Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

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  • Book Part
    Citation - Scopus: 2
    Mechanical Performance of Metallic Biomaterials
    (Elsevier, 2023) Uzer-Yilmaz,B.; 01. Izmir Institute of Technology
    Metallic biomaterials prevail over other classes of biomaterials with their synergistic combination of superior mechanical properties, corrosion and wear resistance, and long-term biocompatibility. Titanium and its alloys, stainless steels, and Co–Cr alloys have been the mostly preferred metallic biomaterials, though each exhibits significantly different mechanical performance in the body. Chemical composition, microstructure, or applied processing can significantly affect their performances. This chapter explains the phenomenon and mechanisms underlying the mechanical behavior of metallic biomaterials and induced biological responses. Methods to improve these properties are reviewed by referring to in vivo and in vitro examples. Failure of metallic implants and mechanisms leading to unsuccessful treatment are explained. Finally, future prospect of metallic biomaterials and manufacturing processes is discussed. © 2024 Elsevier Inc. All rights reserved.
  • Article
    Citation - WoS: 9
    Citation - Scopus: 9
    The Strain Rate History Effect in a Selective-Laser 316l Stainless Steel
    (Elsevier, 2023) Davut, Kemal; Enser, Samed; Güden, Mustafa; Taşdemirci, Alper; 03.09. Department of Materials Science and Engineering; 03.10. Department of Mechanical Engineering; 01. Izmir Institute of Technology; 03. Faculty of Engineering
    The strain rate history effect in a selective laser melt 316L (SLM-316L) alloy was investigated through quasi-static (10−3 s−1) and high strain rate (1600-3200 s−1) interrupted and reloading compression tests. The specimens pre-tested until about prescribed strains at quasi-static and high strain rates were reloaded dynamically and quasi-statically, respectively. The results revealed that the flow stress depended on strain and strain rate as well as strain-rate history. Quasi-static reloading the dynamically pre-tested specimens until about prescribed strains induced a higher flow stress than the specimens tested quasi-statically. The strengthening was ∼70 MPa at 0.11 pre-strain and decreased as the dynamic test pre-strain was increased due to adiabatic heating. On the other side, reloading the quasi-statically pre-tested specimens dynamically at 0.11 pre-strain resulted in ∼60 MPa lower flow stress than the specimens tested dynamically. The grains of the quasi-statically tested specimens until 0.11 strain were shown to have a lower Taylor factor for twinning and geometrically necessary dislocation density, indicating more potential for twinning than dynamically tested specimen. Although, quasi-statically and dynamically tested specimens were deformed predominantly by the twinning induced plasticity, a higher fraction of twin boundaries was shown microscopically in the dynamically pre-tested specimens until 0.11 pre-strain. This phenomenon of boundary strengthening could be used as a tool of strengthening of SLM-316L alloy at low strains.