Effect of Thermomechanical Treatment on Functional Properties of Biodegradable Fe-30Mn-5Si Shape Memory Alloy

Прокошкин, С. Д.; Pustov, Yu. A.; Zhukova, Yulia; Kadirov, Pulat; Dubinskiy, S.; Sheremetyev, V.; Karavaeva, M.

doi:10.1007/s11661-021-06217-5

Cited by 21 publications

(29 citation statements)

References 48 publications

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“…In order to eliminate dendritic segregation, homogenization annealing was carried out at 900 °C for 60 min, followed by water quenching [ 16 ]; hereinafter, this treatment regime is referred to as reference heat treatment (RHT). The chemical composition and its uniformity throughout the ingot were measured by energy-dispersive X-ray spectroscopy using a JSM-6480 LV scanning microscope (JEOL, Eching b. München, Germany) in no less than ten points [ 24 ].…”

Section: Methodsmentioning

confidence: 99%

“…The choice of TMT regimes aimed at creating various structural states of the material based on [ 24 ], as follows: a developed dislocation substructure or a fine-grained recrystallized structure during (a) hot deformation at 600 and 800 °C (true deformation strain e = 0.3), hereinafter designated as HR 600 and HR 800 regimes, respectively; (b) cold deformation ( e = 0.3) with post-deformation annealing at 500 and 600 °C for 30 min, hereinafter designated as CR 500 and CR 600 regimes, respectively. Samples for further preparation were cut by an electrical discharge machine.…”

Section: Methodsmentioning

confidence: 99%

“…Young’s modulus was calculated by regression using the testXpert III program (ZwickRoell, Ulm, Germany), and by the slope of a straight line coinciding with the initial linear section of the load loop deformation diagram to the abscissa axis. In accordance with the DSC data obtained in [ 24 ], the following temperatures for carrying out mechanical tensile tests were selected: 250, 200, 150, 100, and 50 °C, and room temperature. Tests for all experimental temperatures included loading to a strain of 0.05%.…”

Section: Methodsmentioning

confidence: 99%

“…Studies of Fe-(23...30) Mn-5Si alloys (wt %) described in [ 16 , 17 , 24 ] showed the possibility of achieving optimal characteristics by implementing certain regimes of thermal and thermomechanical treatment leading to the rise of biodegradation rate from 0.4 to 0.8 mm/year, the decrease in the elastic modulus from 120 to 97 GPa, and a decrease M s temperature from 70 to 38 °C. The best characteristics were obtained for the Fe-30Mn-5Si alloy [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

“…Given the above and based on the results obtained in [ 16 , 17 , 24 ], the main goal of this work is to study the Fe-30Mn-5Si alloy fatigue behavior features in the initial state (homogenized and quenched) and after thermomechanical treatment (TMT) using mechanical cyclic tests in air and Hanks’ solution, the study of Young’s modulus temperature dependence in the temperature range above and close to the M s to verify the existence of lattice softening effect, which is characteristic of shape memory alloys, and the role of martensitic transformation in corrosion fatigue failure of the alloy.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Thermomechanical Treatment on Structure and Functional Fatigue Characteristics of Biodegradable Fe-30Mn-5Si (wt %) Shape Memory Alloy

et al. 2021

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The Fe-Mn-Si shape memory alloys are considered promising materials for the biodegradable bone implant application since their functional properties can be optimized to combine bioresorbability with biomechanical and biochemical compatibility with bone tissue. The present study focuses on the fatigue and corrosion fatigue behavior of the thermomechanically treated Fe-30Mn-5Si (wt %) alloy compared to the conventionally quenched alloy because this important functionality aspect has not been previously studied. Hot-rolled and water-cooled, cold-rolled and annealed, and conventionally quenched alloy samples were characterized by X-ray diffraction, transmission electron microscopy, tensile fatigue testing in air atmosphere, and bending corrosion fatigue testing in Hanks’ solution. It is shown that hot rolling at 800 °C results in the longest fatigue life of the alloy both in air and in Hanks’ solution. This advantage results from the formation of a dynamically recrystallized γ-phase grain structure with a well-developed dislocation substructure. Another important finding is the experimental verification of Young’s modulus anomalous temperature dependence for the studied alloy system, its minimum at a human body temperature, and corresponding improvement of the biomechanical compatibility. The idea was realized by lowering Ms temperature down to the body temperature after hot rolling at 800 °C.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%