
EISBN: 978-1-62708-241-9
... The failure analyst dealing with general industry will inevitably encounter a fractured, resulfurized steel. They can be of particular interest, since they exhibit some unusual and impressive fracture surfaces when the fracture plane is parallel to the rolling direction of the product. Ductile fractures...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001597
EISBN: 978-1-62708-236-5
... surface features associated with the cracking. Both #2 pins exhibited large, woody textured fracture planes oriented perpendicular to the plane between 12 and 6 o'clock on the pin ( Fig. 6 and 7 ). Fig. 6 Woody textured fracture on Crank #1, pin #2 Fig. 7 Woody textured fracture...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003539
EISBN: 978-1-62708-180-1
... surfaces. Fig. 1 General features of fatigue fractures. Initiation of Fatigue Initiation of fatigue in common components made of commercial alloys occurs at—and is dominated by—material and geometric heterogeneities. Sites fostering fatigue crack initiation include inclusions, second phase...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006776
EISBN: 978-1-62708-295-2
... General features of fatigue fractures Initiation of Fatigue Initiation of fatigue in common components made of commercial alloys occurs at—and is dominated by—material and geometric heterogeneities. Sites fostering fatigue crack initiation include inclusions, second-phase particles, voids...