Cyclic deformation behavior of Mg–SiC nanocomposites on the macroscale and nanoscale

Hübler, Daniela; Winkler, Kai; Riedel, Ralf; Kamrani, Sepideh; Fleck, Claudia

doi:10.1111/ffe.13600

Cited by 4 publications

(3 citation statements)

References 44 publications

(112 reference statements)

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“…An Mg/SiC composite made by powder metallurgy with a SiC particle size of 50 nm has increased the fatigue limit compared to monolithic material. It is attributed to the higher grain boundary acting as an obstacle to dislocation and preventing them from moving [73]. The raised yield strength and ultimate strength of the composite sample also lead to a later onset of plastic deformation and crack initiation.…”

Section: Resultsmentioning

confidence: 99%

Corrosion fatigue behaviour of electrospun PCL/HA coated magnesium biocomposites

Shamsi,

Sedighi

2023

Surface Engineering

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Magnesium implants are susceptible to premature failure due to corrosion and cyclic loading within the body. Composite fibre coatings are effective at reducing corrosion in magnesium materials. In this study, an Mg/HA composite was fabricated, and microscopic and mechanical characterisation was performed. The samples were then electrospun with PCL/ 2.5%HA fibres, and corrosion behaviour was explored by immersion tests. Finally, rotary bending fatigue tests in air and SBF environments were conducted. According to the findings, the Mg/2.5%HA and coated Mg/2.5%HA samples can withstand more than 1 million cycles under 60 MPa. Compared to pure Mg, Mg/2.5%HA has better corrosion and corrosion fatigue resistance. Furthermore, a PCL/2.5%HA fibre coating can increase the corrosion fatigue resistance of Mg/2.5%HA as a result of the polymer scaffold, passive protective layer, and apatite adsorption capability. Results suggest that Mg/2.5%HA composites coated with PCL/2.5%HA fibres are potentially suitable for use in orthopaedic biomaterials.

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Section: Resultsmentioning

confidence: 99%

Corrosion fatigue behaviour of electrospun PCL/HA coated magnesium biocomposites

Shamsi,

Sedighi

2023

Surface Engineering

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“…The same approach was applied to fatigue tests on Mg-SiC nanocomposites with. [34] In summary, cyclic nanoindentation is a promising method to characterize the local fatigue behavior of a wide variety of materials. The main advantages of the nanoindentation method are the precision and the high resolution of the force-depth signals in the range of micro-Newtons and nanometers.…”

Section: Introductionmentioning

confidence: 99%

Cyclic Nanoindentation for Local High Cycle Fatigue Investigations: A Methodological Approach Accounting for Thermal Drift

et al. 2023

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Cyclic nanoindentation allows characterizing the influence of single phases and their interactions on fatigue mechanisms. Herein, a method for high cycle fatigue testing by nanoindentation is presented. By combining high‐ and low‐frequency indentation modes, high cycle numbers are achieved while obtaining sufficient data points to reconstruct force–displacement hysteresis loops. A challenge is the stochastic course of thermal drift which is addressed by measuring drift rate in regular low‐force holding segments. Drift rates are used to correct the displacement values, yielding reproducible cyclic deformation data as it is shown for two very different materials, a ductile metal and a brittle ceramic.

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“…[26] To the best of our knowledge, there are only two reports so far on cyclic nanoindentation fatigue of metals up to a much higher maximum cycle number of 10 5 . [27,28] The tests performed on cross sections of struts extracted from A356.0 aluminum alloy open-cell foam [27] and of Mg-SiC nanocomposites [28] showed significant influences of the phase composition in a micrometer-sized interaction volume below the indent on the cyclic deformation behavior.…”

Section: Introductionmentioning

confidence: 99%

Influence of α‐Precipitate Orientation and Distribution on the Deformation Behavior of the Additively Manufactured Metastable β‐Titanium Alloy Ti‐5553 Assessed by Cyclic Nanoindentation

Alves Alcântara,

Fleck

2023

Adv Eng Mater

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The metastable β‐titanium alloy Ti‐5Al‐5V‐5Mo‐3Cr (Ti‐5553) has recently found growing interest as medical implant material due to its advantageous mechanical properties when compared to the up‐to‐date standard alloys. Besides biocompatibility, implant materials need to exhibit sufficient fatigue resistance. In this study, we apply cyclic nanoindentation up to a maximum cycle number of 105 to elucidate the influence of the local phase distribution on the cyclic deformation behavior of Ti‐5553, made by laser powder bed fusion of metals (LPBF‐M), in the (α+β)‐solution annealed state. By combining the localized cyclic mechanical loading and high‐resolution transmission electron microscopy, we unravel the influence of the presence and orientation of αp‐precipitates within the β‐grains on the cyclic deformation behavior and mechanisms. αp‐phase orientation and distribution significantly contribute to the effectiveness of the precipitates as barriers to dislocation motion. A high density and trapping of dislocations are observed at α/β‐interfaces. The occurrence and size of the pile‐up surrounding the indents are correlated with the cyclic deformation behavior, and, thus, with the presence of αp‐precipitates. The gained improved knowledge of the phase‐dependent deformation behavior helps us to better understand the fatigue performance of this alloy also on the macro‐scale.This article is protected by copyright. All rights reserved.

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Cyclic deformation behavior of Mg–SiC nanocomposites on the macroscale and nanoscale

Cited by 4 publications

References 44 publications

Corrosion fatigue behaviour of electrospun PCL/HA coated magnesium biocomposites

Corrosion fatigue behaviour of electrospun PCL/HA coated magnesium biocomposites

Cyclic Nanoindentation for Local High Cycle Fatigue Investigations: A Methodological Approach Accounting for Thermal Drift

Influence of α‐Precipitate Orientation and Distribution on the Deformation Behavior of the Additively Manufactured Metastable β‐Titanium Alloy Ti‐5553 Assessed by Cyclic Nanoindentation

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