1-20 of 945

Search Results for grain rotation

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Image
Published: 01 January 2005
Fig. 25 Rotation axis associated with higher grain-boundary mobility More
Image
Published: 01 November 2010
Fig. 2 Relative orientation of grain boundaries and rotation axes for different types of grain boundaries. (a) Twist boundary. (b) Asymmetrical tilt boundary. (c) Symmetrical tilt boundary More
Book Chapter

Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004018
EISBN: 978-1-62708-185-6
... Abstract Plastic deformation can occur in metals from various mechanisms, such as slip, twinning, diffusion creep, grain-boundary sliding, grain rotation, and deformation-induced phase transformations. This article emphasizes on the mechanism of slip and twinning under cold working conditions...
Image
Published: 01 December 2004
Fig. 55 Grain structure of rotating-quality, forged Waspaloy that was solution annealed and aged. Revealed using: (a) glyceregia, (b) 15 mL HCl, 10 mL acetic acid, and 10 mL HNO 3 , and (c) the Lucas electrolytic reagent (1.2 V dc, 40 s). Original magnification, all 200× More
Image
Published: 01 December 2004
Fig. 56 Grain structure of rotating-quality, forged Waspaloy that was solution annealed and aged but exhibited a necklace-type duplex grain size distribution. Revealed using: (a) glyceregia, (b) 15 mL HCl, 10 mL acetic acid, and 10 mL HNO 3 , and (c) the Lucas electrolytic reagent (2 V dc, 20 More
Image
Published: 01 January 2000
Fig. 11 Typical area of the gage length for a Zn-22Al sample tested at 4 × 10 −5 s −1 to an elongation of 20%. (a) A large offset at a Zn-Al boundary is shown at A and a striated band at a Zn-Zn boundary is marked at B and at C. (b) Grain rotation in a zinc-rich phase is shown at D. Source More
Image
Published: 01 August 2018
(MS) properties, and the dotted line is a theoretical prediction based on a first-principles model for grain rotation contributions to MS. At a bias magnetic field above approximately 3 kOe = 0.3 Tesla, the Lorentz force elastic coupling mechanism dominates. Note that MS coupling peaks More
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005433
EISBN: 978-1-62708-196-2
... grains in a polycrystalline material cannot slide indefinitely because they impinge on other grains. Various processes, such as strain accommodation, grain rotation, grain-boundary migration, grain-switching events, and so on, take place to relax the stress concentrations generated and thus continue GBS...
Book Chapter

By P.S. De, N. Kumar, J.Q. Su, R.S. Mishra
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005637
EISBN: 978-1-62708-174-0
... bands correspond to lower particle density, larger grain size. Reverse is true for lower-strain bands. Textural studies on AA2195-T8 alloy 29 (a) The {111} planes are aligned with the tool rotation axis. (b) Randomly oriented grains in nugget Cu as marker in AA2024-T3 alloys 30...
Book Chapter

By David Dye
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005418
EISBN: 978-1-62708-196-2
.... The grains will rotate during the deformation process, giving rise to texture change. This rotation ω ˙ i j has three components: that due to the macroscopic distortion Ω ˙ i j , which is the antisymmetric component of the applied distortion tensor; the rotation...
Image
Published: 01 November 2010
(tilt boundary). (b) Relationship between the coincidence site lattice and the primary dislocation structure at a grain boundary. If two identical, interlocking lattices (α) are rotated symmetrically away from each other about an axis perpendicular to the plane of view (β), a coincidence site lattice More
Book Chapter

By David P. Field
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003744
EISBN: 978-1-62708-177-1
... and rotated slip planes. After Hertzberg ( Ref 15 ) Deformation of polycrystalline metals is more complicated than this simple example in that it occurs by simultaneous slip on several slip systems in each crystallite. In a similar manner, however, the lattice in each grain will rotate according...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005507
EISBN: 978-1-62708-197-9
... is geometrically characterized by ( Fig. 1 ): The misorientation, which can be expressed as a rotation (three parameters, e.g., three Euler angles) The orientation of the boundary plane with respect to one of the two crystals (two parameters, e.g., unit vector of grain-boundary normal) A displacement...
Image
Published: 01 January 1986
Fig. 24 Rocking curves for individual grains of a polycrystalline sample. Arrays of spots correspond to reflection range of each grain and are obtained by multiple exposures after incremental sample rotations of 3 arc minutes each. (a) Annealed and undeformed type 304 stainless steel. (b) Same More
Image
Published: 01 November 2010
Fig. 38 Anisotropic growth of a grain in rolled aluminum. Prior to annealing, the grain boundary was located at the top of the handle. The micrograph shows the front and back faces of the specimen. The long, straight grain boundaries are approximately perpendicular to the <111> rotation More
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001759
EISBN: 978-1-62708-178-8
..., the crystal axes are first Only three angles are necessary to fix the oriented perpendicular to the wire axis, it is orientation of a grain relative to the macro- rotated counterclockwise to an angle ~pabout necessary only to indicate that the wire has a scopic reference axes. Although a pair of X, ~q ND (Fig...
Image
Published: 01 November 2010
Fig. 1 Four parameters are needed to mathematically define a two-dimensional grain boundary: the orientation relationship as expressed by a rotation angle, ω; an angle, θ, that defines the spatial orientation of the grain boundary with respect to one of the grains; and the components t 1 , t 2 More
Image
Published: 01 January 2005
Fig. 20 Two shear bands (SBs) in a {111}⟨11 2 ⟩ deformed grain. SB1 carries a lesser amount of strain and has only rotated toward {554}⟨22 5 ⟩ whereas SB2 carries a larger amount of strain and has rotated toward {110}⟨001⟩. φ 2 =45° More
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004029
EISBN: 978-1-62708-185-6
.... 5 ( Ref 4 ). For further information regarding this topic, the reader is referred to Ref 5 and 6 . From Fig. 5 , it can be seen that an austenite grain obeying the Bain transformation relationship will be rotated by 45° around each of the three ⟨100⟩ axes in turn, leading to the three...
Image
Published: 01 January 1996
Fig. 18 Variation in rotating-beam fatigue for (a) 2024-T4, (b) 7075-T6, (c) 2014-T6, and (d) 7079-T6 alloys. Notches (60°) were very sharp ( K t > 12) with a radius of about 0.0002 in. Results are from over a thousand rotating-beam tests performed in the 1940s. Sources: R. Templin, F More