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Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270182
EISBN: 978-1-62708-301-0
...Abstract Abstract A turbine in a fertilizer plant began to vibrate and was shut down to investigate the problem. A first stage rotor blade was found fractured and was removed along with several other blades for further examination. Based on their observations and testing, investigators...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430325
EISBN: 978-1-62708-253-2
... tube fatigue, including mechanical or vibrational fatigue, corrosion fatigue, thermal fatigue, and creep-fatigue interaction. It discusses the causes, characteristics, and impacts of each type and provides several case studies. References References 6.1 French D.N. , Failures...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550141
EISBN: 978-1-62708-307-2
...Abstract Abstract Magnesium, by volume, is two-thirds the weight of aluminum and one-quarter the weight of steel. It also has good damping capacity, giving it an edge over other metals in high-vibration environments. This chapter discusses the basic metallurgy, alloy designations, compositions...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270107
EISBN: 978-1-62708-301-0
...Abstract Abstract A helicopter lost the outboard rib on a tail rotor blade in flight and was forced to land because of the resulting vibrations. The investigation that followed is described in this chapter along with key findings. As shown in a sketch, the rib is held in place by a set of six...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270197
EISBN: 978-1-62708-301-0
... rpm. The failure was indicated by excessive vibration of the rotor. A grease-packed sealed ball bearing in an electric motor failed, causing severe vibration of the rotor. Excessive damage was seen on the inner ring raceway and on the surface of the balls, in the form of craters and bruises...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240303
EISBN: 978-1-62708-251-8
..., both the electronic specific heat and electrical resistance are low. Conductivity also depends on the degree to which the electrons are scattered by the ions of the metal that are thermally vibrating, and on impurity atoms or other defects present in the metal. Insulators can also be modified...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730037
EISBN: 978-1-62708-283-9
...). Source: Ref 4.1 . With increased temperature, atoms vibrate more from their normal lattice positions, making the lattice less regular and decreasing the length of the mean free path. This decreases the drift velocity. Figure 4.2 shows that the resistivity, which is the reciprocal...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630189
EISBN: 978-1-62708-270-9
.... Also, the residual stress pattern would be changed drastically, potentially causing other problems. Cavitation Fatigue Since the general title of this section is “Contact Stress Fatigue,” it seems appropriate to include a type of pitting fatigue that is caused by vibration and movement...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230267
EISBN: 978-1-62708-298-3
... 19.3.4 Vibration Packing 19.3.5 Slip Casting 19.3.6 Explosive Compaction The behavior of beryllium powders during conventional sintering has not been investigated extensively, since this method is rarely used in production. Most of the work involving sintering of die-pressed beryllium powders...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110001
EISBN: 978-1-62708-247-1
... these disadvantages, soft docking has the advantage in decoupling tester vibrations. In general, a tester requires to be cooled and it can be accomplished by using an integrated fan or an external water chiller, both of which causes vibrations. The situation is worse on fan-cooled testers. Such vibrations result...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610461
EISBN: 978-1-62708-303-4
... in stationary joints that are “fixed” from shrinking or pressing by interference fits or by bolts, pins, rivets, or other mechanisms, and also at the various contact points in antifriction, or rolling element, bearings. This means that nonrotating antifriction bearings that are subject to vibration over...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240063
EISBN: 978-1-62708-251-8
... the motion in liquids is still rapid, it is much slower than in gases, and in solids, it is even slower. In solids, atomic movements are restricted by the crystal lattice. However, thermal vibrations in solids allow atoms to diffuse, and as the temperature increases, the vibrations of the atoms about...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720267
EISBN: 978-1-62708-305-8
... of oscillations, or vibrations, of the atomic or molecular particles of a substance about the equilibrium position of those particles. Ultrasonic waves can propagate in elastic media, which can be solid or liquid. Ultrasonic waves in the megahertz region are severely attenuated in air and cannot propagate...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870085
EISBN: 978-1-62708-299-0
... of the immediate consequences of the process in normal atmospheric conditions is the production of oxide debris, hence the term “fretting wear” or “fretting corrosion” is applied to the phenomenon. The movement is usually the result of external vibration, but in many cases it is the consequence of one...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270005
EISBN: 978-1-62708-301-0
... Accident Components can occasionally experience service abnormalities that were not anticipated but are capable of producing failures. These abnormalities could be unexpected overloads, temperature changes, environment changes, undesirable vibrations, and so forth. The following are some examples...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780141
EISBN: 978-1-62708-268-6
... machining equipment and cutting oils. In a subsequent operation, Litton cleaned the titanium parts by wiping them and then using ultrasonic cleaning equipment. The ultrasonic cleaner contained a solvent to dissolve and wash away the cutting oils. (Ultrasonic vibration helped the solvent penetrate into all...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270113
EISBN: 978-1-62708-301-0
... 19 “R” material. Subsequent to machining, these parts are to be cadmium plated. The flange and the hinge pin are connected by a taper pin, and to avoid further play and vibration, the two are welded partially. A schematic diagram of the elevator-hinge pin-connecting flange assembly is shown...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870333
EISBN: 978-1-62708-314-0
... never be used, because they can contaminate the internal surfaces of the delamination, making subsequent repair more difficult or impossible. Although tap testing is normally classified as a sonic test method, actually a low-frequency vibration method, it will be discussed here since...
Book Chapter

By Soumya Subramonian
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500001
EISBN: 978-1-62708-317-1
... pulling. Fig. 1.14 Jektole punch with side vent hole. Source: Ref 1.3 The punch and die assembly can align well on the bench during die set-up. But when the press is up and running, the deflective forces in the press and tooling can cause the punch to drift and misalign. Punch vibrations...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110513
EISBN: 978-1-62708-247-1
..., three main stress superimpositions influences can lead to reliability failures. The superimposition of various stressors at the same time: humidity, vibration, mechanical shock, temperature, bending stress etc… Many reliability qualification specifications do not cover stress impact variations...