Effects of carbon addition and aging on the shape memory effect of Fe–Mn–Si–Cr–Ni alloys

Wen, Yuhua; Yan, Mi; Li, N

doi:10.1016/j.scriptamat.2003.11.008

Cited by 57 publications

(33 citation statements)

References 8 publications

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“…For example, Tsuzaki et al 9) examined similar alloys to the ones studied here, and concluded that carbon addition improved SME. However, like many other reports, 10,11) the M s of the alloys examined were quite different. In the case of Tsuzaki et al 9) the M s of the carbon-bearing alloy was well above room temperature, 50°C, resulting in one alloy Table 3.…”

Section: Effect Of Interstitials On Shape Memory and Sfpsupporting

confidence: 51%

“…Wen et al 10,11) published 2 papers in 2004 after a solutionizing treatment (1 100°C) and immediate water quenching. They reported the same results as found here, that carbon in solution decreases the shape memory.…”

Section: Effect Of Interstitials On Shape Memory and Sfpmentioning

confidence: 99%

“…These two interstitials have similar austenite stabilizing properties, and are both powerful austenite strengtheners. The effects of C and N on this alloy system have usually been studied with respect to their austenite strengthening capabilities, [9][10][11][12][13][14] and as yet there has not been an integrated investigation that considers the effects of SFE, T N and composition on the SME. Moreover, of the available literature, there is no consensus as to whether interstitial elements have a beneficial or detrimental effect on SME.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Alloying Additions on the SFE, Neel Temperature and Shape Memory Effect in Fe-Mn-Si-based Alloys

et al. 2007

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A range of Fe-Mn-Si-based shape memory alloys has been investigated to examine the interplay of composition, stacking fault probability (SFP) and Neél temperature on the shape memory effect (SME). It has been found that the SFP (inversely proportional to stacking fault energy) showed little correlation to the SME for the range of alloy compositions examined. Further, the Neél temperature was not found to exhibit a significant effect on the SME. The addition of interstitial elements, however, was found to markedly decrease the SME.

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Section: Effect Of Interstitials On Shape Memory and Sfpsupporting

confidence: 51%

Section: Effect Of Interstitials On Shape Memory and Sfpmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Alloying Additions on the SFE, Neel Temperature and Shape Memory Effect in Fe-Mn-Si-based Alloys

et al. 2007

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“…The production of stress induced martensite (ε, hcp) from parent austenite phase (γ, fcc) and the reverse transformation (γ to ε) during the heating cycle are the origins of SME in this alloying system [12][13][14][15][16][17][18]. This non-thermoelastic or semi-thermoelastic conversion occurred by the creation of stacking faults (SFs) due to the movement of the Shockley partial dislocations (a γ /6 <112>) in the parent phase.…”

Section: Introductionmentioning

confidence: 99%

Phase transformation during mechano-synthesis of nanocrystalline/amorphous Fe–32Mn–6Si alloys

Amini

Shamsipoor

Ghaffari

et al. 2013

Materials Characterization

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Mechano-synthesis of Fe-32Mn-6Si alloy by mechanical alloying of the elemental powder mixtures was evaluated by running the ball milling process under an inert argon gas atmosphere. In order to characterize the as-milled powders, powder sampling was performed at predetermined intervals from 0.5 to 192 h. X-ray florescence analyzer, X-ray diffraction, scanning electron microscope, and high resolution transmission electron microscope were utilized to investigate the chemical composition, structural evolution, morphological changes, and microstructure of the as-milled powders, respectively.According to the results, the nanocrystalline Fe-Mn-Si alloys were completely synthesized after 48 h of milling. Moreover, the formation of a considerable amount of amorphous phase during the milling process was indicated by quantitative X-ray diffraction analysis as well as high resolution transmission electron microscopy image and its selected area diffraction pattern. It was found that the α-to-γ and subsequently the amorphous-to-crystalline (especially martensite) phase transformation occurred by milling development. © 2013 Elsevier Inc. All rights reserved. Keywords:Fe-Mn-Si shape memory alloys Mechanical alloyingPhase transformation Nanostructural/amorphous phase Microstructure IntroductionFe-Mn-Si alloys are a class of smart materials due to their suitable shape memory effect (SME), excellent machinability and formability, low cost, good weldability and corrosion resistance, and high strength having several industrial applications such as dampers, pipe couplings, big shape memory devices, hard metals or alloys joining, oxygen blowing nozzles and so on [1][2][3][4][5][6][7][8][9][10][11]. The production of stress induced martensite (ε, hcp) from parent austenite phase (γ, fcc) and the reverse transformation (γ to ε) during the heating cycle are the origins of SME in this alloying system [12][13][14][15][16][17][18]. This non-thermoelastic or semi-thermoelastic conversion occurred by the creation of stacking faults (SFs) due to the movement of the Shockley partial dislocations (a γ /6 <112>) in the parent phase. SFs are suitable sites for nucleation of the martensite phase; eventually, the ε-phase can be formed by their overlap [12,[17][18][19][20][21][22][23].Although induction melting under an argon gas atmosphere is widely utilized to produce Fe-based SMAs, solid-state routes such as mechanical alloying (MA) can be used to produce the alloys in the powder form [24]. During MA, by applying the high energy collision between ball and particles and consequently the repeated cold welding and fracture of the powders, not only is the alloying process attained but also the synthesis of the non-equilibrium structures such as supersaturated solid solutions, nanocrystalline and amorphous structures, and intermetallic compounds is possible [24][25][26][27][28].Recently, MA has been widely used to synthesize nanocrystalline and amorphous SMAs [29][30][31], although limited investigations have been done on Fe-Mn-Si alloys.

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“…Wen et al 23) mention that for their high C alloy that, during aging, car-bides continuously precipitate. The precipitated carbides strengthen the austenitic matrix and suppress the occurrence of permanent slip, thereby improving the SME.…”

Section: )mentioning

confidence: 99%

Effect of Carbon on the Shape Memory Mechanism in FeMnSiCrNi SMAs

et al. 2007

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Fe-Mn-Si-Cr-Ni alloys are Fe-based shape memory alloys (SMA), which make use of the g↔e stress induced martensitic transformation. In the present study, the effect of C addition on the shape memory effect was reported. The characterization of the martensitic transformation and the phase components was carried out by using light optical microscopy, X-ray diffraction, internal friction measurements and transmission electron microscopy (TEM). C is often mentioned to improve the shape memory behaviour. Present results show, however, an opposite effect. It is believed that the relative position between the deformation temperature and the M s temperature for the two alloys is of key importance when looking for an explanation for the presented experimental results. The lower M s temperature for the high C alloy causes more slip and less transformation of the austenite. The microstructural characterization showed a lower amount of formed e martensite during deformation for the high C alloy.

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Effects of carbon addition and aging on the shape memory effect of Fe–Mn–Si–Cr–Ni alloys

Cited by 57 publications

References 8 publications

Effect of Alloying Additions on the SFE, Neel Temperature and Shape Memory Effect in Fe-Mn-Si-based Alloys

Effect of Alloying Additions on the SFE, Neel Temperature and Shape Memory Effect in Fe-Mn-Si-based Alloys

Phase transformation during mechano-synthesis of nanocrystalline/amorphous Fe–32Mn–6Si alloys

Effect of Carbon on the Shape Memory Mechanism in FeMnSiCrNi SMAs

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