Mechanism of Fatigue Crack Growth in Biomedical Alloy Ti-27Nb
| Autor: | Amer Farhan Rafique, Muhammad Adil Khattak, Rafiullah Khan, Muhammad Amjad, Saeed Badshah, Wail Harasani |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Simulated body fluid microstructure Fractography 02 engineering and technology fatigue crack growth behavior Plasticity 01 natural sciences lcsh:Technology Article fracture toughness Fracture toughness 0103 physical sciences Titanium alloys General Materials Science Composite material lcsh:Microscopy lcsh:QC120-168.85 010302 applied physics lcsh:QH201-278.5 lcsh:T Titanium alloy Biomaterial Paris' law 021001 nanoscience & nanotechnology simulated body fluid lcsh:TA1-2040 Fracture (geology) lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering 0210 nano-technology lcsh:Engineering (General). Civil engineering (General) lcsh:TK1-9971 |
| Zdroj: | Materials Volume 13 Issue 10 Materials, Vol 13, Iss 2299, p 2299 (2020) |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma13102299 |
| Popis: | Implants are widely used in the human body for the replacement of affected bones. Fatigue failure is one of the serious concerns for implants. Therefore, understanding of the underlying mechanism leading to fatigue failure is important for the longevity of biomaterial implants. In this paper, the fracture toughness and fatigue crack growth of titanium alloy biomaterial Ti-27Nb has been experimentally investigated. The Ti-27Nb material is tested for fatigue crack growth in different environmental conditions representing the ambient and in vitro environments for 504 hours and 816 hours, respectively. Fractography of the tested specimen is conducted using Scanning Electron Microscope (SEM). The results of the fatigue crack growth propagation of the ambient and in vitro samples are similar in the Paris crack growth region. However, in the threshold region, the crack growth rate is higher for the Simulated Body Fluid (SBF) treated specimen. The fracture surface morphology of in vitro samples shows brittle fracture as compared to ambient specimens with significant plasticity and striations marks. It is proposed that a similar investigation may be conducted with specimens treated in SBF for prolonged periods to further ascertain the findings of this study. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |