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shear deformation

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Published: 01 June 2019
Fig. 7 Network of adiabatic shear deformation resulting from complex stress state in the gun during detonation. Etched in picral. More
Image
Published: 01 January 2002
Fig. 35 Local deformation in shear-lip formation. (a) UNS C71500 (70Cu-30Ni) steel tensile specimen showing localized deformation at the exterior surface of the necked region. (b) Cross section of sample in (a) showing shear nature of localized deformation in a region opposite the slant More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001671
EISBN: 978-1-62708-234-1
... is shown in the photomacrograph of Figure 3 , highlighted further by the convergence of radial lines on the fracture surface leading to the origin. The fragment containing the origin also shows a nearly complete absence of plastic deformation and a shear lip, thus confirming the brittle character...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001807
EISBN: 978-1-62708-241-9
... ) 10.1016/j.triboint.2011.05.017 12. Kenji K. , Yukio S. , X-ray texture analysis on cyclic shearing deformation due to rolling contact fatigue . J. Soc. Mat. Sci. Jpn. 53 , 300 – 305 ( 2004 ) 10.2472/jsms.53.300 13. Kenji K. , Yasuo I. , Yukio S. , Texture...
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
..., there is evidence of plastic deformation and failure by microvoid coalescence (MVC) ductile tearing. However, exceptions to this fracture progression mode have been reported. One is formation of a specimen-scale shear band (sometimes associated with void sheet formation at the microscale). One set of circumstances...
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
..., there is evidence of plastic deformation and failure by microvoid coalescence (MVC) ductile tearing. However, exceptions to this fracture progression mode have been reported. One is formation of a specimen-scale shear band (sometimes associated with void sheet formation at the microscale). One set of circumstances...
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
... direction. A zone of heavily deformed grains at the fracture edge was revealed by longitudinal metallographic examination. The shearing fractures of a commercially pure titanium screw and a cast cobalt-chromium-molybdenum alloy were discussed for purpose of comparison. Deformation Surcigal implants...
Image
Published: 01 June 2019
Fig. 1 Mechanically forced shearing fracture of type 316LR stainless steel screw. (a) Fracture surface with typical spiral deformation texture. SEM. (b) Close-up of fracture surface with shear dimples oriented in twisting direction. (c) Fracture edge with flow lines. (d) Longitudinal More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001840
EISBN: 978-1-62708-241-9
... within the material flow [ 12 , 17 ]. By raising this thermomechanical instability above a critical criterion, the plastic deformation will concentrate on local adiabatic sites called adiabatic shear bands (ASB) rather than the whole material [ 12 , 16 ]. Moreover, it is shown that critical condition...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003541
EISBN: 978-1-62708-180-1
... particles or other impact modifiers. Although stress whitening results in visually apparent changes, the load-bearing capabilities of a specimen may not be substantially reduced during stress whitening. Shear Bands Shear bands ( Fig. 8 , Ref 5 ) are also microscopic localized deformation zones...
Image
Published: 01 June 2019
Fig. 2 Shear fracture of a commercially pure titanium screw. (a) SEM fractograph showing spiral textured fracture surface of sheared-off screw. Typical deformation lines are fanning out on the thread. (b) Uniformly distributed shearing tongues and dimples More
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003566
EISBN: 978-1-62708-180-1
... must produce a stress on the potential shear surface that exceeds the flow stress, if plastic deformation is to occur. Once the flow stress is exceeded, localized flow is likely to continue, because the strain-hardening coefficient, n , at high hardness is low, approximately 0.1. In the case of lower...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001659
EISBN: 978-1-62708-231-0
... away from the region where shells form, and could not account for formation of martensite. Shear deformation-induced martensite has been known to form in bearings. Fig. 13 Martensite layer on the shell fracture surface in rail 5. Knoop Microhardness Measurements with 25g Load Table 1...
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
... a dislocation channel. In the present case, channel formation (shear band) is probably related to tool geometry and deformation texture induced during thread rolling. The result of this channeling of dislocations is a faceted fracture appearance as observed in some locations on the shear bands of the fractured...
Image
Published: 01 January 2002
Fig. 2 Schematic figure showing the effect of a normal stress, σ, and a shear stress, τ, on a crystalline material. Application of a normal stress increases the interplanar distance and ultimately results in fracture. Application of a shear stress causes the planes of atoms to slide over each More
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006767
EISBN: 978-1-62708-295-2
...., multiaxial yield criteria). One failure mode theory is the Rankine (or maximum normal stress) criterion, where the maximum principal stress is used. The other is the Tresca theory based on the maximum shear stress. The Rankine criterion holds that inelastic deformation at a point begins when the maximum...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003530
EISBN: 978-1-62708-180-1
... the maximum principal stress is used. The other is the Tresca theory based on the maximum shear stress. The Rankine criterion holds that inelastic deformation at a point begins when the maximum normal stress reaches the yield strength of the material. Tresca's theory states that yield at a point begins when...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
... of metalworking operations that can be roughly divided into bulk-working operations and sheet-forming operations ( Ref 1 ). The general distinction here is that bulk working imposes material flow in all directions, while sheet-forming operations are typically limited to two-dimensional deformation. Metalworking...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0046505
EISBN: 978-1-62708-219-8
... was occasionally used in the system. Analysis (visual inspection and 250x micrograph) supported the conclusions that failure of the latch was caused by plastic deformation from extensive loss of metal by galvanic corrosion and the sudden loading related to the tripping of the valve. Failure in some regions...
Image
Published: 01 January 2002
Fig. 14 Deformation from threads that left impressions on the inside surface of a hole as the members sheared with respect to each other. More