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grain rotation

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Published: 01 June 2008
Fig. 16.27 Grain-boundary rotation. Source: Ref 13 More
Image
Published: 30 November 2013
Fig. 16 Schematic sketch of a two-diameter shaft rotating under a bending stress. (a) General shape of a critical stress region in such a part. (b) The stress imposed on each grain, such as grain number 1, as it rotates, with the top of each sine wave representing the maximum tensile stress More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240279
EISBN: 978-1-62708-251-8
... are conducted at temperatures above the recrystallization temperature, which is approximately 0.5 T m . Cold working processes are conducted at or near room temperature, while warm working processes are conducted at intermediate temperatures. Hot working produces a recrystallized grain structure, while...
Image
Published: 01 January 2015
Fig. 8.62 Effect of cooling rate on beta grain size of Ti-6Al-4V produced using various methods. REP, rotating electrode process; PDME, pendent drop melt extraction; EBSQ, electron beam splat quenching; HA, hammer and anvil More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270115
EISBN: 978-1-62708-301-0
... stages on the suction side where the intensity of corrosion of rotation. is expected to be maximum. It is possible that the ner grain size and less carbides in the grains in the blade material, compared with the dovetail material, can give it better stress-corrosion resis- tance. Conclusion The damages...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230199
EISBN: 978-1-62708-298-3
... Two alternative grinding procedures have been reported by Dingle and Moore [1962] . Mechanical grinding through a series of abrasive disks with successively finer grit sizes gives satisfactory results. The specimen should be rotated 90° between disks. In one procedure, specimens are ground...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630117
EISBN: 978-1-62708-270-9
... under a bending stress. (a) General shape of a critical stress region in such a part. (b) The stress imposed on each grain, such as grain number 1, as it rotates, with the top of each sine wave representing the maximum tensile stress. (c) Strength of each of a large number of grains in the critical area...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280117
EISBN: 978-1-62708-267-9
... compositions, such as IN-100 or Rene 95, which are difficult or impractical to forge by conventional methods. A limited use exists for oxide-dispersion-strengthened (ODS) alloys in airfoils. Powder metallurgy of conventional γ′-hardened alloys offers the advantage of creating homogeneous, fine-grained...
Series: ASM Technical Books
Publisher: ASM International
Published: 23 January 2020
DOI: 10.31399/asm.tb.stemsem.t56000020
EISBN: 978-1-62708-292-1
... in which a large con- tinuous bright region representing a single grain of graphene is visible (Fig. 5f). A similar real-space image based on diffraction pattern 2 indicated that the surrounding graphene was all rotated ~10.5 degrees with respect to the large central grain. As might be anticipated based...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400087
EISBN: 978-1-62708-258-7
... iron, Bowling wrought iron, wrought iron armor plate, and blister steel. He found that the samples had definite microstructural features. A copy of Sorby’s 1864 macrograph of blister steel can be seen in Fig. 4.2 . This macrograph, taken at 9×, shows distinct grain boundaries. This discovery...
Series: ASM Technical Books
Publisher: ASM International
Published: 23 January 2020
DOI: 10.31399/asm.tb.stemsem.9781627082921
EISBN: 978-1-62708-292-1
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290137
EISBN: 978-1-62708-306-5
... Fig. 6.18 Example of friction stir welding pin tool. Source: Ref 6.10 , p 17 The rotation of the probe tool stirs the material into a plastic state, creating a very fine-grain microstructural bond. The tool contains a larger diameter shoulder above the knurled probe, which controls the depth...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230253
EISBN: 978-1-62708-298-3
... of this work was to demonstrate that sound beryllium shapes could be centrifugally cast [ Krenzer 1979 ]. Typically, large grains are produced by centrifugally cast beryllium. Constant rotational motion during solidification will suppress the transition from columnar to equiaxed grains [ Stewart et al...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610209
EISBN: 978-1-62708-303-4
... Abstract This chapter provides information and data on the fatigue and fracture properties of steel, aluminum, and titanium alloys. It explains how microstructure, grain size, inclusions, and other factors affect the fracture toughness and fatigue life of these materials and the extent to which...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2023
DOI: 10.31399/asm.tb.ceeg.t59370021
EISBN: 978-1-62708-447-5
... is mulled for a designated time (or until it attains a preset compactibility value). The bentonite clay gels with water to develop the bond. The sand grains are bonded together with the clay, generating the compressive strength of the sand-clay-water mix. Green strength is the compressive strength...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720161
EISBN: 978-1-62708-305-8
..., and the effects of grain size on the structural properties of the material. etchants etching grain size number grinding light optical microscopy metallography microphotography mounting polishing sectioning THE METHODS AND EQUIPMENT described in this chapter cover the preparation of specimens...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140001
EISBN: 978-1-62708-264-8
.... 1.2 . The boundary is a planar interface, generally curved, along which two grains of different orientation intersect. The A planes in grain 4 make a much steeper angle with the horizontal than do the A planes of grain 3. If grain 4 were rotated clockwise to cause its A planes to line up...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740103
EISBN: 978-1-62708-308-9
... is approximately 0.5 T m , where T m is the absolute melting point. Cold working processes are conducted at or near room temperature, while warm working processes are conducted at intermediate temperatures. Hot working produces a recrystallized grain structure, while the grain structure due to cold working...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.smnm.t52140039
EISBN: 978-1-62708-264-8
.... The toughness of steels can be improved by the following factors: Minimizing the carbon content Minimizing the grain size Eliminating inclusions, such as the sulfide stringers shown in Fig. 5.6 . This is done by using steels with low impurity levels of sulfur, phosphorus, and other elements...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630071
EISBN: 978-1-62708-270-9
... a cylinder is twisted in pure torsion, the stress system characteristic of tension loading rotates 45° in one direction or the other, depending on which way the shaft is twisted. When twisted as shown in Fig. 1(b) , the entire stress system rotates 45° counterclockwise. Note that the normal stresses...