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Fatigue Performance of Medical Ti6Al4V Alloy after Mechanical Surface Treatments

Sonntag, Robert; Reinders, Jörn; Gibmeier, Jens; Kretzer, J. Philippe

Mechanical surface treatments have a long history in traditional engineering disciplines, such as the automotive or aerospace industries. Today, they are widely applied to metal components to increase the mechanical performance of these. However, their application in the medical field is rather rare. The present study aims to compare the potential of relevant mechanical surface treatments on the high cycle fatigue (R = 0.1 for a maximum of 10 million cycles) performance of a Ti6Al4V standard alloy for orthopedic, spinal, dental and trauma surgical implants: shot peening, deep rolling, ultrasonic shot peening and laser shock peening. Hour-glass shaped Ti6Al4V specimens were treated and analyzed with regard to the material’s microstructure, microhardness, residual stress depth profiles and the mechanical behavior during fatigue testing. All treatments introduced substantial compressive residual stresses and exhibited considerable potential for increasing fatigue performance from 10% to 17.2% after laser shock peening compared to non-treated samples. It is assumed that final mechanical surface treatments may also increase fretting wear resistance in the modular connection of total hip and knee replacements.

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Verlagsausgabe §
DOI: 10.5445/IR/1000047743
Veröffentlicht am 17.01.2018
DOI: 10.1371/journal.pone.0121963
Zitationen: 38
Web of Science
Zitationen: 22
Zitationen: 39
Cover der Publikation
Zugehörige Institution(en) am KIT Fakultät für Maschinenbau (MACH)
Institut für Angewandte Materialien - Werkstoffkunde (IAM-WK)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2015
Sprache Englisch
Identifikator ISSN: 1932-6203
KITopen-ID: 1000047743
Erschienen in PLoS one
Verlag Public Library of Science (PLoS)
Band 10
Heft 3
Seiten Art.Nr. e0121963
Nachgewiesen in Scopus
Web of Science
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