Effect of carbon content on mechanism of thermal–mechanical cycling in Fe–Mn–Si–Cr–Ni–C alloys

Wen, Yuhua; Yan, Mi; Li, N.

doi:10.1016/j.matlet.2003.06.012

Cited by 22 publications

(14 citation statements)

References 6 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: 48%

“…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: 48%

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 single M 23 C 6 carbide has also been observed for the Fe-15Mn-5Si-8Cr-4Ni-0.18C and Fe-13.53Mn-4.86Si-8.16Cr-3.82Ni-0.16C alloys. [25][26][27] However, the results shown in Figs. 2, 4, and 5 are the first time to simultaneously observe both -phase and M 23 C 6 carbide in one alloy.…”

Section: Methodsmentioning

confidence: 89%

Effects of Carbon Content and Thermo-Mechanical Treatment on Fe59Mn30Si6Cr5CX (X=0.015–0.1 mass%) Shape Memory Alloys

Yang

Lin

et al. 2008

Mater. Trans.

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Slight amounts of carbon (0:015{0:1 mass%) were added into the Fe-30Mn-6Si-5Cr shape memory alloy. The microstructure, precipitation behaviour and shape memory performance of these Fe 59 Mn 30 Si 6 Cr 5 C X alloys with various thermo-mechanical treatments were investigated. Experimental results show that two particles, the -phase and M 23 C 6 carbide, are observed within the grain-boundary phases. M 23 C 6 carbide only appears in an alloy with high carbon content, but the -phase can form in all alloys with low and high carbon contents. The deformationinduced defects in the 10% pre-deformed specimens are preferential sites for nucleation of precipitates (the -phase and M 23 C 6 carbide) in the following aging treatment. After 550{800 C aging, the rearranged uniform defects and homogeneous precipitates within the grain interior will strengthen the matrix and increase the shape recovery ability. After 850{900 C aging, both the uniform defects and homogeneous precipitates disappear due to recrystallization, and hence the specimen's shape recovery ratios are significantly reduced.

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“…[1] However, only 2 to 3 pct recovery strain is attained in ordinary polycrystalline-processed Fe-Mn-Si-based alloys without special treatment. [4][5][6] There are three kinds of special treatment-training, [7][8][9] thermomechanical, [5,10,11] and ausforming [12,13] -that improve the recovery strain of polycrystalline-processed Fe-Mn-Si SMAs to 4 to 5 pct. The preceding treatments not only increase the production cost, but also make it difficult to fabricate the components with complicated shape.…”

mentioning

confidence: 99%

A Novel Training-Free Processed Fe-Mn-Si-Cr-Ni Shape Memory Alloy Undergoing δ → γ Phase Transformation

Peng

Wang

Du³

et al. 2016

Metall Mater Trans A

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We not only suppress the formation of twin boundaries but also introduce a high density of stacking faults by taking advantage of d fi c phase transformation in a processed Fe-19.38Mn-5.29Si-8.98Cr-4.83Ni shape memory alloy. As a result, its shape memory effect is remarkably improved after heating at 1533 K (1260°C) (single-phase region of d ferrite) and air cooling due to d fi c phase transformation.Low-cost Fe-Mn-Si-based shape memory alloys (SMAs), possessing one-way shape memory effect, have attracted much attention for several decades as a possible alternative to the expensive Ti-Ni-based SMAs. [1][2][3][4][5][6] A large recovery strain of 9 pct has been reported in a single-crystalline Fe-30Mn-1Si alloy. [1] However, only 2 to 3 pct recovery strain is attained in ordinary polycrystalline-processed Fe-Mn-Si-based alloys without special treatment. [4][5][6] There are three kinds of special treatment-training, [7][8][9] thermomechanical, [5,10,11] and ausforming [12,13] -that improve the recovery strain of polycrystalline-processed Fe-Mn-Si SMAs to 4 to 5 pct. The preceding treatments not only increase the production cost, but also make it difficult to fabricate the components with complicated shape. Recently, we manufactured a novel training-free cast Fe-20.2Mn-5.6Si-8.9Cr-5.0Ni alloy by simple synthesis processing, consisting only of casting plus annealing, and made a breakthrough to attain a tensile recovery strain of 7.6 pct in this cast alloy. [14] Nevertheless, there are still shortcomings for cast alloys as compared with processed alloys, i.e., lower recovery stress and worse mechanical properties. Thus, we raise an issue regarding how to obtain training-free processed Fe-Mn-Si-based SMAs.Recently, we investigated the interaction between twin boundaries and stress-induced e martensite in Fe-MnSi-based SMAs and found that this interaction not only suppresses the stress-induced e martensitic transformation, but also severely distorts the twin interfaces. [14] As a result, a high density of twin boundaries results in a poor shape memory effect in processed Fe-Mn-Si-based SMAs, and a good shape memory effect could be obtained by inhibiting the formation of twin boundaries. Furthermore, Kajiwara indicated that a high density of stacking faults is beneficial to obtaining a good shape memory effect for processed Fe-Mn-Si-based SMAs. [5] Indeed, the previously mentioned special treatments that effectively improve the shape memory effect introduce the high density of stacking faults besides reducing the twin boundaries for processed Fe-Mn-Si-based SMAs. [5,8,[13][14][15] Here, we also achieve the purpose of both reducing the twin boundaries and introducing the high density of stacking faults using d fi c phase transformation in a Fe-19.38Mn-5.29Si-8.98Cr-4.83Ni alloy. Therefore, in the present article, a novel training-free processed Fe-Mn-Si-Cr-Ni alloy is developed based on d fi c phase transformation.The ingot of Fe-19.38Mn-5.29Si-8.98Cr-4.83Ni SMA was prepared by induction melting in an argon atmosphere. Thi...

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Effect of carbon content on mechanism of thermal–mechanical cycling in Fe–Mn–Si–Cr–Ni–C alloys

Cited by 22 publications

References 6 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

Effects of Carbon Content and Thermo-Mechanical Treatment on Fe<SUB>59</SUB>Mn<SUB>30</SUB>Si<SUB>6</SUB>Cr<SUB>5</SUB>C<I><SUB>X</SUB></I> (<I>X</I>=0.015–0.1 mass%) Shape Memory Alloys

A Novel Training-Free Processed Fe-Mn-Si-Cr-Ni Shape Memory Alloy Undergoing δ → γ Phase Transformation

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Effect of carbon content on mechanism of thermal–mechanical cycling in Fe–Mn–Si–Cr–Ni–C alloys

Cited by 22 publications

References 6 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

Effects of Carbon Content and Thermo-Mechanical Treatment on Fe<SUB>59</SUB>Mn<SUB>30</SUB>Si<SUB>6</SUB>Cr<SUB>5</SUB>C<I><SUB>X</SUB></I> (<I>X</I>=0.015&ndash;0.1 mass%) Shape Memory Alloys

A Novel Training-Free Processed Fe-Mn-Si-Cr-Ni Shape Memory Alloy Undergoing δ → γ Phase Transformation

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Effects of Carbon Content and Thermo-Mechanical Treatment on Fe<SUB>59</SUB>Mn<SUB>30</SUB>Si<SUB>6</SUB>Cr<SUB>5</SUB>C<I><SUB>X</SUB></I> (<I>X</I>=0.015–0.1 mass%) Shape Memory Alloys