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post-impact fatigue

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001143
EISBN: 978-1-62708-229-7
... such as those created by particle impacts on the blades. “Failure due to fatigue” has become the popular catch-all phrase for many failures experienced by turbine blades. In the assessment of financial liability, however, the relationship of fatigue inducing, time varying stresses to other damage mechanisms...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001786
EISBN: 978-1-62708-241-9
... fatigue cracks and sudden impact loading caused by the hitting of tool post with the chuck. Fig. 7 Transgranular crack Fig. 8 Intergranular crack The Fig. 9 shows the details of the rubbed portions of the spline shaft. Fractographic details from these zones are lost due...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001135
EISBN: 978-1-62708-219-8
... Abstract In 1979, during a routine bridge inspection, a fatigue crack was discovered in the top flange plate of one tie girder in a tied arch bridge crossing the Mississippi River. Metallographic analysis indicated a banding or segregation problem in the middle of the plate, where the carbon...
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
... consider loading conditions and loading directions when specifying resulfurized grades of steel. It is clear that without due consideration of these details, unexpected failures of components can be observed in tensile, impact, or fatigue modes. This is especially true if designers are unaware...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001776
EISBN: 978-1-62708-241-9
... at the grain boundaries may have occurred because of improper heat treatment, but not because of a deficiency in composition. crusher jaws fracture embrittlement steel grainy surface texture metallographic analysis impact strength ASTM A 128 grade B-4 (austenitic manganese steel) UNS J91149...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001707
EISBN: 978-1-62708-217-4
... features. The cracking was followed by fatigue in one case and catastrophic failure in the other. Hydrogen embrittlement was identified as the most likely mechanism of failure. Aircraft components Cylinders Ejector pistons Landing gear PH 13-8Mo UNS S13800 Mixed-mode fracture Hydrogen damage...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006912
EISBN: 978-1-62708-395-9
... factors to evaluate carefully. Temperature not only affects physical properties such as impact strength, tensile strength, stiffness, and fatigue, but it also affects chemical resistance and all long-term properties. Therefore, it is highly recommended to test the candidate material at the maximum...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006824
EISBN: 978-1-62708-329-4
... factors that impact fatigue endurance. The HCF life is relatively sensitive to material defects, such as casting pores, inclusions, forging laps, and preexisting cracks, especially when they are present at the surface. Oxidation or corrosion not only can aid in HCF crack propagation but also can assist...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006811
EISBN: 978-1-62708-329-4
... and cons. In terms of suggesting design or manufacturing modifications, failure analysts and device designers must consider (and test) all potential device changes and their impact on performance. Fixing one issue could lead to other, bigger problems down the road. Often, due to mitigating factors (e.g...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003566
EISBN: 978-1-62708-180-1
... contact. Hence, the spalling of gear teeth and bearing materials is also known as fatigue wear or rolling contact fatigue. Spalling damage on a surface can also occur from impact events. For example, the spalling of striking/struck tools is of considerable interest from the engineering, economic...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006910
EISBN: 978-1-62708-395-9
... to fracture (glassy polymers). This article provides an overview of historical development of fracture behavior in polymers. It discusses the processes involved in three fracture test methods for polymers, namely linear elastic fracture mechanics, elastic-plastic fracture mechanics, and post-yield fracture...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003517
EISBN: 978-1-62708-180-1
.... The article discusses metallurgical instabilities of steel-based alloys and nickel-base superalloys. It provides information on several life assessment methods, namely, the life fraction rule, parameter-based assessments, the thermal-mechanical fatigue, coating evaluations, hardness testing, microstructural...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003515
EISBN: 978-1-62708-180-1
... been noted in previous Sections of this Volume, there is a wide range of material/component life assessment strategies appropriate to different industries and damage mechanisms, and these can be implemented within either a probabilistic or deterministic framework. Fatigue is perhaps the most widely...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001812
EISBN: 978-1-62708-241-9
... Failures of components by liquid–metal embrittlement (LME) and solid–metal-induced embrittlement (SMIE) are less common than failures by other environmentally assisted cracking phenomena such as hydrogen embrittlement (HE), stress-corrosion cracking (SCC), and corrosion-fatigue (CF), but a significant...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006768
EISBN: 978-1-62708-295-2
... of Residual Stress in Fatigue The strong impact that surface and near-surface residual stresses have on the fatigue life of components underlies the importance of studying the effect of surface treatments and manufacturing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001595
EISBN: 978-1-62708-235-8
... as an independent variable and the composition as a dependent variable. Clearly, controls such as material and purchasing specifications can be successfully implemented to obtain steel that will yield predictable and suitable post-processing properties for component manufacture. In commercial failure analysis...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006916
EISBN: 978-1-62708-395-9
... properties and leads to voids in the cured part. In summary, improper mixing leads to a compromised network structure, may negatively impact the cure speed (if too little hardener or catalyst is added), and results in trapped air in voids in the final part, thus reducing mechanical properties or fatigue...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003509
EISBN: 978-1-62708-180-1
... electron beam welds electroslag welds fatigue fitness-for-service assessment flash welds friction welding high-frequency induction welds inclusions joint design laser beam welds mechanical testing porosity upset butt welds weld discontinuity weldment failure weldment integrity WELDMENT...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003541
EISBN: 978-1-62708-180-1
... fatigue loading is involved, particularly at high frequency. Hysteretic viscoelastic effects cause energy dissipation as heat, which can accumulate due to the low thermal conductivity of polymers, thus influencing failure mechanisms. The generalized uniaxial tensile creep behavior of plastics under...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006814
EISBN: 978-1-62708-329-4
..., the reader will learn from the mistakes of others and use principles that will avoid the occurrence of similar failures in the future. The topics covered include failure analysis fundamentals, welded connections failure analysis, welded connections and discontinuities, and fatigue. In addition, several case...