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Vibratory stresses

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Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2023
DOI: 10.31399/asm.tb.ceeg.t59370095
EISBN: 978-1-62708-447-5
... of new sand to be added to the return sand in green sand systems. Rotary shakeout systems are ideally suited for flaskless green sand and no-bake systems. Smaller volumes of larger sized castings are better suited for vibratory shakeouts, where crane handling and manual intervention are usually...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870085
EISBN: 978-1-62708-299-0
... develop across the width of the grains, and the grains become increasingly undulated. Eventually, the undulations develop into craters and material is lost by necking of the rims of the craters. Fig. 1 Scanning electron micrographs of polycrystalline aluminum exposed to vibratory cavitation...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2023
DOI: 10.31399/asm.tb.ceeg.t59370021
EISBN: 978-1-62708-447-5
.... Vibratory feeders are also used to deliver new sand from the hopper to the core sand mixer. The chute is angled at 5° for the flow of the sand. Level sensors in the mixer send a signal to the vibratory motor to turn off once the preset level has been reached. Some foundries use a timer control to regulate...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200197
EISBN: 978-1-62708-354-6
... together. This energy may be supplied by a vibrating deck or grate, shaker pan conveyor, or any other type of vibratory mechanical action ( Figure 15-1 ). For small castings, the vibratory shakeout action may be combined with a means of conveying the casting to the location where the next operation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940451
EISBN: 978-1-62708-302-7
..., Nickel-Rich, Chromium-Bearing Alloys G 30, Practice for Making and Using U-Bend Stress-Corrosion Test Specimens G 31, Practice for Laboratory Immersion Corrosion Testing of Metals G 32, Test Method for Cavitation Erosion Using Vibratory Appara- tus G 33, Practice for Recording Data from...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480141
EISBN: 978-1-62708-318-8
... by applying heat or stress. The α′ phase is supersaturated alpha formed by a diffusionless shearlike transformation of the beta phase at or below the martensite start (M s ) temperature by rapid cooling beta-lean alloys. Figure 7.9 shows α′ in the Ti-6Al-4V alloy formed by water quenching the alloy from...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060115
EISBN: 978-1-62708-355-3
... on the observation that tensile strain (ε) is linearly proportional to the applied stress (σ). This linear relationship provides an adequate description of the behavior of metals and alloys under most practical situations. However, when materials are subjected to cyclic or vibratory loading, even slight departures...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200007
EISBN: 978-1-62708-354-6
...” of vibratory soil compactors. Feet (120 are used in the largest model) are tapered, flat top units about 5 in. (130 mm) high with a 14 in. 2 (90 cm) cross-sectional area. The hitch housing ( Figure 2-55 ) produced in medium carbon cast steel is a highly stressed part. The streamlined design prevents...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850060
EISBN: 978-1-62708-260-0
... epitaxially and frequently is observed as a white-etching surface layer on steels. This zone exhibits high hardness, which is due to the presence of as-quenched martensite, and retained austenite. High residual tensile stresses are produced. Beneath the white-etching as-cast layer is a dark-etching heat...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270005
EISBN: 978-1-62708-301-0
.... Improper Design Underestimate of service stress Undesirable geometry Stress concentrators Inadequate radii at corners Inaccessibility for inspection Difficult to fabricate Improper choice of materials Improper choice of heat treatment Environmental effects Ad hoc...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250139
EISBN: 978-1-62708-345-4
... of application. Depending on application stress levels, different materials and density levels are used. For example, iron-carbon or iron-carbon-copper materials with densities of 6.0 to 6.8 g/cm 3 are used in gear pumps for low-pressure applications such as engine lubrication and automatic transmissions...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300121
EISBN: 978-1-62708-323-2
... used in an engine. The bearings similarly are tested, but the oils must withstand bench tests at an elevated temperature and 10,000 rpm in a rolling element bearing with heavy contact stresses, near the compressive strength of the bearing steel. Typically, only two out of ten candidate oils can qualify...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060001
EISBN: 978-1-62708-343-0
... Abstract This chapter familiarizes readers with the mechanisms involved in creep and how they are related to fatigue behavior. It explains that what we observe as creep deformation is the gradual displacement of atoms in the direction of an applied stress aided by diffusion, dislocation...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740325
EISBN: 978-1-62708-308-9
..., edges, and corners of the parts, or to cause the parts to rub against each other, or both. This action may deburr, generate edge and corner radii, clean the parts by removing rust and scale, and modify the surface stress. The basic mass finishing processes include: Barrel finishing Vibratory...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060175
EISBN: 978-1-62708-261-7
... combinations of properties, such as ductility, formability, and machinability. The various heat treatment processes include annealing, stress relieving, normalizing, spheroidizing, and hardening by quenching and tempering (see Chapter 9, “Heat Treatment of Steel,” in this book). Quality Descriptors...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780093
EISBN: 978-1-62708-268-6
... material strength, susceptibility to temperature and humidity cycles, and other related characteristics. Techniques in this area include stress analysis as well as testing for hardness, materials strength, fatigue, environment, and accelerated aging. Chemical and composition analysis for assessing...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280203
EISBN: 978-1-62708-267-9
... superalloys are extremely susceptible to what may appear to be minor changes in surface environment. For instance, residual stresses play an important role in the life of a component. Favorable residual stresses frequently are introduced by machining. An attempt to remove contaminants by mechanical...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030067
EISBN: 978-1-62708-349-2
... material properties contained in one composite material. Boron fibers are extremely brittle and the critical crack length is sufficiently short that any stress raiser or abrasion may result in the fiber shattering ( Fig. 4.2 ). Given this, trying to cross section and polish boron fiber composites...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.omfrc.t53030115
EISBN: 978-1-62708-349-2
... development are common areas where this technique is invaluable. An ideal thin section is one where the only residual stress and strain that should be observed is that from the original specimen rather than introduced by the preparation technique ( Ref 3 , 4 ). Polymeric materials cannot be microtomed (which...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030215
EISBN: 978-1-62708-282-2
..., localized corrosion, galvanic corrosion, intergranular corrosion, stress-corrosion cracking, hydrogen damage, and erosion-corrosion. In addition, the economic importance of cost-effective materials selection is also considered. materials selection corrosion control general corrosion localized...