Journal
LETTERS ON MATERIALS
Volume 12, Issue 4, Pages 493-498Publisher
RUSSIAN ACAD SCIENCES, INST METALS SUPERPLASTICITY PROBLEMS
DOI: 10.22226/2410-3535-2022-4-493-498
Keywords
equal-cannel angular pressing; strength; fracture mechanism; materials for medical applications
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Funding
- Russian Science Foundation
- [20-69-47059]
- [20-63-47027]
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This paper investigates the mechanical properties of titanium Grade4, magnesium alloy Mg-Zn-Ca, and corrosion-resistant austenitic steel 08Kh18N9 for medical applications. The study compares the properties of coarse-grained (CG) and ultrafine-grained (UFG) materials produced by severe plastic deformation processing. It is found that the UFG materials have higher strength and lower sensitivity to cyclic overloads. Therefore, UFG materials show promise for the manufacture of medical devices.
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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