Resumo Uma das principais exigências de uma prótese de quadril, além da biocompatibilidade, é que ela tenha um bom desempenho em fadiga. As propriedades de fadiga estão diretamente ligadas com a microestrutura do material, sendo assim, entendem-se as exigências microestruturais determinadas por normas para próteses. A microestrutura passa a ter um papel importante na qualidade desses componentes; e sendo ela diretamente influenciada pelos processos de fabricação precedentes, tais processos também devem ser rigorosamente controlados. Nesse trabalho foi analisada uma prótese de quadril, fabricada a partir de uma liga de aço inoxidável, que fraturou por fadiga durante o uso. A análise foi conduzida pelo uso de lupa, microscópio eletrônico de varredura, análise química e análise metalográfica. Foi verificado que apesar da análise química estar dentro dos limites determinados pela norma ABNT NBR ISO 5832-1, a microestrutura estava heterogênea, devido ao processo de forjamento, comprometendo o desempenho em fadiga do componente. Palavras-chave: Análise de falha; Prótese de quadril; Aço inoxidável ABNT NBR ISO 5832-1; Fadiga. THE IMPORTANCE OF MICROSTRUCTURE ON THE PERFORMANCE OF HIP PROSTHESIS Abstract One of the main requirements of a hip prosthesis, besides biocompatibility, is that it has a good fatigue performance. The fatigue properties are directly connected with the microstructure of the material, under these circumstances, is understood the standards specifications for microstructural in prosthetics. So, the microstructure becomes important in the quality of these components, and being it, directly influenced by the fabrication processes, such processes must also be rigorously controlled. In this study was analyzed a hip prosthesis manufactured from a stainless steel alloy that fractured by fatigue during use. The analysis was conducted by using a stereoscope, scanning electron microscopy, chemical and metallographic analysis. It was found that chemical analysis was as determined by ABNT NBR ISO 5832-1 while the microstructure was heterogeneous, due to the forging process, damaging the fatigue performance of the component.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.