Effect of grain size and texture on pseudoelasticity in Cu–Al–Mn-based shape memory wire

Sutou, Yuji; Omori, Toshihiro; Yamauchi, Kiyoshi; Ono, Noboru; Kainuma, Ryosuke; Ishida, K.

doi:10.1016/j.actamat.2005.05.013

Cited by 257 publications

(140 citation statements)

References 21 publications

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“…Recent findings have shown that the reversibility of certain martensitic transitions can be strongly favored if the grain size d increases reaching values higher than the specimen size D in the so-called "bamboo microstructures". For example, this is the case for Cu based polycrystalline alloys where pseudoelasticity and shape memory effect are enhanced if d/D >1 [5][6][7][8][9]. This interesting effect has also been reported for Fe-Mn-Al-Ni alloys, where better pseudoelastic properties are obtained for bamboo microstructure [1,10].…”

mentioning

confidence: 59%

Effects of B2 nanoprecipitates on the phase stability and pseudoelastic behavior of Fe-Mn-Al-Ni shape memory alloys

Roca

Medina

Sobrero

et al. 2015

MATEC Web of Conferences

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Abstract. Samples of a Fe-Mn36-Al15-Ni7.5 shape memory alloy were subjected to different thermal treatments at 200ºC (namely for 0 min, 10 min, 20 min and 3 h) in order to evaluate the evolution of the coherent precipitates related to the pseudoelastic behavior. After performing the thermal treatments, samples were studied by means of electrical resistivity in experiments aimed at evaluating the effect of precipitation on the martensitic transformation temperatures and at determining the possible effects of thermal cycling. Mechanical tests were performed to measure the degree of pseudoelastic recovery for each thermally treated sample. Evidences of pseudoelastic behavior were found even in samples subjected to a rather short treatment such as 20 min after three thermal cycles. Transmission electron microscopy (TEM) observations were performed in order to identify the distribution and size of B2 nanoprecipitates after the various thermal treatments.

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mentioning

confidence: 59%

Effects of B2 nanoprecipitates on the phase stability and pseudoelastic behavior of Fe-Mn-Al-Ni shape memory alloys

Roca

Medina

Sobrero

et al. 2015

MATEC Web of Conferences

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“…A transition from multi-domain to single-domain transformation morphology is observed as the wire diameter is decreased. We relate the transition from a nucleation-dominated to a monolithic morphology to the ease of Blue circles with diameters larger than 300 µm are large single crystalline Cu-based SMAs [35,68,69]. Details of experimental data can be found in Ref [14].…”

Section: Discussionmentioning

confidence: 99%

Transition from many domain to single domain martensite morphology in small-scale shape memory alloys

Ueland

Schuh

2013

Acta Materialia

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“…As the grain size decreases, the strain constraints increase and the width of martensite plates decrease. As a result, a higher stress is required to form stress induced martensite, leading to reduced recoverable strain [10]. Hence SME and SE decrease with reduced grain size.…”

Section: Superelastic Effect(se)mentioning

confidence: 99%

Influence of minor additions of boron and zirconium on shape memory properties and grain refinement of a Cu-Al-Mn shape memory alloy

Sampath

Mallik

2009

ESOMAT 2009 - 8th European Symposium on Martensitic Transformations

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Abstract. Cu-base alloys with 12.5 wt. % Al and 5 wt. % Mn with different amounts (0.05-2.00 wt.%) of boron or zirconium were prepared by ingot metallurgy route. The alloy ingots were homogenized followed by step quenching so as to obtain a structure that is completely martensitic. They were subsequently characterized by optical emission spectrophotometry, differential scanning calorimetry and optical microscopy. The shape memory and superelastic properties of the alloys were studied by bend and tensile test. The present study brings to light that boron acts as a good grain refiner, resulting in a reduction of about 80% in grain size. While it also increases the transformation temperatures by ~ 10 o C, it decreases the strain recovery by shape memory effect by 4%, and that by superelasticity by ~ 2%. A comparison of the results of the alloy with B addition with that with Zr addition reveals that B is a better grain refiner for Cu-Al-Mn SMAs.

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Effect of grain size and texture on pseudoelasticity in Cu–Al–Mn-based shape memory wire

Cited by 257 publications

References 21 publications

Effects of B2 nanoprecipitates on the phase stability and pseudoelastic behavior of Fe-Mn-Al-Ni shape memory alloys

Effects of B2 nanoprecipitates on the phase stability and pseudoelastic behavior of Fe-Mn-Al-Ni shape memory alloys

Transition from many domain to single domain martensite morphology in small-scale shape memory alloys

Influence of minor additions of boron and zirconium on shape memory properties and grain refinement of a Cu-Al-Mn shape memory alloy

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