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ASTM F75

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0089543
EISBN: 978-1-62708-226-6
... Abstract Threads of a bone screw (Co-Cr-Mo alloy, type ASTM F75) had broken off, and other threads had cracked. 15x sectioning showed porosity, and 155x magnification showed gas holes, segregation, and dissolved oxides. This supports the conclusion that manufacturing defects caused the failure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.med.c0048399
EISBN: 978-1-62708-226-6
... on the fracture surface of this pin. Thus, the effect of different conditions of cobalt-chromium alloys on failure behavior was demonstrated as a result of this study. Grain boundaries Surgical implants ASTM F75 Brittle fracture Two of four adjustable Moore pins, which had been used to stabilize...
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
... propagated through a larger gas pore by a ruptured gas pore. The stresses created through the fatigue process activated glide systems which served the formation of secondary cracks along glide planes. Crack propagation Porosity Slip planes Surgical implants ASTM F75 Fatigue fracture In a 65...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001133
EISBN: 978-1-62708-214-3
... not occur during the sintering thermal cycle. It was recommended that the prosthetic manufacturer investigate atmosphere controls for all thermal cycles prior to coating. Adhesion Bonding strength Interface reactions Powder coating Surgical implants ASTM F75 UNS R30075 Surface treatment related...
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
... of the micrograph. 62× For comparison, the shearing fractures of a commercially pure titanium screw and a cast cobalt-chromium-molybdenum alloy (ASTM F75) screw are shown in Figures 2 and 3 . The spiral-textured fracture surface of the titanium screw was smooth ( Fig. 2a ) and had uniform, shallow shearing...
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
..., and dissolution of oxides. With today's advanced casting techniques and testing methods, such implant defects can be avoided and eliminated. Fig. 7 Retrieved screw of cast cobalt-chromium.molybdenum alloy (type ASTM F75). (a) Defective screw threads from casting deficiencies. (b) Longitudinal section...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1