Laser welded superelastic Cu-Al-Mn shape memory alloy wires

J. P. Oliveira; Boyd Panton; Zhi Zeng; Toshihiro Omori; Y. Norman Zhou; R. M. Miranda; F. M. Braz Fernandes

doi:10.1016/j.matdes.2015.10.125

Laser welded superelastic Cu-Al-Mn shape memory alloy wires

J. P. Oliveira, Boyd Panton, Zhi Zeng, Toshihiro Omori, Y. Norman Zhou, R. M. Miranda, F. M. Braz Fernandes

Research output: Contribution to journal › Article › peer-review

55 Citations (Scopus)

Abstract

This paper presents the first study on welding of Cu-based shape memory alloys. The superelastic wires used in the investigation had a nominal composition of Cu-17Al-11.4Mn (at.%). The pulsed Nd: YAG spot welding process altered the original bamboo-likemicrostructure of the base metal to a fusion zonewith fine equiaxed grains. Micro-load-indentation depth analysis revealed that the grain refinement increased the ductility of the fusion zone compared to the base material. Tensile tests did not show any significant difference between base material andwelded specimens, with failure occurring far away from thewelds in the larger grained base metal. Mechanical cycling and superelastic behavior of thewelded joints showed a faster stabilization of the hysteretic response than the base material, which is beneficial for applications where energy absorption is required. The Cu-Al-Mn superelastic alloy had a very high weldability and superior properties compared to other laser welded shape memory alloys, such as NiTi. (C) 2015 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	122-128
Number of pages	7
Journal	Materials & Design
Volume	90
DOIs	https://doi.org/10.1016/j.matdes.2015.10.125
Publication status	Published - 15 Jan 2016

Keywords

Cu-Al-Mn
Shape memory alloys
Laser welding
Superelasticity
CYCLIC DEFORMATION
STRAIN RESPONSE
NITI WIRES
PSEUDOELASTICITY
MICROSTRUCTURE
MARTENSITE
AUSTENITE
BEHAVIOR

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@article{83880041d6464a67b53cef37ac1feabf,

title = "Laser welded superelastic Cu-Al-Mn shape memory alloy wires",

abstract = "This paper presents the first study on welding of Cu-based shape memory alloys. The superelastic wires used in the investigation had a nominal composition of Cu-17Al-11.4Mn (at.%). The pulsed Nd: YAG spot welding process altered the original bamboo-likemicrostructure of the base metal to a fusion zonewith fine equiaxed grains. Micro-load-indentation depth analysis revealed that the grain refinement increased the ductility of the fusion zone compared to the base material. Tensile tests did not show any significant difference between base material andwelded specimens, with failure occurring far away from thewelds in the larger grained base metal. Mechanical cycling and superelastic behavior of thewelded joints showed a faster stabilization of the hysteretic response than the base material, which is beneficial for applications where energy absorption is required. The Cu-Al-Mn superelastic alloy had a very high weldability and superior properties compared to other laser welded shape memory alloys, such as NiTi. (C) 2015 Elsevier Ltd. All rights reserved.",

keywords = "Cu-Al-Mn, Shape memory alloys, Laser welding, Superelasticity, CYCLIC DEFORMATION, STRAIN RESPONSE, NITI WIRES, PSEUDOELASTICITY, MICROSTRUCTURE, MARTENSITE, AUSTENITE, BEHAVIOR",

author = "Oliveira, {J. P.} and Boyd Panton and Zhi Zeng and Toshihiro Omori and Zhou, {Y. Norman} and Miranda, {R. M.} and {Braz Fernandes}, {F. M.}",

note = "JPO and FBF acknowledge funding of CENIMAT/i3N by FEDER funds through the COMPETE 2020 Programme and National Funds through FCT - Portuguese Foundation for Science and Technology under the project UID/CTM/50025/2013. RMM acknowledges funding of UNIDEMI by FEDER funds through the COMPETE 2020 Programme and National Funds through FCT - Portuguese Foundation for Science and Technology under the project UID/EMS/00667/2013. JPO acknowledges FCT/MCTES for funding PhD grant SFRH/BD/85047/2012 and stay at Waterloo University (Canada) through MIDAS Project No 612585 {"}MIDAS-Micro and Nanoscale Design of Thermally Actuating Systems{"} Marie Curie Actions, FP7-PEOPLE-2013-IRSES.",

year = "2016",

month = jan,

day = "15",

doi = "10.1016/j.matdes.2015.10.125",

language = "English",

volume = "90",

pages = "122--128",

journal = "Materials & Design",

issn = "0261-3069",

publisher = "Elsevier",

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TY - JOUR

T1 - Laser welded superelastic Cu-Al-Mn shape memory alloy wires

AU - Oliveira, J. P.

