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eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2020
ISBN: 978-0-8031-7708-6
... loading as the classical fretting test cannot address the benefit of an additional form fit. In this study, the internal defect characteristics of AM specimens such as pores and lack of fusions, as well as the three-dimensional surface morphology, were characterized by high-resolution microcomputed...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2019
ISBN: 978-0-8031-7663-8
..., the values for corrosion current have not been correlated with clinical performance or outcomes. This study has shown that assembly technique and head offset are factors that affect corrosion current measured in the laboratory. mechanically assisted crevice corrosion modularity fretting micromotion...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2018
ISBN: 978-0-8031-7657-7
... of a modular DM design (MDM) can be a source of corrosion. This retrieval study aims to characterize in vivo damage and fretting corrosion of MDM hips. Twenty-nine MDM explants with both ceramic and metal femoral heads were collected. A custom fixture and a mechanical testing frame were used to disengage...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2018
ISBN: 978-0-8031-7657-7
... but highly dependent on its topography. The imprinting process is at least initially driven by fretting and the generation of oxide particles. Column damage on the other hand is highly dependent on the microstructure of wrought CoCrMo alloys, which can exhibit banding resulting from slight alloy segregations...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2015
ISBN: 978-0-8031-7627-0
... is the prevalence and severity of fretting and corrosion damage at the head-neck modular interfaces in HXLPE total hip arthroplasty (THA) with large head diameters, (2) what device and patient factors influence taper fretting corrosion in contemporary metal-on-polyethylene (MoP) THA, and (3) is taper corrosion...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2015
ISBN: 978-0-8031-7627-0
..., and material loss values of tested components to those of retrieved implants. All tapers tested exhibited corrosion damage on the stem and head tapers. Evidence of wear scars, fretting, metal transfer, and corrosion debris were found. Measurable material loss occurred on all femoral head tapers. Stem machine...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2015
ISBN: 978-0-8031-7627-0
.... The results from this study supported the prevalence of taper damage that is similar between anatomical shoulder and conventional hip arthroplasty. The clinical implications of these findings have not yet been determined. shoulder arthroplasty fretting corrosion modularity hip arthroplasty...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2015
ISBN: 978-0-8031-7627-0
... joint replacements. They typically have at least one of the contacting surfaces composed of metal alloy, which is susceptible to mechanically assisted crevice corrosion (MACC), or fretting crevice corrosion resulting from the loading and exposure to the body environment. This paper describes...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2015
ISBN: 978-0-8031-7627-0
... designs occurred slightly proximal to the distal end of the sleeve, within the sleeve-stem taper, and initiated across a lateral fretting surface. Although the examples presented are system specific, they demonstrate that the structural fatigue curve methodology can easily determine the influence...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2015
ISBN: 978-0-8031-7627-0
... Mechanically assisted crevice corrosion (MACC) has become a significant problem in the orthopaedic device industry, particularly in modular devices with metal-on-metal tapered interfaces. Fretting corrosion in the presence of a crevice accelerates corrosion processes and in some instances may...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2015
ISBN: 978-0-8031-7627-0
... The study of fretting degradation in prosthetic modular junctions requires a combination of tribological testing and electrochemical measurements. The goal of this study was to design a testing apparatus that offers this combination using servoelectric actuator technology because such technology...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2015
ISBN: 978-0-8031-7627-0
..., and some retrieved components exhibit severe fretting corrosion. Fatigue testing in the 10°/9° orientation according to ISO 7206-6 has been shown to replicate the clinical fatigue failures. The location of fractures in the testing was consistent with the highest stress location observed in the finite...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2009
ISBN: 978-0-8031-3416-4
... The objective of this work was to evaluate life prediction methodologies involving fretting fatigue of turbine engine materials with advanced surface treatments. Fretting fatigue tests were performed on Ti-6Al-4V dovetail specimens with and without advanced surface treatments. These tests were...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2006
ISBN-10: 0-8031-3497-5
ISBN: 978-0-8031-3497-3
... pain (4), femoral or acetabular loosening (4), infection (3), recurrent dislocation (2), or component malposition (1). The devices and, in selected cases, tissue from the joint psuedocapsule were studied with the use of light and scanning electron microscopy. Fretting corrosion products were...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2003
ISBN-10: 0-8031-3459-2
ISBN: 978-0-8031-3459-1
... Experiments were performed in a wear machine especially constructed to simulate the natural in vivo process of wear in a de-bonded metal-cement interface. Four different bone cements were fretted against S-30 stainless steel with mat surface finish. The validation of the metal surfaces...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2003
ISBN-10: 0-8031-3459-2
ISBN: 978-0-8031-3459-1
... used in orthopaedic appliances. Stainless steel corrosion crevice fretting modularity chromium particulate debris metal ions osteolysis cytokines serum proteins systemic dissemination Robert M. Urban, 1Joshua J. Jacobs,1Jeremy L. Gilbert,2 Anastasia K. Skipor, 1Nadim J. Hallab...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2003
ISBN-10: 0-8031-3456-8
ISBN: 978-0-8031-3456-0
... Fretting wear and fretting fatigue are commonly associated with damage of quasistatic loaded assemblies and with decrease in lifetime. Depending on the sliding condition, wear induced by fretting or cracking induced by fretting can be observed. To quantify such competitive damage phenomena...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2003
ISBN-10: 0-8031-3456-8
ISBN: 978-0-8031-3456-0
... An investigation of fatigue crack initiation and propagation under fretting conditions is described in which both experimental and theoretical approaches are used. Fretting tests were conducted on an aerospace aluminium alloy. The approach presented here aims to describe the propagation...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2003
ISBN-10: 0-8031-3456-8
ISBN: 978-0-8031-3456-0
... The fretting problem is of particular interest to the damage tolerant design of turbine blades in today's gas turbine engines. The exotic environment, high-frequency, and variable amplitude load history associated with the dovetail blade/disk connection create a critical location for fretting...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2003
ISBN-10: 0-8031-3456-8
ISBN: 978-0-8031-3456-0
... Two bodies are said to be in fretting contact when they are clamped together under the action of a normal force and see an oscillatory motion of small amplitudes at the contact interface due to the effect of shear force and bulk stress. The contact stresses that drive crack nucleation are very...