Study of precipitate formation in Cu-Al-Ni-Mn-Fe shape memory alloys

S. Stanciu; L. G. Bujoreanu; Burak Özkal; M. Lutfi Öveçoǧlu; Andrei Victor Sandu

Study of precipitate formation in Cu-Al-Ni-Mn-Fe shape memory alloys

S. Stanciu
, L. G. Bujoreanu^*
, Burak Özkal
, M. Lutfi Öveçoǧlu
, Andrei Victor Sandu

^*Bu çalışma için yazışmadan sorumlu yazar

Metalurji ve Malzeme Müh.Böl.

Araştırma sonucu: Dergiye katkı › Makale › bilirkişi

16 Atıf (Scopus)

Özet

The paper analyses the precipitation of γ2 phase within the γ'1 thermally induced martensitic matrix of five Cu-Al-Ni-Fe-Mn shape memory alloys (SMAs), by means of differential scanning calorimetry (DSC) thermograms, optical microscopy (OM) and scanning electron microscopy (SEM). It has been proved that the flat exothermic peaks, occurring during the heating of martensitic specimens, correspond to the formation of γ2 phase precipitates, which are characterized by two specific morphologies, with dendrite arms at about 90° and a120°, respectively. In spite of the presence of γ2 phase precipitates, the occurrence of thermal memory has been emphasized, characterized by shape recovery degrees higher than 96 %.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	1365-1369
Sayfa sayısı	5
Dergi	Journal of Optoelectronics and Advanced Materials
Hacim	10
Basın numarası	6
Yayın durumu	Yayınlandı - Haz 2008

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@article{d76989b9e1d74d828b83a975f128afbd,

title = "Study of precipitate formation in Cu-Al-Ni-Mn-Fe shape memory alloys",

abstract = "The paper analyses the precipitation of γ2 phase within the γ'1 thermally induced martensitic matrix of five Cu-Al-Ni-Fe-Mn shape memory alloys (SMAs), by means of differential scanning calorimetry (DSC) thermograms, optical microscopy (OM) and scanning electron microscopy (SEM). It has been proved that the flat exothermic peaks, occurring during the heating of martensitic specimens, correspond to the formation of γ2 phase precipitates, which are characterized by two specific morphologies, with dendrite arms at about 90° and a120°, respectively. In spite of the presence of γ2 phase precipitates, the occurrence of thermal memory has been emphasized, characterized by shape recovery degrees higher than 96 \%.",

keywords = "Critical temperatures, Martensite, Phase structure, Precipitates, Shape memory alloys",

author = "S. Stanciu and Bujoreanu, \{L. G.\} and Burak {\"O}zkal and {\"O}ve{\c c}oǧlu, \{M. Lutfi\} and Sandu, \{Andrei Victor\}",

year = "2008",

month = jun,

language = "English",

volume = "10",

pages = "1365--1369",

journal = "Journal of Optoelectronics and Advanced Materials",

issn = "1454-4164",

publisher = "National Institute of Optoelectronics",

number = "6",

}

TY - JOUR

T1 - Study of precipitate formation in Cu-Al-Ni-Mn-Fe shape memory alloys

AU - Stanciu, S.

AU - Bujoreanu, L. G.

AU - Özkal, Burak

AU - Öveçoǧlu, M. Lutfi

AU - Sandu, Andrei Victor

PY - 2008/6

Y1 - 2008/6

N2 - The paper analyses the precipitation of γ2 phase within the γ'1 thermally induced martensitic matrix of five Cu-Al-Ni-Fe-Mn shape memory alloys (SMAs), by means of differential scanning calorimetry (DSC) thermograms, optical microscopy (OM) and scanning electron microscopy (SEM). It has been proved that the flat exothermic peaks, occurring during the heating of martensitic specimens, correspond to the formation of γ2 phase precipitates, which are characterized by two specific morphologies, with dendrite arms at about 90° and a120°, respectively. In spite of the presence of γ2 phase precipitates, the occurrence of thermal memory has been emphasized, characterized by shape recovery degrees higher than 96 %.

AB - The paper analyses the precipitation of γ2 phase within the γ'1 thermally induced martensitic matrix of five Cu-Al-Ni-Fe-Mn shape memory alloys (SMAs), by means of differential scanning calorimetry (DSC) thermograms, optical microscopy (OM) and scanning electron microscopy (SEM). It has been proved that the flat exothermic peaks, occurring during the heating of martensitic specimens, correspond to the formation of γ2 phase precipitates, which are characterized by two specific morphologies, with dendrite arms at about 90° and a120°, respectively. In spite of the presence of γ2 phase precipitates, the occurrence of thermal memory has been emphasized, characterized by shape recovery degrees higher than 96 %.

KW - Critical temperatures

KW - Martensite

KW - Phase structure

KW - Precipitates

KW - Shape memory alloys

UR - https://www.scopus.com/pages/publications/46749152310

M3 - Article

AN - SCOPUS:46749152310

SN - 1454-4164

VL - 10

SP - 1365

EP - 1369

JO - Journal of Optoelectronics and Advanced Materials

JF - Journal of Optoelectronics and Advanced Materials

IS - 6

ER -

Study of precipitate formation in Cu-Al-Ni-Mn-Fe shape memory alloys

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