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edge-shearing

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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...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0048156
EISBN: 978-1-62708-235-8
...Abstract Abstract A 6150 flat spring was found to be failed. The face of the spring was revealed to be under tensile stress. The failure was concluded to have begun at the dark spot on the edge where roughness resulted from shearing during the blanking operation. Blanking Roghness...
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
..., Special Quality; A681: Standard Specification for Tool Steels, Alloy Fig. 11 Geometry of the chamfered and radiused edges used by Lodge Fig. 12 Position of the sheared surface as determined by the extent of overlap Fig. 10 Chamfer dimensions specified by McIntire and Manning...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001723
EISBN: 978-1-62708-221-1
... through sheared end of tie-bar ×50 Fig. 10 Section adjacent to fractured edge ×100 Fig. 11 Sulphur print indicating that the tie-bar was made From rimming steel Abstract Abstract A new crane failed during the overload test following erection. A test load of 5 tons at the end...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001731
EISBN: 978-1-62708-217-4
... of the inboard axle lub. Chevron markings pointed toward a semi-circular mark about 1 2 -in. in diam (area 1, Fig. 2 ) which indicated that a crack had developed in this area before the final failure occurred. There were no shear lips at the edge of the fracture along the inside surface of the lug...
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
... welds Weld-area cracks Incomplete fusion Porosity Slag inclusions Inclusions at skelp edge Off seam Repair welds Incomplete penetration Electric welds (a) Upturned fiber cracks Weld-line inclusions Cold weld Excessive trim Contact burns Field weld...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001729
EISBN: 978-1-62708-217-4
... conclusions that an explosion was responsible. Previously, studies by one of the authors [1] had established that aluminum alloys of the type used in aircraft exhibited a “reversing shear” fracture surface ( Fig. 1 ) when exposed close to an explosion center. When we examined fracture surfaces of sections...
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 Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... that can cause specimen-scale shear banding is the combination of minimum strain hardening and negative strain rate hardening. A second case in which the central fibrous zone is (apparently) absent has been reported in an HY-100 steel. Both cases are discussed in this article. When edge- or center...
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
... to the applied load. The fracture process proceeds by crack growth toward the surface of the specimen, culminating in a region of slant fracture. Radial marks may or may not be present between the central fibrous zone and the shear zone near the surface. When the central fibrous region is examined...
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
... a critical level, at least at one critical location. Or it may be that fracture did not occur. It should be remembered that some parts are designed to fracture under certain circumstances. Not doing so may constitute the failure. Shear pins, for example, are commonly used to protect valuable equipment...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001391
EISBN: 978-1-62708-215-0
... service, was due to delamination of the wraparound or edge portion of the terminations. The focus of the failure analysis thus turned to determination of the nature and cause of the delamination. The consistent presence of an amorphous, apparently polymeric layer at the metallization interface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0091853
EISBN: 978-1-62708-223-5
... to plate design may reduce overall wear and improve mill efficiency. The cutting flutes on the grinding plates show uniform gouging wear on both sides of the cutting edges, as illustrated in Fig. 3 . This means that the cutting edge of the grinding plate, per se, is not involved in the actual shearing...
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
... be remembered that some parts are designed to fracture under certain circumstances. Not doing so may constitute the failure. Shear pins, for example, are commonly used to protect valuable equipment by acting as mechanical fuses. Stress directors in helicopter gearing are also designed so that if gear tooth...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001812
EISBN: 978-1-62708-180-1
... on the inaccessible side. Pin Fasteners Pin fasteners are one-piece fasteners, either solid or tubular, that are used in assemblies in which the load is primarily shear. A malleable collar is sometimes swaged or formed on the pin to secure the joint. Special-Purpose Fasteners Special-purpose fasteners...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001815
EISBN: 978-1-62708-180-1
... of internal gear and mating pinion Rack A rack is a gear whose teeth lie in a straight line (pitch circle of infinite radius). The teeth may be at right angles to the edge of the rack and mesh with a spur gear ( Fig. 1b ) or may be at some other angle and engage a helical gear ( Fig. 2b ). Bevel...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001243
EISBN: 978-1-62708-225-9
... type, i.e., shear-fatigue fractures due to excessive surface pressure. The needles too were overstressed by compression. It seemed that the higher pressure necessary for the pressing of thicker paper accelerated the corrosion, which lead to the crack initiations of the parts and possibly also...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003563
EISBN: 978-1-62708-180-1
... of maximum and orthogonal shear stress. (b) Propagated subsurface cracks leading to coating delamination during RCF failure of WC-Co coating Fig. 15 Schematic of coating delamination process for cermet and ceramic coatings Fig. 16 Bulk deformation failure of WC-Co coating, indicating...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003560
EISBN: 978-1-62708-180-1
... and increases hole size, a direct result of a change in bit diameter due to thermal expansion. The buildup of wear debris also rounds the cutting edge. Thus, in order to maintain cutting efficiency, the cutting force must be increased, which leads to increased shear stress on the drill bit shank. When...
Book Chapter

Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006790
EISBN: 978-1-62708-295-2
.... , Tang X. , and Wang Y. , Microstructures of Surface White Layer and Internal White Adiabatic Shear Band , Wear , Vol 211 , 1997 , p 164 – 168 10.1016/S0043-1648(97)00099-9 34. Yang Y.-Y. , Fang H.-S. , Zheng Y.-K. , Yang Z.-G. , and Jiang Z.-L...