The influence of partial cycling on the martensitic transformation kinetics in shape memory alloys

Rodríguez‐Aseguinolaza, Javier; Ruiz‐Larrea, I.; Nó, M.L.; López‐Echarri, A.; Juan, J. San

doi:10.1016/j.intermet.2009.03.001

Cited by 17 publications

(21 citation statements)

References 22 publications

(34 reference statements)

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“…This study would permit to establish the influence of the particle size in the redistribution of the stored elastic energies in these isolated small polycrystalline samples, which in the frame of our thermodynamic model, is considered the physical mechanism underlying in TME [13,15]. This model suggests the presence of TME even in the orthorhombic transformation in fine powdered samples, otherwise not found in large single crystals [14].…”

Section: Introductionmentioning

confidence: 88%

Thermal history effects of Cu–Al–Ni shape memory alloys powder particles compared with single crystals behaviour

Rodríguez‐Aseguinolaza

Ruiz‐Larrea

Nó

et al. 2010

Intermetallics

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Section: Introductionmentioning

confidence: 88%

Thermal history effects of Cu–Al–Ni shape memory alloys powder particles compared with single crystals behaviour

Rodríguez‐Aseguinolaza

Ruiz‐Larrea

Nó

et al. 2010

Intermetallics

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“…Some attempts to describe these phenomena have been published in recent years [16,[41][42][43][44], which attribute the observed behavior to different mechanisms such as changes in the crystal elastic energy, dislocation structure, motion of domains, interfaces interaction, etc.…”

Section: Discussionmentioning

confidence: 99%

Review on the temperature memory effect in shape memory alloys

Wang

2011

International Journal of Smart and Nano Materials

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Shape memory alloys (SMAs) are well known for their unique shape memory effect (SME) and superelasticity (SE) behavior. The SME and SE have been extensively investigated in past decades due to their potential use in many applications, especially for smart materials. The unique effects of the SME and SE originate from martensitic transformation and its reverse transformation. Apart from the SME and SE, SMAs also exhibit a unique property of memorizing the point of interruption of martensite to parent phase transformation. If a reverse transformation of a SMA is arrested at a temperature between reverse transformation start temperature (A s ) and reverse transformation finish temperature (A f ), a kinetic stop will appear in the next complete transformation cycle. The kinetic stop temperature is a 'memory' of the previous arrested temperature. This unique phenomenon in SMAs is called temperature memory effect (TME). The TME can be wiped out by heating the SMAs to a temperature higher than A f . The TME is a specific characteristic of the SMAs, which can be observed in TiNi-based and Cu-based alloys. TME can also occur in the R-phase transformation. However, the TME in the R-phase transformation is much weaker than that in the martensite to parent transformation. The decrease of elastic energy after incomplete cycle on heating procedure and the motion of domain walls have significant contributions to the TME. In this paper, the TME in the TiNi-based and Cu-based alloys including wires, slabs and films is characterized by electronic-resistance, elongation and DSC methods. The mechanism of the TME is discussed.Keywords: temperature memory effect; shape memory alloys IntroductionShape memory alloys (SMAs) have attracted considerable interest as potential candidates for novel engineering and mechanical applications owing to their excellent functional properties, i.e. shape memory effect (SME) and superelasticity (SE) behavior. The unique effects of SME and SE originate from martensitic transformation and its reverse transformation. SMAs also exhibit a unique property of memorizing the point of interruption during transformation from martensite to parent phase. An incomplete thermal cycle upon heating of SMAs (arrested at a temperature T s between austenite transformation start and finish temperatures, A s and A f ) induced a kinetic stop in the next complete thermal cycle. The kinetic stop temperature is closely related to the previous arrested temperature. Therefore, this phenomenon is named the temperature memory effect (TME) [1].

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“…The lack of a TME seems to be a consequence of the short number and large size of the c 0 3 plates in single crystals. Recent studies [24,35] suggest the presence of numerous and small sized plates as an essential requirement for the TME. This microstructure favours a quasicontinuous elastic energy distribution throughout the plates, whilst rearrangements in this distribution after the successive nucleation processes are the basis of the TME.…”

Section: Temperature Memory Effect In the Mixed Transformationmentioning

confidence: 99%

Kinetic effects in the mixed β to β3′+γ3′ martensitic transformation in a Cu–Al–Ni shape

Rodríguez‐Aseguinolaza

Ruiz‐Larrea

Nó

et al. 2010

Acta Materialia

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The influence of partial cycling on the martensitic transformation kinetics in shape memory alloys

Cited by 17 publications

References 22 publications

Thermal history effects of Cu–Al–Ni shape memory alloys powder particles compared with single crystals behaviour

Thermal history effects of Cu–Al–Ni shape memory alloys powder particles compared with single crystals behaviour

Review on the temperature memory effect in shape memory alloys

Kinetic effects in the mixed β to β3′+γ3′ martensitic transformation in a Cu–Al–Ni shape

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