Texture evolution during annealing of Ni-Ti shape memory alloy

Francisco Manuel Braz Fernandes; A. S. Paula; J. Canejo; Karimbi Koosappa Mahesh; Rui Jorge Cordeiro Silva; R. M. S. Martins; A. M. A. Cardoso; Norbert Schell

Texture evolution during annealing of Ni-Ti shape memory alloy

Francisco Manuel Braz Fernandes, A. S. Paula, J. Canejo, Karimbi Koosappa Mahesh, Rui Jorge Cordeiro Silva, R. M. S. Martins, A. M. A. Cardoso, Norbert Schell

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Anisotropy of the shape recovery associated with shape memory effect strongly depends on the present type of preferential orientation, as well as the ‘strength' of the texture. This paper reports the results obtained by the in-situ study of texture evolution during the annealing process in Tirich Ni-Ti Shape Memory Alloys (SMAs) with different thermal and mechanical histories. For this purpose, a Be-dome furnace installed into a 6-circle goniometer at the BM20 beamline (ROBL-CRG) at the ESRF (Grenoble) has been used. It is shown that there is a significant change in the preferential orientation of B2 phase, with the change in microstrain/coherence domain size, as a function of annealing temperature. This effect is also observed in the B19' phase after cooling. The α-fiber II (austenite texture - <110>||RD ({111}<110>-{110}<110>) was present in the as-received alloy, but only up to 400ºC. The evolution of {111}<110> austenite texture component is quite clear for annealing temperatures above 400ºC.

Original language	English
Title of host publication	SMST-2004
Subtitle of host publication	Proceedings International Conference on Shape Memory and Superelastic Technologies: October 3-7, 2004, Kurhaus Baden-Baden, Baden-Baden, Germany
Editors	Matthias Mertmann
Place of Publication	Ohio
Publisher	ASM International
Pages	45-50
Number of pages	6
ISBN (Print)	0-87170-834-5
Publication status	Published - Apr 2006
Event	International Conference on Shape Memory and Superelastic Technologies (SMST-2004) - Kurhaus Baden-Baden, Baden-Baden, Germany Duration: 3 Oct 2004 → 7 Oct 2004

Conference

Conference	International Conference on Shape Memory and Superelastic Technologies (SMST-2004)
Abbreviated title	SMST-2004
Country/Territory	Germany
City	Baden-Baden
Period	3/10/04 → 7/10/04

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Braz Fernandes, F. M., Paula, A. S., Canejo, J., Mahesh, K. K., Silva, R. J. C., Martins, R. M. S., Cardoso, A. M. A., & Schell, N. (2006). Texture evolution during annealing of Ni-Ti shape memory alloy. In M. Mertmann (Ed.), SMST-2004: Proceedings International Conference on Shape Memory and Superelastic Technologies: October 3-7, 2004, Kurhaus Baden-Baden, Baden-Baden, Germany (pp. 45-50). ASM International.

@inproceedings{4cb7a2f2bb094dca951c9b86fa1c54ac,

title = "Texture evolution during annealing of Ni-Ti shape memory alloy",

abstract = "Anisotropy of the shape recovery associated with shape memory effect strongly depends on the present type of preferential orientation, as well as the {\textquoteleft}strength' of the texture. This paper reports the results obtained by the in-situ study of texture evolution during the annealing process in Tirich Ni-Ti Shape Memory Alloys (SMAs) with different thermal and mechanical histories. For this purpose, a Be-dome furnace installed into a 6-circle goniometer at the BM20 beamline (ROBL-CRG) at the ESRF (Grenoble) has been used. It is shown that there is a significant change in the preferential orientation of B2 phase, with the change in microstrain/coherence domain size, as a function of annealing temperature. This effect is also observed in the B19' phase after cooling. The α-fiber II (austenite texture - <110>||RD ({111}<110>-{110}<110>) was present in the as-received alloy, but only up to 400ºC. The evolution of {111}<110> austenite texture component is quite clear for annealing temperatures above 400ºC.",

keywords = "shape memory alloy, texture",

author = "{Braz Fernandes}, {Francisco Manuel} and Paula, {A. S.} and J. Canejo and Mahesh, {Karimbi Koosappa} and Silva, {Rui Jorge Cordeiro} and Martins, {R. M. S.} and Cardoso, {A. M. A.} and Norbert Schell",

year = "2006",

month = apr,

language = "English",

isbn = "0-87170-834-5",

pages = "45--50",

editor = "Matthias Mertmann",

booktitle = "SMST-2004",

publisher = "ASM International",

note = "International Conference on Shape Memory and Superelastic Technologies (SMST-2004), SMST-2004 ; Conference date: 03-10-2004 Through 07-10-2004",

