Strength and fracture mechanism of nanostructured metal materials for medical applications

G.V. Klevtsov, R.Z. Valiev, M.V. Fesenyuk, N.A. Klevtsova, M.N. Tyurkov, A.A. Matchin, E.V. Nosov show affiliations and emails
Received 17 September 2022; Accepted 29 November 2022;
Citation: G.V. Klevtsov, R.Z. Valiev, M.V. Fesenyuk, N.A. Klevtsova, M.N. Tyurkov, A.A. Matchin, E.V. Nosov. Strength and fracture mechanism of nanostructured metal materials for medical applications. Lett. Mater., 2022, 12(4s) 493-498
BibTex   https://doi.org/10.22226/2410-3535-2022-4-493-498

Abstract

Diagrams "Torque - angle of twist" (a, b) and "Fatigue kinetic diagrams" (c, d) of materials for medical applications. 1- СG materials; 2, 3 - UFG materials (2- ECAP-C; 3- ECAP-C +D)In this paper we study titanium Grade4, magnesium alloy Mg-Zn-Ca, corrosion-resistant austenitic steel 08Kh18N9 for medical applications. The mechanical properties in tension, torsional strength, and cyclic crack resistance under different types of loading of steels are investigated. The results are compared for two states of steels: the initial coarse-grained (CG) state and ultrafine-grained (UFG) state produced by severe plastic deformation processing via equal-cannel angular pressing (ECAP). It is demonstrated that the ultrafine-grained materials have essentially better strength and lower sensitivity to cyclic overloads. It is concluded that all the studied UFG materials are more promising compared to CG ones for the manufacture of medical devices for various purposes, which experience various static and cyclic loads during operation.

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Funding

1. Russian Science Foundation - 20-69-47059
2. Russian Science Foundation - 20-63-47027