A Novel Training‐Free Cast FeMnSiCrNi Shape Memory Alloy Based on Formation of Martensite in a Domain‐Specific Manner

Wen, Yuhua; Peng, Huabei; Wang, Chaoping; Yu, Qinxu; Li, Ning

doi:10.1002/adem.201000200

Cited by 28 publications

(12 citation statements)

References 34 publications

(92 reference statements)

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“…Tel. : +54-341-4853200; fax: +54-341-4218834 E-mail address: druker@ifir-conicet.gov.ar investigations have followed, for example Sato et al (1984Sato et al ( , 1986, Otsuka et al (1990), Watanabe et al (1993), Gu et al(1994), Kajiwara et al (1999Kajiwara et al ( , 2001, Wang et al(2001), Baruj et al (2004), Stanford and Dunne (2006), Wen et al (2010Wen et al ( , 2011, Min et al (2012). The shape memory effect (SME) is due to a reversible (austenite, FCC) (martensite, HCP) martensitic transformation that is carried out by the selective movement of a/6 [112] Shockley partial dislocations belonging to a single variant, on the {111} planes of the austenite.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Manufacturing Process on the Texture and the Fraction of Stress-induced Martensite in an Fe-Mn-Si-Cr-Ni Shape Memory Alloy

Druker¹,

Fuster²,

Isola³

et al. 2015

Procedia Materials Science

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Fe-Mn-Si based alloys exhibit the shape memory effect (SME) through a (FCC) (HCP) stress-induced martensitic transformation. Studies carried out with single crystals have shown that the extent of shape recovery depends on the crystal orientation: it is nearly absent if the stress acts along the [001] direction and almost perfect when applied in the [414] direction. Therefore, certain crystallographic textures in polycrystals may contribute to better shape recovery with less applied stress. On the other hand, the texture is a consequence of the thermal and mechanical material processing history. This study analyzes how the particular forming process and the consequent texture development affects the amount of stress-induced martensite in an Fe-15Mn-5Si-9Cr-5Ni shape memory alloy. Besides determining the quantity of martensite produced, we measured the critical transformation temperatures and analyzed the effect of the manufacturing procedures on the SME properties.

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Section: Introductionmentioning

confidence: 99%

Effect of the Manufacturing Process on the Texture and the Fraction of Stress-induced Martensite in an Fe-Mn-Si-Cr-Ni Shape Memory Alloy

Druker¹,

Fuster²,

Isola³

et al. 2015

Procedia Materials Science

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“…Therefore, we can expect that a larger RS will be obtained in cast Fe-Mn-Sibased SMSs. In fact, recently we attained a high bending RS of 6.4% in a cast and annealed Fe-18Mn-5.5Si-9.5Cr-4Ni steel with lath ferrite 35 . In this paper, we ascribed this result to the grain subdivision effect created by the residual lath ferrite.…”

Section: Evolution Of Tbs After Deformation and Recovery Annealingmentioning

confidence: 95%

Large recovery strain in Fe-Mn-Si-based shape memory steels obtained by engineering annealing twin boundaries

et al. 2014

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Shape memory alloys are a unique class of materials that can recover their original shape upon heating after a large deformation. Ti-Ni alloys with a large recovery strain are expensive, while low-cost conventional processed Fe-Mn-Si-based steels suffer from a low recovery strain (o3%). Here we show that the low recovery strain results from interactions between stress-induced martensite and a high density of annealing twin boundaries. Reducing the density of twin boundaries is thus a critical factor for obtaining a large recovery strain in these steels. By significantly suppressing the formation of twin boundaries, we attain a tensile recovery strain of 7.6% in an annealed cast polycrystalline Fe-20.2Mn-5.6Si-8.9Cr-5.0Ni steel (weight%). Further attractiveness of this material lies in its low-cost alloying components and simple synthesis-processing cycle consisting only of casting plus annealing. This enables these steels to be used at a large scale as structural materials with advanced functional properties.

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“…The color etching solution comprised 1.2% K 2 S 2 O 5 and 0.5% NH 4 HF 2 in water. In the color optical micrographs γ appears brown, α ′ martensite appears as dark, and ε martensite as white except that thin ε plate appear as dark lines 32. The amount of thermal ε martensite was statistically analyzed based on 20 color optical micrographs.…”

Section: Methodsmentioning

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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A Novel Training‐Free Cast FeMnSiCrNi Shape Memory Alloy Based on Formation of Martensite in a Domain‐Specific Manner

Cited by 28 publications

References 34 publications

Effect of the Manufacturing Process on the Texture and the Fraction of Stress-induced Martensite in an Fe-Mn-Si-Cr-Ni Shape Memory Alloy

Effect of the Manufacturing Process on the Texture and the Fraction of Stress-induced Martensite in an Fe-Mn-Si-Cr-Ni Shape Memory Alloy

Large recovery strain in Fe-Mn-Si-based shape memory steels obtained by engineering annealing twin boundaries

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

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