The effects of austenite phase deformation on microstructure and magnetic properties in Fe–13.4%Mn–5.2%Mo alloy

Kırındı, Talip; Sarı, Uğur

doi:10.1007/s10853-011-5585-6

Cited by 3 publications

(1 citation statement)

References 23 publications

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“…They are specially suitable for applications that require high shape memory stress, i.e., constrained recovery applications; typical examples are pipe joins, rail couplings or pre-stressing reinforcing elements in civil engineering [2][3][4]. The SME in Fe-Mn-Si alloy systems was discovered by Sato et al in 1982 [5]; different alloying elements were subsequently added to improve this SME, making the systems more suitable for structural applications [6][7][8]. Nowadays, research in this field is growing, in order to obtain smart materials which are more competitive for civil engineering purposes.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Thermomechanical Characterization of Fe-28Mn-6Si-5Cr Shape Memory Alloy

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Mariño-Martínez

et al. 2021

Metals

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Iron-based shape memory alloys (SMAs) have been widely studied during the last years, producing new formulations with potential applications in civil engineering. In the present paper, the microstructure and the thermomechanical behavior of the Fe-28Mn-6Si-5Cr memory alloy has been investigated. At room temperature, the presence of e-martensite and g-austenite was confirmed using optical and electron microscopy techniques. The martensitic transformation temperatures (As, Af, Ms, and Mf) were determined by differential scanning calorimetry, together with an X-ray diffraction technique. The use of these techniques also confirmed that this transformation is not totally reversible, depending on the strain degree and the number of thermal cycles. From the kinetics study of the e ® g transformation, the isoconversion curves (transformation degree versus time) were built, which provided the information required to optimize the thermal activation cycle. Tensile tests were performed to characterize the mechanical properties of the studied alloy. These kinds of tests were also performed to assess the shape memory effect, getting a recovery stress of 140 MPa, after a 7.6% pre-strain and a thermal activation up to 160 °C.

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Section: Introductionmentioning

confidence: 99%

Microstructure and Thermomechanical Characterization of Fe-28Mn-6Si-5Cr Shape Memory Alloy

Collazo

Figueroa

Mariño-Martínez

et al. 2021

Metals

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Effect of the High-Temperature Deformation on the M s Temperature in a Low C Martensitic Stainless Steel

Alvarado-Meza

García-Sánchez

Covarrubias-Alvarado³

et al. 2012

J. of Materi Eng and Perform

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Microstructure, Shape Memory Effect, Chemical Composition and Corrosion Resistance Performance of Biodegradable FeMnSi-Al Alloy

et al. 2023

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The medical applications of degradable iron-based biomaterials have been targeted by re-searchers due to their special properties that they present after alloying with various elements and different technological methods of obtaining. Compared to other biodegradable materials, iron-based alloys are designed especially for the low production costs, the non-magnetism obtained by alloying with Mn, and the shape memory effect (SME) following the alloying with Si, which is necessary in medical applications for which it could replace nitinol successfully. Alloying with new elements could improve the mechanical properties, the degradation rate, and the transformation temperatures corresponding to the SME. This paper presents the results from the study of FeMnSi-Al alloy as a biodegradable material. The X-ray diffraction (XRD) method was used to identify the phases formed in the experimental Fe-Mn-Si-Al alloy, and the SME was studied by differential scanning calorimetry (DSC). In vitro tests were performed by immersing the samples in Ringer’s biological solution for different time intervals (1, 3, and 7 days). The chemical composition of the samples, as well as the compounds resulting from the immersion tests, were evaluated by energy dispersive X-ray (EDS). Scanning electron microscopy (SEM) was used for the microstructural analysis and for highlighting the surfaces subjected to contact with the electrolyte solution. The corrosion rate (CR, mm/yr.) was calculated after mass loss, sample surface area, and immersion time (h) (at 37 °C). Samples were subjected to electro-corrosion tests using electrochemical impedance spectroscopy (EIS) and Tafel linear and cyclic potentiometry.

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The effects of austenite phase deformation on microstructure and magnetic properties in Fe–13.4%Mn–5.2%Mo alloy

Cited by 3 publications

References 23 publications

Microstructure and Thermomechanical Characterization of Fe-28Mn-6Si-5Cr Shape Memory Alloy

Microstructure and Thermomechanical Characterization of Fe-28Mn-6Si-5Cr Shape Memory Alloy

Effect of the High-Temperature Deformation on the M s Temperature in a Low C Martensitic Stainless Steel

Microstructure, Shape Memory Effect, Chemical Composition and Corrosion Resistance Performance of Biodegradable FeMnSi-Al Alloy

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