Factors affecting recovery stress in Fe–Mn–Si–Cr–Ni–C shape memory alloys

Wang, C.P.; Wen, Yuhua; Peng, Huabei; Xu, Dinghong; Li, N.

doi:10.1016/j.msea.2010.10.068

Cited by 40 publications

(15 citation statements)

References 20 publications

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“…Austenitic matrix can be strongly strengthened by the addition of interstitial atoms, such as carbon and nitrogen. Accordingly, some studies investigated the effect of carbon or nitrogen on SME in Fe – Mn – Si‐based SMAs . However, these results are in contradiction with each other, as shown in Table .…”

Section: Approaches For Improving Recovery Strains In Polycrystallinementioning

confidence: 96%

“…In 1990, Otsuka et al further developed stainless Fe – Mn – Si–Cr–(Ni) SMAs, such as Fe–28Mn–6Si–5Cr, Fe–20Mn–5Si–8Cr–5Ni, and Fe–16Mn–5Si–12Cr–5Ni . Furthermore, effects of other alloying elements such as interstitial atoms, rare earth elements, copper, and cobalt on SME were investigated in the Fe – Mn – Si‐based SMAs. In addition to the SME, a lot of researches on factors influencing the recovery stress of Fe – Mn – Si‐based SMAs have also been done .…”

Section: Role Of Si In Achieving Large Recovery Strains In Fe–mn–si‐bmentioning

confidence: 99%

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Key Factors Achieving Large Recovery Strains in Polycrystalline Fe–Mn–Si‐Based Shape Memory Alloys: A Review

et al. 2017

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Fe-Mn-Si-based shape memory alloys are the most favorable for largescale applications owing to low cost, good workability, good machinability, and good weldability. However, polycrystalline Fe-Mn-Si-based shape memory alloys have low recovery strains of only 2-3% after solution treatment, although monocrystalline ones reach a large recovery strain of %9%. This review gives an overview of the improvement of recovery strains for polycrystalline Fe-Mn-Si-based shape memory alloys. It is proposed that two fundamental aspects, that is, composition design and microstructure design, shall be satisfied for obtaining large recovery strains of above 6%. Alloying compositions determining the ceiling of recovery strains shall follow three guidelines: (i) Si content is 5-6 wt%; (ii) 20 wt% Mn 32 wt%; (iii) addition of elements strongly strengthening austenite matrix. Microstructure design includes coarsening austenitic grains and reducing twin boundaries as far as possible together with introducing a high density of stacking faults and second phases of strengthening austenite.

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Section: Approaches For Improving Recovery Strains In Polycrystallinementioning

confidence: 96%

Section: Role Of Si In Achieving Large Recovery Strains In Fe–mn–si‐bmentioning

confidence: 99%

Key Factors Achieving Large Recovery Strains in Polycrystalline Fe–Mn–Si‐Based Shape Memory Alloys: A Review

et al. 2017

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“…Plastic deformation, as with other shape memory properties, can supersede this process. Therefore, methods that increase the strength of the alloy will also tend to increase the recovery stress, such as precipitate strengthening (aging effects), grain refinement, alloying, thermomechanical processing, and other factors [20][21][22][23]. With the recent advent of high strength, high-temperature SMAs, stress recovery is one area that to date has not been assessed.…”

Section: Introductionmentioning

confidence: 99%

Constant-Strain Thermal Cycling of a Ni50.3Ti29.7Hf20 High-Temperature Shape Memory Alloy

Benafan

Noebe

Halsmer

et al. 2016

Shap. Mem. Superelasticity

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The effect of various pre-straining routines on the recovery stresses of a Ni-rich Ni 50.3 Ti 29.7 Hf 20 hightemperature shape memory alloy was investigated in tension and compression. The recovery stresses, obtained by means of constant-strain thermal cycling, were evaluated after isothermal (up to ±2 % applied strain at room temperature) or after isobaric thermal cycling at stress levels between ±100 and 400 MPa. The material exhibited high force generation capability with recovery stresses of nearly 1.5 GPa on the first cycle under particular pre-strain conditions. The recovery stresses are shown to decay during subsequent cycles using an upper cycle temperature of 300°C with a saturated stress level nearing 1.1 GPa in compression.

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“…Since Sato et al 1. found that single crystal FeMnSi alloys exhibit an excellent shape memory effect (SME) in 1982, FeMnSi based shape memory alloys (SMAs) have attracted much attention as a possible candidate to substitute expensive Ti–Ni based alloys because of their low‐cost, good workability, good weldability, and good machinability 2–27. However, the SME of ordinary polycrystalline FeMnSi based SMAs not subjected to any specific treatment is poor, whose recovery strain is about 2% except single crystals or thin foil specimens 1, 13.…”

mentioning

confidence: 99%

Effects of Thermally Induced Cyclic γ ↔ ε Transformation on Shape Memory Effect of a Quenched FeMnSiCrNi Alloy

Yang

Peng

et al. 2013

Adv Eng Mater

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The effects of thermally induced cyclic g $ e transformation on microstructures and shape memory effect (SME) are investigated in a quenched Fe14Mn5.5Si8.0Cr5.0Ni alloy. The results show that the annealing at 773 K remarkably improves the SME in the quenched alloy. One thermal cycling between 290 and 773 K remarkably increases the SME, but the further thermal cycling hardly improves the SME. The reason is that the amount of thermal e martensite remarkably reduces after annealing at 773 K, but it hardly changes with the further increase of thermal cycling between 290 and 773 K. The pre-existing thermal e martensite not only prevents the occurrence of stress-induced e martensitic transformation but also promotes the formation of a 0 martensite. ADVANCED ENGINEERING MATERIALS 2013, 15, No. 8

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Factors affecting recovery stress in Fe–Mn–Si–Cr–Ni–C shape memory alloys

Cited by 40 publications

References 20 publications

Key Factors Achieving Large Recovery Strains in Polycrystalline Fe–Mn–Si‐Based Shape Memory Alloys: A Review

Key Factors Achieving Large Recovery Strains in Polycrystalline Fe–Mn–Si‐Based Shape Memory Alloys: A Review

Constant-Strain Thermal Cycling of a Ni50.3Ti29.7Hf20 High-Temperature Shape Memory Alloy

Effects of Thermally Induced Cyclic γ ↔ ε Transformation on Shape Memory Effect of a Quenched FeMnSiCrNi Alloy

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