}

Braz Fernandes, FM, Paula, AS, Canejo, J, Mahesh, KK , Silva, RJC, Martins, RMS, Cardoso, AMA & Schell, N 2006, Texture evolution during annealing of Ni-Ti shape memory alloy. in M Mertmann (ed.), SMST-2004: Proceedings International Conference on Shape Memory and Superelastic Technologies: October 3-7, 2004, Kurhaus Baden-Baden, Baden-Baden, Germany. ASM International, Ohio, pp. 45-50, International Conference on Shape Memory and Superelastic Technologies (SMST-2004), Baden-Baden, Germany, 3/10/04.

Texture evolution during annealing of Ni-Ti shape memory alloy. / Braz Fernandes, Francisco Manuel; Paula, A. S.; Canejo, J. et al.
SMST-2004: Proceedings International Conference on Shape Memory and Superelastic Technologies: October 3-7, 2004, Kurhaus Baden-Baden, Baden-Baden, Germany. ed. / Matthias Mertmann. Ohio: ASM International, 2006. p. 45-50.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Texture evolution during annealing of Ni-Ti shape memory alloy

AU - Braz Fernandes, Francisco Manuel

AU - Paula, A. S.

AU - Canejo, J.

AU - Mahesh, Karimbi Koosappa

AU - Silva, Rui Jorge Cordeiro

AU - Martins, R. M. S.

AU - Cardoso, A. M. A.

AU - Schell, Norbert

PY - 2006/4

Y1 - 2006/4

N2 - Anisotropy of the shape recovery associated with shape memory effect strongly depends on the present type of preferential orientation, as well as the ‘strength' of the texture. This paper reports the results obtained by the in-situ study of texture evolution during the annealing process in Tirich Ni-Ti Shape Memory Alloys (SMAs) with different thermal and mechanical histories. For this purpose, a Be-dome furnace installed into a 6-circle goniometer at the BM20 beamline (ROBL-CRG) at the ESRF (Grenoble) has been used. It is shown that there is a significant change in the preferential orientation of B2 phase, with the change in microstrain/coherence domain size, as a function of annealing temperature. This effect is also observed in the B19' phase after cooling. The α-fiber II (austenite texture - <110>||RD ({111}<110>-{110}<110>) was present in the as-received alloy, but only up to 400ºC. The evolution of {111}<110> austenite texture component is quite clear for annealing temperatures above 400ºC.

AB - Anisotropy of the shape recovery associated with shape memory effect strongly depends on the present type of preferential orientation, as well as the ‘strength' of the texture. This paper reports the results obtained by the in-situ study of texture evolution during the annealing process in Tirich Ni-Ti Shape Memory Alloys (SMAs) with different thermal and mechanical histories. For this purpose, a Be-dome furnace installed into a 6-circle goniometer at the BM20 beamline (ROBL-CRG) at the ESRF (Grenoble) has been used. It is shown that there is a significant change in the preferential orientation of B2 phase, with the change in microstrain/coherence domain size, as a function of annealing temperature. This effect is also observed in the B19' phase after cooling. The α-fiber II (austenite texture - <110>||RD ({111}<110>-{110}<110>) was present in the as-received alloy, but only up to 400ºC. The evolution of {111}<110> austenite texture component is quite clear for annealing temperatures above 400ºC.

KW - shape memory alloy

KW - texture

M3 - Conference contribution

SN - 0-87170-834-5

SP - 45

EP - 50

BT - SMST-2004

A2 - Mertmann, Matthias

PB - ASM International

CY - Ohio

T2 - International Conference on Shape Memory and Superelastic Technologies (SMST-2004)

Y2 - 3 October 2004 through 7 October 2004

ER -

Texture evolution during annealing of Ni-Ti shape memory alloy

Abstract

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