The shape recovery conditions for Fe–Mn–Si alloys: An interplay between martensitic transformation and plasticity

Druker, Ana Velia; Vermaut, Ph.; Malarrı́a, J.

doi:10.1016/j.matchar.2018.03.018

Cited by 22 publications

(5 citation statements)

References 31 publications

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“…In several studies where the presence of pseudoelasticity in the Fe-Mn-Si-Cr system is reported [63][64][65][66][67][68][69], the Cr content is between 4 wt.% and 9 wt.%, which is within the range of the alloys analyzed in the present work. The presence of this element is generally related to its anticorrosive effects [70], but the effect of Cr on pseudoelasticity has not been analyzed.…”

Section: Presence Of Pseudoelasticity In Fe-mn-si-cr Alloyssupporting

confidence: 73%

A Short Review on the Effect of Cr on the fcc–hcp Phase Transition in Fe–Mn-Based Alloys

Guerrero

Roca

Malamud

et al. 2020

Shap. Mem. Superelasticity

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The effect of Cr on the fcc-hcp martensitic transformation in the Fe-Mn-Cr system has been discussed considering different aspects: a) the relative phase stabilities, b) the magnetic order of the fcc phase, c) the structural parameters and volume change between fcc and hcp, d) the driving force of the martensitic transformation and relevant thermodynamics quantities, e) the thermal cycling behavior, and f) the pseudoelastic effect. Particularly, in this work it has been found that when Cr content increases, the effect of cycling on the energy barrier decreases. This may be explained by a small volume change, which could lead to a slighter introduction of plastic deformation during thermal cycling through the martensitic transition.

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Section: Presence Of Pseudoelasticity In Fe-mn-si-cr Alloyssupporting

confidence: 73%

A Short Review on the Effect of Cr on the fcc–hcp Phase Transition in Fe–Mn-Based Alloys

Guerrero

Roca

Malamud

et al. 2020

Shap. Mem. Superelasticity

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“…When the temperature rises above the austenite transformation temperature, the ε-martensite immediately reverse transforms into γ-austenite, while the α′-martensite requires a higher temperature to transform back into γ-austenite, and the deformation induced by it is irreversible [ 38 ]. Figure 10 d depicts the deformation bands formed in the grains under larger stress, which generally contain a higher dislocation density [ 39 ].…”

Section: Resultsmentioning

confidence: 99%

Laser-Directed Energy Deposition of Fe-Mn-Si-Based Shape Memory Alloy: Microstructure, Mechanical Properties, and Shape Memory Properties

Liu,

Yao,

Kang

et al. 2023

Materials

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Fe-Mn-Si shape memory alloys (SMAs) have gained significant attention due to their unique characteristics. However, there remains a gap in the literature regarding the fabrication of these alloys using laser-directed energy deposition (LDED). This study fills this void, investigating the properties of Fe-Mn-Si SMAs produced by LDED. The shape memory performance of as-deposited Fe-Mn-Si SMAs was studied using a tensile method. Alloys underwent different degrees of deformation to assess their shape memory effect. Microstructural evaluations were conducted post-deformation to observe the internal structures of the alloys. The tensile tests revealed that shape recovery rates for deformation levels of 3%, 7%, 11%, and 15% were 68.1%, 44.2%, 31.7%, and 17.6%, respectively. Notably, the maximum recoverable deformation of the LDED-formed Fe-Mn-Si-based shape memory alloy reached 3.49%, surpassing the traditional deformation processing SMAs (<3%). The presence of a significant number of stacking faults was linked to the enhanced shape memory performance. The LDED technique demonstrates promising potential for the fabrication of Fe-Mn-Si SMAs, producing alloys with enhanced shape memory performance compared to traditionally processed SMAs. The study’s findings offer new insights and broaden the applicability of LDED in the field of SMAs.

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“…The small shift in peaks at the α-Fe phase towards greater 2θ angles and the significant reduction in the intensity of the peaks at Mn demonstrated that Mn was dissolved in the α-Fe. The reason for this is that the percentage of the dissolved components was small during the initial stage of MA and because of the insignificant difference between the atomic radii of Fe, Cr, Mn, and Si (Druker et al, 2018). After 40 h of MA, Mn was completely dissolved in the α-Fe phase and the dissolution of Si in α-Fe was more intense.…”

Section: Powder Alloy Characterizationmentioning

confidence: 99%

“…After MA for 40 hrs, only the Fe phase remains in the powder mixture. Since the composition of the equilibrium state is two-phase, it can be inferred that this phase was a supersaturated solid solution (Druker et al, 2018;Kong et al, 2018). The α-Fe is completely phase-shifted to γ-Fe due to mechanical alloying.…”

Section: Powder Alloy Characterizationmentioning

confidence: 99%

Fabrication and characterization of nanostructured Fe–28Mn–6Si–5Cr shape memory alloy

al.¹

2022

Int. j. adv. appl. sci.

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Mechanical alloying and consequent sintering techniques were used to create a bulk alloy of Fe–28Mn–6Si–5Cr from elemental powder. The microstructure and shape memory behavior due to bending deformation were investigated. The majority of α phases that existed at the start of the mechanical alloying process were changed into γ phases by the end of the 40-hour process. The γ phase was essential to achieving shape recovery behavior, which was boosted by mechanical alloying. A stress-induced γ to ε phase transformation occurred at the end of the bending deformation process. Shape recovery was observed after the subsequent heat treatment process due to reverse martensitic ε to γ phase transformation. After mechanical alloying, a grain size of 9.5 nm was attained and a considerable amount of shape recovery was achieved at the end of the recovery heat-treatment process. As a result, we came to the conclusion that combining mechanical alloying with powder metallurgy and then sintering has the potential to synthesize Fe-Mn-Si-Cr shape memory alloy.

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The shape recovery conditions for Fe–Mn–Si alloys: An interplay between martensitic transformation and plasticity

Cited by 22 publications

References 31 publications

A Short Review on the Effect of Cr on the fcc–hcp Phase Transition in Fe–Mn-Based Alloys

A Short Review on the Effect of Cr on the fcc–hcp Phase Transition in Fe–Mn-Based Alloys

Laser-Directed Energy Deposition of Fe-Mn-Si-Based Shape Memory Alloy: Microstructure, Mechanical Properties, and Shape Memory Properties

Fabrication and characterization of nanostructured Fe–28Mn–6Si–5Cr shape memory alloy

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