Influence of Dynamic Three Point Bending on the Work Hardening Capacity of T105Mn120 Manganese Steel

Bulbuc, V.; Pricop, Bogdan; Maxim, F.; Popa, Mihai; Cimpoeşu, Nicanor; Bujoreanu, Leandru-Gheorghe

doi:10.1007/s11665-018-3658-2

Cited by 6 publications

(3 citation statements)

References 21 publications

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“…The AFM images showed a slight change in the plate dimensions through refinement due to the applied thermomechanical stress. The dimensional change of the plates influences the SME [ 57 , 58 ] and changes the corrosion behavior of the material.…”

Section: Resultsmentioning

confidence: 99%

Investigations on the Degradation Behavior of Processed FeMnSi-xCu Shape Memory Alloys

Roman,

Cimpoeșu,

Pricop

et al. 2024

Nanomaterials

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A new functional Fe-30Mn-5Si-xCu (x = 1.5 and 2 wt%) biomaterial was obtained from the levitation induction melting process and evaluated as a biodegradable material. The degradation characteristics were assessed in vitro using immersion tests in simulated body fluid (SBF) at 37 ± 1 °C, evaluating mass loss, pH variation that occurred in the solution, open circuit potential (OCP), linear and cyclic potentiometry (LP and CP), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and nano-FTIR. To obtain plates as samples, the cast materials were thermo-mechanically processed by hot rolling. Dynamic mechanical analysis (DMA) was employed to evaluate the thermal properties of the smart material. Atomic force microscopy (AFM) was used to show the nanometric and microstructural changes during the hot rolling process and DMA solicitations. The type of corrosion identified was generalized corrosion, and over the first 3–5 days, an increase in mass was observed, caused by the compounds formed at the metal–solution interface. The formed compounds were identified mainly as oxides that passed into the immersion liquid. The degradation rate (DR) was obtained as a function of mass loss, sample surface area and immersion duration. The dynamic mechanical behavior and dimensions of the sample were evaluated after 14 days of immersion. The nanocompounds found on the surface after atmospheric corrosion and immersion in SBF were investigated with the Neaspec system using the nano-FTIR technique.

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Section: Resultsmentioning

confidence: 99%

Investigations on the Degradation Behavior of Processed FeMnSi-xCu Shape Memory Alloys

Roman,

Cimpoeșu,

Pricop

et al. 2024

Nanomaterials

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“…In all vibration cases (1 Hz and 5 Hz), the profile of the samples shows a decrease in plate sizes down to the nanometer range. The change in plate size influences the shape memory properties [61,62] and will change the corrosion behavior of the material.…”

Section: Dynamic Mechanical Analysis (Dma)-strain Sweep (Ss) and Atom...mentioning

confidence: 99%

Influence of Dynamic Strain Sweep on the Degradation Behavior of FeMnSi–Ag Shape Memory Alloys

Roman

Cimpoeșu

Pricop

et al. 2023

JFB

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Iron-based SMAs can be used in the medical field for both their shape memory effect (SME) and biodegradability after a specific period, solving complicated chirurgical problems that are partially now addressed with shape-memory polymers or biodegradable polymers. Iron-based materials with (28–32 wt %) Mn and (4–6 wt %) Si with the addition of 1 and 2 wt % Ag were obtained using levitation induction melting equipment. Addition of silver to the FeMnSi alloy was proposed in order to enhance its antiseptic property. Structural and chemical composition analyses of the newly obtained alloys were performed by X-ray diffraction (confirming the presence of ε phase), scanning electron microscopy (SEM) and energy-dispersive spectroscopy. The corrosion resistance was evaluated through immersion tests and electrolyte pH solution variation. Dynamic mechanical solicitations were performed with amplitude sweep performed on the FeMnSi–1Ag and FeMnSi–2Ag samples, including five deformation cycles at 40 °C, with a frequency of 1 Hz, 5 Hz and 20 Hz. These experiments were meant to simulate the usual behavior of some metallic implants subjected to repetitive mechanical loading. Atomic force microscopy was used to analyze the surface roughness before and after the dynamic mechanical analysis test followed by the characterization of the surface profile change by varying dynamic mechanical stress. Differential scanning calorimetry was performed in order to analyze the thermal behavior of the material in the range of −50–+200 °C. X-ray diffraction and Fourier transform infrared spectroscopy (FTIR) along with Neaspec nano-FTIR experiments were performed to identify and confirm the corrosion compounds (oxides, hydroxides or carbonates) formed on the surface.

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“…Some previous studies on manganese (Hadfield) steel have reported that the DMA strain sweeps that are performed with a three-point-bending specimen holder (DMA-SS-3PB) are able to influence the microstructure that causes the formation of parallel arrays of micro-slip bands with submicronic spacing [ 18 ] and the preferred reordering tendency of carbon atoms [ 19 ]. On the other hand, DMA has been widely used as a measuring technique for the viscoelastic and damping properties of Fe-Mn-Si-based SMAs [ 20 ], while for Fe-28Mn-6Si-5Cr SMA, a strong influence of thermomechanical treatments on the IF values was reported [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Heat Treatment and Dynamic Mechanical Analysis Strain Sweep Effects on the Phase Structure and Morphology of an Fe-28Mn-6Si-5Cr Shape Memory Alloy

Popa

Pricop

et al. 2023

Nanomaterials

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Fe-Mn-Si-based shape memory alloys (SMAs) have been extensively investigated since 1982 for various useful properties that enhance the development of different applications such as anti-seismic dampers for very tall buildings, pipe joints, or rail fasteners. In particular, the Fe-28Mn-6Si-5Cr (mass. %) alloy has been mainly used in vibration mitigation or self-adjustable axial displacement applications. Dynamic mechanical analysis (DMA), performed by strain sweeps (SS), enables the monitoring of the evolution of storage modulus and internal friction variations with increasing strain amplitudes at different constant frequencies and temperatures. Thus, applying dynamic bending with various frequencies and amplitudes that actually represents an isothermal mechanical treatment. In the present paper, an Fe-28Mn-6 Si-5Cr (mass. %) SMA was cast by ingot metallurgy, hot-rolled, and water quenched in order to obtain thermally induced martensite and avoid the occurrence of cooling cracks. The influence of the holding time, between 2 and 10 h, at 1050 °C and the effects of DMA-SS performed at three different frequencies were analyzed by a differential scanning calorimetry, an X-ray diffraction, and a scanning electron and atomic force microscopy. The effects of the holding time and mechanical treatment on the structure and morphology of martensite plates were corroborated with the results of the thermal analysis.

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Influence of Dynamic Three Point Bending on the Work Hardening Capacity of T105Mn120 Manganese Steel

Cited by 6 publications

References 21 publications

Investigations on the Degradation Behavior of Processed FeMnSi-xCu Shape Memory Alloys

Investigations on the Degradation Behavior of Processed FeMnSi-xCu Shape Memory Alloys

Influence of Dynamic Strain Sweep on the Degradation Behavior of FeMnSi–Ag Shape Memory Alloys

Heat Treatment and Dynamic Mechanical Analysis Strain Sweep Effects on the Phase Structure and Morphology of an Fe-28Mn-6Si-5Cr Shape Memory Alloy

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