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crystallographic texture

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Published: 01 December 1993
Fig. 7 Scanning electron micrograph of vane shown in Fig. 6 , showing highly crystallographic morphology. Coarse-textured area is a fresh fracture created in the laboratory. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048403
EISBN: 978-1-62708-226-6
... a zone of heavily deformed grains at the fracture edge. The microstructure and the hardness of the screw corresponded to the standards. Fig. 1 Mechanically forced shearing fracture of type 316LR stainless steel screw. (a) Fracture surface with typical spiral deformation texture. SEM. (b) Close-up...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001366
EISBN: 978-1-62708-215-0
... , showing dark, discolored fracture path. Initiation appears to be from multiple sites along the vane-to-hub blend radius. 4× Fig. 7 Scanning electron micrograph of vane shown in Fig. 6 , showing highly crystallographic morphology. Coarse-textured area is a fresh fracture created...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048423
EISBN: 978-1-62708-226-6
... are oriented differently with respect to the propagating crack and therefore exhibit different crystallographic fracture patterns. Grain A ( Fig. 4b ) has a relatively flat texture, but also shows crystallographically oriented structures. Grain B ( Fig. 4c ) is characterized by a staircase pattern. Material...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001819
EISBN: 978-1-62708-180-1
.... Ductile shearing fractures are characterized by a spiral texture of the fracture surface, flow lines at the fracture edges, overload dimple structure on the fracture surface, and heavily deformed microstructure at the fracture edge in longitudinal sections. Occasionally, screw heads can be sheared off...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001715
EISBN: 978-1-62708-219-8
... and by the textured microstructure of the wire. Corrosion on the outside surface of the wire progressed into the wire along a more or less planar front, as shown in Figure 4 . The corrosion grew more rapidly around the circumference of the wire than into the wire, due to the strong crystallographic texture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001660
EISBN: 978-1-62708-236-5
... formed and widely spaced, indicating a lack of adequate adhesion ( Figure 4 ). The fracture appearance of the shear band is similar to a channel fracture [ 2 ]. The mechanism for this type of fracture is theorized to be a pile-up of dislocations in a narrow band of crystallographic planes forming...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001825
EISBN: 978-1-62708-241-9
... of a feathery, crystallographic morphology. This morphology is consistent with a fatigue fracture mechanism [ 1 ]. Faint microscopic striations observed in a few areas of the facture surface were further evidence of the fatigue fracture mechanism for these cracks. Fatigue fractures occur due to cyclic...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003537
EISBN: 978-1-62708-180-1
... and K Issc Decreased resistance to fatigue crack growth Crystallographic texture in α-β titanium alloys Preferred orientation of the hexagonal α phase in microstructures with individual α and β grains Crack blunting, branching and irregularity depend on texture Complex and strong...
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
...- to outermost airfoil ( Fig. 5a ). The airfoil surfaces exhibited a coarse, intergranular texture where material loss had occurred ( Fig. 5b ). Deposits had accumulated on airfoils downstream of the first stage. The loss of material was most significant with the first-stage blades and was progressively less...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003543
EISBN: 978-1-62708-180-1
... in direction consistent with applied loads• Dull, fibrous fracture• Shear lips • Little or no distortion• Flat fracture• Bright or coarse texture, crystalline, grainy• Rays or chevrons point to origin • Flat progressive zone with beach marks• Overload zone consistent with applied loading direction• Ratchet...
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
... no shear stress. (b) Elliptical: exhibiting ψ-splitting due to shear stress. (c) Nonlinear: oscillatory behavior due to preferred crystallographic orientation. Source: Ref 1 Fig. 4 Elliptical analysis on stress-free iron powder with a 30 mm (1.2 in.) focal radius goniometer Fig. 10...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... to 50× (fracture surface) • Necking or distortion in direction consistent with applied loads • Dull, fibrous fracture • Shear lips • Little or no distortion • Flat fracture • Bright or coarse texture, crystalline, grainy • Rays or chevrons point to origin • Flat progressive zone with beach marks...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001617
EISBN: 978-1-62708-227-3
... spectroscopy of fracture surfaces did not reveal any evidence of residual contaminants. For longitudinal cracks, the texture of the fracture surface reflected the underlying banded microstructure and, in a few cases, very faint progression markings were evident (to the experienced eye) ( Fig. 8 ). Fig. 7...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001820
EISBN: 978-1-62708-180-1
... to crystallographic texturing of the steel during processing. This causes the steel to exhibit secondary fractures in the plane of the plate in a brittle mode under the influence of triaxial stress created as the primary ductile fracture propagates. One characteristic of a separated fracture surface...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003528
EISBN: 978-1-62708-180-1
... relief, induction hardening, service temperature, thermal strains, etc.) X-Ray Diffraction Theory and Residual Stress Measurement The XRD technique uses the distance between crystallographic planes, that is, d -spacing, as a strain gage. This method can only be applied to crystalline...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006769
EISBN: 978-1-62708-295-2
... on the surface of a sample, as well as the ability to determine the composition of the sample and crystallographic information. Thus, the SEM provides the user with an unparalleled ability to observe and quantify the surface of a sample. Development of Scanning Electron MicroscopeTechnology Development...