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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001788
EISBN: 978-1-62708-241-9
...Abstract Abstract Several failed dies were analyzed and the results were used to evaluate fatigue damage models that have been developed to predict die life and aid in design and process optimization. The dies used in the investigation were made of H13 steels and fractured during the hot...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001794
EISBN: 978-1-62708-241-9
... the values used in the design calculations, thus causing the initiation of the cracking. Moreover, although the shaft had been quenched and tempered, its actual hardness did not have the optimal value for long-term fatigue strength. drive shaft fatigue fracture rotating-bending variable stress 4340...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001634
EISBN: 978-1-62708-221-1
... the nominal service life of the hose must be taken into account to determine the optimal design life of the hose. Hydraulic hoses are typically regarded as a consumable item and are replaced after a nominal number of hours in service regardless of their condition. Many operators of hydraulic equipment...
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
... was recommended to address the anomalies, with the objective of enhancing rotor life management practices. The ongoing work involves the use of fracture mechanics and software (called DARWIN.) optimized for damage tolerant design and analysis of metallic structural components. Compressors Damage tolerance...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001518
EISBN: 978-1-62708-228-0
... leakage or other malfunction is set in the standard specifications. Secondly, corrosion and its effects on reducing the nominal service life of the hose must be taken into account to determine the optimal design life of the hose. Hydraulic hoses are typically regarded as a consumable item...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0009190
EISBN: 978-1-62708-225-9
... that the failure resulted from several interrelated factors: the lubricant viscosity was too low causing high temperatures; no antiscuff additives were used; a gearbox designed as a speed reducer was used as a speed increaser (the designer selected a long-addendum tooth for the pinion); the gear teeth were...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001635
EISBN: 978-1-62708-221-1
.... Secondly, corrosion and its effects on reducing the nominal service life of the hose must be taken into account to determine the optimal design life of the hose. Hydraulic hoses are typically regarded as a consumable item and are replaced after a nominal number of hours in service regardless...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001828
EISBN: 978-1-62708-241-9
..., and the environmental conditions of exposure. By optimal design and assembly fits of the component, it is possible to restrict the induced stresses to levels below the material threshold limit. Much of the published literature, including characterization of corrosion fatigue, pertains to the results of the tests...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006815
EISBN: 978-1-62708-329-4
... is optimized), including thrust, revolutions per minute, air flow, fuel flow, key flowpath temperatures, and so on. The design specification also defines: Required off-design performance Cyclic life and creep life for engine components Overspeed capability Bird strike survivability Number...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006800
EISBN: 978-1-62708-329-4
... sophistication in design and processing was required. However, with the heightened awareness of efficient design, optimized performance, economic competition, environmental impacts, safety concerns, and legal liability, current methods of materials selection are viewed more and more as a simultaneous...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003501
EISBN: 978-1-62708-180-1
... in design and processing was required. However, with the heightened awareness of efficient design, optimized performance, economic competition, environmental impacts, safety concerns, and legal liability, current methods of materials selection are viewed more and more as a simultaneous and integral...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003502
EISBN: 978-1-62708-180-1
... into the requirements. The result is that the concept selected will be over-constrained and therefore not an optimal solution to the problem. A large number of custom-designed vertical lift conveyors were required for use in a series of new automated U.S. mail-sorting facilities. These facilities comprise...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c9001606
EISBN: 978-1-62708-226-6
... not always lend itself to satisfactory mechanical/metallurgical design practice. Circumstances that inhibit optimal design may be dictated by the patient's anatomy and physiological conditions. These may create an undesirable situation for even the short-term survival of the fixation device after...
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
.... Consequently, the concept expressed by equation 3 , i.e. limiting the wall thickness, should be blended with traditional design procedures which are based, solely, on strength of materials considerations and favor increasing wall thickness. This will yield an optimal wall thickness, which in turn will ensure...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001294
EISBN: 978-1-62708-215-0
...Abstract Abstract A precipitation-hardened stainless steel poppet valve assembly used to shut off the flow of hydrazine fuel to an auxiliary power unit was found to leak. SEM and optical micrographs revealed that the final heat treatment designed for the AM-350 bellows material rendered the AM...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0065827
EISBN: 978-1-62708-221-1
...), hardnesses from 56 to 59 HRC, and retained austenite contents varying from a trace to 8% in failed knives. The alloy design program was established to produce a lower-cost composition (based on the cost to add various alloying elements) with significantly higher toughness, which is easily heat treated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c0065825
EISBN: 978-1-62708-228-0
... and fracture propagation were needed be controlled. It was concluded that improved steel processing procedures, chiefly hot-working temperature and deformation control, were also required to optimize microstructure and properties. Chemical composition Ductile brittle transition Gas pipelines Steel...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006838
EISBN: 978-1-62708-329-4
... ( Ref 35 ). Topological optimization is another benefit unique to the metal AM processes. This design approach uses both solid modeling and stress-analysis software to analyze a predictably loaded part. This ensures that most or all fabricated sections of the part carry loads, with the objective...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001605
EISBN: 978-1-62708-217-4
... proposed. Additionally, clear requirements should be given for the heat treatment of these parts. The cause of the fracture and the cracks can be led back to load, design, and deviations from the preferred manufacturing process. Only an optimal harmonizing of material, load, manufacturing, and design can...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001074
EISBN: 978-1-62708-214-3
... by the presence of shrinkage cavities, which lowered the load-bearing capability. The failure occurred at the location where there was an abrupt change in the section thickness. A redesign to provide a smooth contour at the section junction was recommended along with optimization of casting parameters to avoid...