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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
... Abstract During the internal fixation, the type 316LR stainless steel cortical bone screw failed. Extensive spiral deformation was revealed by the fracture surface. Dimple structure characteristic of a ductile failure mode was observed with dimples oriented uniformly in the deformation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048407
EISBN: 978-1-62708-226-6
... concentration was revealed to be high. Crack initiation Surgical implants 316LR Fatigue fracture The plate shown in Fig. 1(a) and (b) was used to treat a pseudarthrosis in the proximal femur. Because healing did not progress, the plate was removed and submitted for investigation. The bone...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048420
EISBN: 978-1-62708-226-6
... Abstract Fretting and fretting corrosion at the contact area between the screw hole of a type 316LR stainless steel bone plate and the corresponding screw head was studied. The attack on the 316LR stainless steel was only shallow. Mechanical grinding and polishing structures were exhibited...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048405
EISBN: 978-1-62708-226-6
... Abstract Type 316LR stainless steel screws that failed by fatigue were studied. It was found that fatigue fracture can occur on different thread levels, depending on the loading situation. The initiation of secondary fatigue cracks was occasionally found parallel to the fracture plane...
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Published: 01 January 2002
Fig. 11 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
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Published: 01 January 2002
Fig. 14 Type 316LR stainless steel screws that failed by fatigue. (a) Fatigue fractures at different thread levels. (b) Longitudinal section perpendicular to fracture surface without deformation zone at fracture site. A small secondary crack is shown at thread site (arrow). 55×. (c) Fatigue More
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Published: 01 January 2002
Fig. 15 Crack initiation on type 316LR stainless steel dynamic compression plate. (a) Anterior-posterior radiograph. The plate was used to treat the nonunion of a fracture between the fourth and seventh screws. The plate was bent intraoperatively to fit the contour of the bone. (b) Radiograph More
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Published: 01 January 2002
Fig. 17 Top surface of broken plate of type 316LR stainless steel. Fatigue cracks parallel to the fracture edge and a wide area exhibiting primary fatigue deformation are visible. 65× More
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Published: 01 January 2002
Fig. 21 Fatigue curves of type 316LR stainless steel implant material tested in bending mode. (a) S-N curves for stainless steel in cold-worked and soft condition that was tested in air and aerated lactated Ringer's solution. (b) Fatigue curve for number of cycles to failure as shown in Fig More
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Published: 01 January 2002
Fig. 24 Cold-worked type 316LR stainless steel that was fatigued in air at different stress levels. Surfaces of broken specimens at fracture edge are shown. (a) Failure at an applied stress of 330 MPa (47.8 ksi) after 7,682,434 load cycles. Only a few glide systems adjacent to the fracture More
Image
Published: 01 June 2019
Fig. 1 Crack initiation on type 316LR stainless steel dynamic compression plate. (a) Anterior-posterior radiograph. The plate was used to treat the nonunion of a fracture between the fourth and seventh screws. The plate was bent intraoperatively to fit the contour of the bone. (b) Radiograph More
Image
Published: 01 June 2019
Fig. 3 Top surface of broken plate of type 316LR stainless steel. Fatigue cracks parallel to the fracture edge and a wide area exhibiting primary fatigue deformation are visible. 65x More
Image
Published: 01 June 2019
Fig. 1 Type 316LR stainless steel screws that failed by fatigue. (a) Fatigue fractures at different thread levels. (b) Longitudinal section perpendicular to fracture surface without deformation zone at fracture site. A small secondary crack is shown at thread site (arrow). 55×. (c) Fatigue More
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
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048419
EISBN: 978-1-62708-226-6
... of type 316LR stainless steel and some mechanical fretting and very few corrosion pits were revealed. Type 304 stainless steel was deemed not to be satisfactory as an implant material. Inclusions Surgical implants 304 UNS S30400 Pitting corrosion Figure 1 shows a screw head that exhibits...
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Published: 01 January 2002
Fig. 35 Fretting and fretting corrosion at the contact area between the screw hole of a type 316LR stainless steel bone plate and the corresponding screw head. (a) Overview of wear on plate hole showing mechanical and pitting corrosion attack. 15×. (b) Higher-magnification view of shallow More
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Published: 01 January 2002
Fig. 30 Fretting and fretting corrosion at the contact area between the screw hole of a type 316LR stainless steel bone plate and the corresponding screw head. (a) Overview of wear on plate hole showing mechanical and pitting corrosion attack. 15×. (b) Higher-magnification view of shallow More
Image
Published: 01 June 2019
Fig. 1 Fretting and fretting corrosion at the contact area between the screw hole of a type 316LR stainless steel bone plate and the corresponding screw head. (a) Overview of wear on plate hole showing mechanical and pitting corrosion attack. 15x. (b) Higher-magnification view of shallow More
Image
Published: 15 January 2021
Fig. 42 Fretting and fretting corrosion at the contact area between the screw hole of a type 316LR stainless steel bone plate and the corresponding screw head. (a) Overview of wear on plate hole showing mechanical and pitting corrosion attack. Original magnification: 15×. (b) Higher More
Image
Published: 01 January 2002
Fig. 23 Free surface replica showing the development of fatigue-surface damage on recrystallized type 316LR stainless steel in aerated Ringer's solution at 38 °C (100 °F), at applied stress of 250 MPa (35.5 ksi). (a) The first visible slip systems developed at a triple point (decorated More