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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001491
EISBN: 978-1-62708-217-4
... procedures and resumed production of nozzle liners with more tightly controlled fiber/fabric materials. Proof stress Quality control Silica-phenolic (Other, general, or unspecified) fracture (Other, general, or unspecified) processing-related failures I. Introduction This report describes...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047641
EISBN: 978-1-62708-235-8
... into the gas channel. Thermal stresses cracked the embrittled weld, exposing the crack surfaces to oxidation before cooling. One of these cracks caused a stress concentration so severe that failure of the vessel wall during the proof test was inevitable. A sealing system at the split-line region...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001906
EISBN: 978-1-62708-217-4
... testing, scanning electron microscopy, and energy-dispersive x-ray spectroscopy. It was determined that the failures were due to forging defects. Both forging laps and seams acted as stress concentrators when the lugs were loaded during proof testing. Bombs (weapons) Suspension lugs Forging...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001054
EISBN: 978-1-62708-214-3
... Abstract Silver solid-state bonded components containing uranium failed under zero or low applied load several years after manufacture. The final operation in their manufacture was a proof loading that applied a sustained tensile stress to the bond, which all components passed. The components...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0090457
EISBN: 978-1-62708-222-8
... design change. Because of the configuration of the parts, standard mechanical testing could not be performed. Instead, a proof load test was devised to directly assess the stress required to produce failure within the tab, at an area consistent with the failure latch assembly. A direct comparison...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001558
EISBN: 978-1-62708-217-4
.... At this point, it is necessary to examine the processing, proof testing and operating history of the valve to correlate the stresses and environments with the fractographic observations. Material and Processing The valve body was produced from Ti-5Al-2.5Sn ELI (extra low interstitial) and had 0.095...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0046044
EISBN: 978-1-62708-235-8
... Abstract A rocket-motor case made of consumable-electrode vacuum arc remelted D-6ac alloy steel failed during hydrostatic proof-pressure testing. Close visual examination, magnetic-particle inspection, and hardness tests showed cracks that appeared to have occurred after austenitizing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001512
EISBN: 978-1-62708-228-0
... Abstract When a large LPG low-carbon steel storage tank was put into service for the first time and filled beyond the proof testing level, a brittle fracture crack initiated at a fillet weld between a stiffener ring and the wall. The crack propagated to a length of 5.5 m and arrested. Analysis...
Image
Published: 01 June 2019
cracks in the fusion zone and HAZ. 3x. (b) Fracture origin (top) formed by welding stresses on the contaminated weld metal. The light region below the origin is the rupture that occurred during the proof test. Approximately 5x More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001724
EISBN: 978-1-62708-234-1
... commences. Stress-relieving, prior to final machining, by heating for 5 hr. at 750° F. and cooling in the furnace.” By the above manufacturing routine, end bells were produced to meet the specification's minimum tensile requirements, namely, 112,000-psi. yield (0.5% proof stress), 128,000-psi...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001670
EISBN: 978-1-62708-217-4
... case. Questions arose as to how the softening occurred and whether or not it had contributed to the failures. This report contains the results of a study which resolved that inner wall softening could not have been present in the failed missile cases. Missile cases Proof testing Softening 18Ni...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001287
EISBN: 978-1-62708-215-0
... are reproducible and typical for steel of this composition. Tensile testing results Table 2 Tensile testing results Specimen identification (a) Reduction of area, Elongation, Yield stress 0.2% proof stress Ultimate tensile strength % % MPa tonf/in. 2 MPa tonf/in. 2 MPa tonf...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0006440
EISBN: 978-1-62708-234-1
... and proof tested. It was recommended that the water system consisting of deionized water and formaldehyde be replaced with water having a low oxygen content and a cathodic inhibitor (oxygen scavenger). Brazed joints Mirrors Molybdenum Erosion - corrosion Intergranular corrosion A failed laser...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001142
EISBN: 978-1-62708-228-0
... produced by deep drawing, a bottom plate is welded to the another CUP, and these cups are welded to each other at the edges of these cups. Then. the cylinder is annealed again after welding, and pressure proof test is carried out. Then the cylinder is painted and LPG cylinder is manufactured. 2...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001455
EISBN: 978-1-62708-234-1
...% was indicated as being necessary to ensure that the treatment conferred virtual immunity to exfoliation corrosion. As is usually found, most advantages introduce concomitant disadvantages and over-ageing leads to a reduction in proof stress and tensile strength values, but for the time and temperature...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001383
EISBN: 978-1-62708-215-0
...− Conclusion and Recommendations Most Probable Cause The potential for cracking a hardened carburized case in a high-strength stud is significant, considering the common use of either air impact wrenches or the possibility of exceeding the proof stress with a wrench. A cracked case enables moisture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001668
EISBN: 978-1-62708-232-7
... the specified proof load. However, this value was still below the actual yield point of the material even with a biaxial tension/torsion load. Bolt Strengths and Specifications Table 2 Bolt Strengths and Specifications Property Measured Values Specified Mean Std Dev Value (a) Yield...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001432
EISBN: 978-1-62708-221-1
... the appropriate qualification tests. In many instances production tests plates may be called for and it is the usual practice for the item to be finally examined by non-destructive methods and a proof carried out. To the uninitiated on the other hand, welding appears on obviously simple process...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001426
EISBN: 978-1-62708-224-2
... welding. As the welding across the major portion of the section was satisfactory, the chain would be capable of passing the normal proof test, but the discontinuities that were present acted as stress-raisers that extended in the form of cracks following loading in service ultimately a link failed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001140
EISBN: 978-1-62708-227-3
... alloys for storage of compressed breathing gasses, increases constantly. The design of most of these cylinders is based on classical “strength of materials” considerations i.e. employing thin wall cylinder equations and requiring that the proof hoop stress (1.5× service hoop stress) in the thinnest...