A manufacturing process for shaft and pipe couplings of Fe–Mn–Si–Ni–Cr shape memory alloys

Druker, Ana Velia; Perotti, A.; Esquivel, Isidro Gabriel; Malarrı́a, J.

doi:10.1016/j.matdes.2013.11.032

Cited by 50 publications

(20 citation statements)

References 25 publications

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“…From TEM micrographs presented in Section 4.1, and in previous works, we have found that the PP crystallites spread not only along austenite and ferrite grain boundaries but are also present within the grains [23,24].…”

Section: X-ray Diffraction Patternssupporting

confidence: 55%

“…Vickers indentations vary greatly, which indicates an important hardness difference between the two phases. The measured values were HV 315 and 990, respectively [24]. Fig.…”

Section: X-ray Analysismentioning

confidence: 90%

“…Microscopic analysis showed that the precipitates were distributed within the grains and in the boundaries. More recently, we presented a manufacturing process for shaft and pipe couplings of Fe-Mn-SiNi-Cr SMAs [24]. We addressed the formability and weldability of sheets rolled at 800°C followed by annealing at 650°C, and investigated how welding affects the mechanical and shape memory properties.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of phases in an Fe–Mn–Si–Cr–Ni shape memory alloy processed by different thermomechanical methods

Fuster

Druker

Baruj

et al. 2015

Materials Characterization

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Section: X-ray Diffraction Patternssupporting

confidence: 55%

“…Vickers indentations vary greatly, which indicates an important hardness difference between the two phases. The measured values were HV 315 and 990, respectively [24]. Fig.…”

Section: X-ray Analysismentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Characterization of phases in an Fe–Mn–Si–Cr–Ni shape memory alloy processed by different thermomechanical methods

Fuster

Druker

Baruj

et al. 2015

Materials Characterization

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“…Although a number of studies were conducted with regard to the shape recovery and recovery stress formation in Fe-SMAs from a fundamental perspective [20][21][22][23][24], several practical issues were not considered in the literature. One important issue is the development of the recovery stress under non-ideal restraints during the installing process or the activation of SMA components.…”

Section: Introductionmentioning

confidence: 99%

Recovery stress formation in a restrained Fe–Mn–Si-based shape memory alloy used for prestressing or mechanical joining

Lee

Weber

Leinenbach

2015

Construction and Building Materials

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“…However, they suffer from high processing cost due to low cold workability [1,11]. As an alternative, Fe-Mn-Si based SMAs seem to be more favorable for many applications due to their low cost, good workability, good machinability, and good weldability [14][15][16]. This field has emerged since Sato et al…”

Section: Introductionmentioning

confidence: 99%

Key criterion for achieving giant recovery strains in polycrystalline Fe-Mn-Si based shape memory alloys

Peng

Wang

et al. 2018

Materials Science and Engineering: A

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In this study, it is proposed that coarsening austenitic grains is a key criterion for achieving giant recovery strains in polycrystalline Fe-Mn-Si based shape memory alloys. In order to verify the hypothesis, the relationship between recovery strains and austenitic grain-sizes in cast and processed Fe-Mn-Si based shape memory alloys was investigated. The recovery strain of cast Fe-19Mn-5.5Si-9Cr-4.5Ni alloy with the coarse austenitic grains of 652 μm reached 7.7% while the recovery strain of one with the relatively small austenitic grains of 382 μm was only 5.4%. Moreover, a recovery strain of 5.9%, which is the highest previously published value for solution-treated processed Fe-Mn-Si based shape memory alloys, was obtained by coarsening the austenitic grains through only solution treatment at 1483 K for 360 min in a processed Fe-17Mn-5.5Si-9Cr-5.5Ni-0.12C alloy. However, its recovery strain was still 5.9% after thermo-mechanical treatment consisting of 10% tensile strain at room temperature and annealing at 1073 K for 30 min. This happens because annealing twins play a negative role, refining the austenitic grains, limiting the recovery strains to below 6%. In summary, coarse austenitic grains enable the achievement large recovery strains by two mechanisms. Firstly, the grains are bigger, and consequently there are fewer grain boundaries, and thus their suppressive effects of grain boundaries on stress-induced ε martensitic transformation is reduced. Secondly, coarse austenitic grains are advantageous to introduce  martensite with single orientation and reduce the collisions of different martensite colonies, especially when the deformation strain is large. As such, the ceiling of recovery strains is dependent on the austenitic grain-sizes.

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A manufacturing process for shaft and pipe couplings of Fe–Mn–Si–Ni–Cr shape memory alloys

Cited by 50 publications

References 25 publications

Characterization of phases in an Fe–Mn–Si–Cr–Ni shape memory alloy processed by different thermomechanical methods

Characterization of phases in an Fe–Mn–Si–Cr–Ni shape memory alloy processed by different thermomechanical methods

Recovery stress formation in a restrained Fe–Mn–Si-based shape memory alloy used for prestressing or mechanical joining

Key criterion for achieving giant recovery strains in polycrystalline Fe-Mn-Si based shape memory alloys

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