AU - Panton, Boyd

AU - Zeng, Zhi

AU - Omori, Toshihiro

AU - Zhou, Y. Norman

AU - Miranda, R. M.

AU - Braz Fernandes, F. M.

N1 - JPO and FBF acknowledge funding of CENIMAT/i3N by FEDER funds through the COMPETE 2020 Programme and National Funds through FCT - Portuguese Foundation for Science and Technology under the project UID/CTM/50025/2013. RMM acknowledges funding of UNIDEMI by FEDER funds through the COMPETE 2020 Programme and National Funds through FCT - Portuguese Foundation for Science and Technology under the project UID/EMS/00667/2013. JPO acknowledges FCT/MCTES for funding PhD grant SFRH/BD/85047/2012 and stay at Waterloo University (Canada) through MIDAS Project No 612585 "MIDAS-Micro and Nanoscale Design of Thermally Actuating Systems" Marie Curie Actions, FP7-PEOPLE-2013-IRSES.

PY - 2016/1/15

Y1 - 2016/1/15

N2 - This paper presents the first study on welding of Cu-based shape memory alloys. The superelastic wires used in the investigation had a nominal composition of Cu-17Al-11.4Mn (at.%). The pulsed Nd: YAG spot welding process altered the original bamboo-likemicrostructure of the base metal to a fusion zonewith fine equiaxed grains. Micro-load-indentation depth analysis revealed that the grain refinement increased the ductility of the fusion zone compared to the base material. Tensile tests did not show any significant difference between base material andwelded specimens, with failure occurring far away from thewelds in the larger grained base metal. Mechanical cycling and superelastic behavior of thewelded joints showed a faster stabilization of the hysteretic response than the base material, which is beneficial for applications where energy absorption is required. The Cu-Al-Mn superelastic alloy had a very high weldability and superior properties compared to other laser welded shape memory alloys, such as NiTi. (C) 2015 Elsevier Ltd. All rights reserved.

AB - This paper presents the first study on welding of Cu-based shape memory alloys. The superelastic wires used in the investigation had a nominal composition of Cu-17Al-11.4Mn (at.%). The pulsed Nd: YAG spot welding process altered the original bamboo-likemicrostructure of the base metal to a fusion zonewith fine equiaxed grains. Micro-load-indentation depth analysis revealed that the grain refinement increased the ductility of the fusion zone compared to the base material. Tensile tests did not show any significant difference between base material andwelded specimens, with failure occurring far away from thewelds in the larger grained base metal. Mechanical cycling and superelastic behavior of thewelded joints showed a faster stabilization of the hysteretic response than the base material, which is beneficial for applications where energy absorption is required. The Cu-Al-Mn superelastic alloy had a very high weldability and superior properties compared to other laser welded shape memory alloys, such as NiTi. (C) 2015 Elsevier Ltd. All rights reserved.

KW - Cu-Al-Mn

KW - Shape memory alloys

KW - Laser welding

KW - Superelasticity

KW - CYCLIC DEFORMATION

KW - STRAIN RESPONSE

KW - NITI WIRES

KW - PSEUDOELASTICITY

KW - MICROSTRUCTURE

KW - MARTENSITE

KW - AUSTENITE

KW - BEHAVIOR

U2 - 10.1016/j.matdes.2015.10.125

DO - 10.1016/j.matdes.2015.10.125

M3 - Article

VL - 90

SP - 122

EP - 128

JO - Materials & Design

JF - Materials & Design

SN - 0261-3069

ER -

Laser welded superelastic Cu-Al-Mn shape memory alloy wires

Abstract

Keywords

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