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Dissertations / Theses on the topic 'Shape memory effect materials'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Richardson, Tara Beth Auad Maria Lujan Schwartz Peter. "Nanoreinforced shape memory polyurethane." Auburn, Ala., 2009. http://hdl.handle.net/10415/1934.

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2

Paine, Jeffrey Steven Nelson. "Multi-functional SMA hybrid composite materials and their applications /." This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06062008-162936/.

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3

Terzak, John Charles. "Modeling of Microvascular Shape Memory Composites." Youngstown State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1389719238.

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4

Turabi, Ali S. "EFFECTS OF MAGNETIC FIELD ON THE SHAPE MEMORY BEHAVIOR OF SINGLE AND POLYCRYSTALLINE MAGNETIC SHAPE MEMORY ALLOYS." UKnowledge, 2015. http://uknowledge.uky.edu/me_etds/58.

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Magnetic Shape Memory Alloys (MSMAs) have the unique ability to change their shape within a magnetic field, or in the presence of stress and a change in temperature. MSMAs have been widely investigated in the past decade due to their ability to demonstrate large magnetic field induced strain and higher frequency response than conventional shape memory alloys (SMAs). NiMn-based alloys are the workhorse of metamagnetic shape memory alloys since they are able to exhibit magnetic field induced phase transformation. In these alloys, martensite and austenite phases have different magnetization behav

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5

Olender, Amanda (Amanda Ross). "Strain rate effects on the behavior of shape memory alloys." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/80901.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2013.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (p. 29-30).<br>by Amanda Olender.<br>S.B.

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6

Ueland, Stian Melhus. "Grain constraint and size effects in shape memory alloy microwires." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/80893.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2013.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (p. 142-147).<br>Shape memory alloys exhibit interesting and useful properties, such as the shape memory effect and superelasticity. Among the many alloy families that have been shown to exhibit shape memory properties the ones based on copper ar

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7

Shukla, Keerti. "The effect of annealing on the microstructure of Cu-Al-Ni-Mn shape memory alloy microwires." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/100889.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 37-38).<br>Shape memory alloys exhibit superelasticity and the shape memory effect by undergoing a diffusionless phase transformation between the austenite and martensite phases. Nickel-titanium alloys are currently the most common material used. However, due to their expensive cost, alternatives such as Cu-based alloys have been investigated. Cu-based alloys have exhibited the shape memory effect and

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8

Feng, Jiawei. "Compatibility and Shape Memory Effect Study of Maleated Ethylene Propylene Copolymer(MAn-g-EPM)/Fatty Acid Blends." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1500514544100023.

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9

Dano, Marie-Laure. "SMA-induced deformations in unsymmetric cross-ply laminates." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-09122009-040504/.

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10

Young, Avery W. "A Study on NiTiSn Low-Temperature Shape Memory Alloys and the Processing of NiTiHf High-Temperature Shape Memory Alloys." Thesis, University of North Texas, 2018. https://digital.library.unt.edu/ark:/67531/metadc1157642/.

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Shape memory alloys (SMAs) operating as solid-state actuators pose economic and environmental benefits to the aerospace industry due to their lightweight, compact design, which provides potential for reducing fuel emissions and overall operating cost in aeronautical equipment. Despite wide applicability, the implementation of SMA technology into aerospace-related actuator applications is hindered by harsh environmental conditions, which necessitate extremely high or low transformation temperatures. The versatility of the NiTi-based SMA system shows potential for meeting these demanding materia

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11

Coughlin, Daniel Robert. "Characterization of Stoichiometric and Aging Effects on NiTiHf High Temperature Shape Memory Alloys." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366210603.

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12

Wornyo, Edem. "Fabrication and characterization of shape memory polymers at small scales." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26714.

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Thesis (Ph.D)--Electrical and Computer Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Gall, Ken; Committee Chair: May, Gary S; Committee Member: Brand, Oliver; Committee Member: Degertekin, F Levent; Committee Member: Milor, Linda S. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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13

Paine, Jeffrey S. "Multi-functional SMA hybrid composite materials and their applications." Diss., Virginia Tech, 1994. http://hdl.handle.net/10919/38219.

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Shape memory alloy (SMA) materials such as nitinol have unique properties associated with the shape recovery effect and the material’s phase changes that have been used in a variety of actuator and sensing applications. By embedding SMA elements into host composite materials, control or modification of the SMA hybrid composite’s structural properties can be accomplished inservice, thereby increasing the hybrid composite’s structural functionality. Previous studies addressed increasing composite materials’ functionality by enabling in-service control of their dynamic response. Utilizing the SMA

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14

Mukhawana, Mantswaveni D. "Effects of thermo-mechanical cycling and aging on quasi-plastic material response exhibited by NiTi shape memory alloys." Thesis, Cape Peninsula University of Technology, 2005. http://hdl.handle.net/20.500.11838/1280.

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Thesis (MTech (Mechanical Engineering))--Cape Peninsula University of Technology, 2005<br>The working characteristics of a shape memory alloy element providing either sensor or actuator capability is specified by the beginning and/or completion temperatures of the actuation (Le. austenitic start and finish temperatures and martensitic start and finish temperatures), the working actuator stroke (i.e. load induced twinned=:>de-twinned martensitic phase transformation also known as quasi-plastic deformation), and the working actuator force (provided by the temperature induced de-twinned mar

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15

Jones, Wendy Michele. "An investigation of the interfacial characteristics of nitinol fibers in a thermoset composite." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-12302008-063746/.

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16

Kaya, Irfan. "SHAPE MEMORY BEHAVIOR OF SINGLE AND POLYCRYSTALLINE NICKEL RICH NICKEL TITANIUM ALLOYS." UKnowledge, 2014. http://uknowledge.uky.edu/me_etds/37.

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NiTi is the most commonly used shape memory alloy (SMA) and has been widely used for bio-medical, electrical and mechanical applications. Nickel rich NiTi shape memory alloys are coming into prominence due to their distinct superelasticity and shape memory properties as compared to near equi-atomic NiTi shape memory alloys. Besides, their lower density and higher work output than steels makes these alloys an excellent candidate for aerospace and automotive industry. Shape memory properties and phase transformation behavior of high Ni-rich Ni54Ti46 (at.%) polycrystals and Ni-rich Ni51Ti49 (at.%

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17

Achuthankutty, Ajith. "Deposition Kinetics of Titanium and Zirconium Diffusion Coatings on Nickel Microwires via Pack Cementation." University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1592133155467387.

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18

Farjam, Nazanin. "Effects of Size and Geometry on the Thermomechanical Properties of Additively-Manufactured NiTi Shape Memory Alloys." University of Toledo / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=toledo153333222254631.

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19

Acar, Emre. "PRECIPITATION, ORIENTATION AND COMPOSITION EFFECTS ON THE SHAPE MEMORY PROPERTIES OF HIGH STRENGTH NiTiHfPd ALLOYS." UKnowledge, 2014. http://uknowledge.uky.edu/me_etds/40.

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NiTiHf high temperature shape memory alloys are attractive due to their high operating temperatures (>100 oC) and acceptable transformation strain compared to NiTi. However, NiTiHf has limitations due to their lack of ductility and low strength, resulting in poor shape memory properties. In this study, Pd has been added to NiTiHf alloys in an attempt to improve their shape memory behavior. A combined approach of quaternary alloying and precipitation strengthening was used. The characterization of a Ni45.3Ti29.7Hf20Pd5 (at. %) polycrystalline alloy was performed in compression after selected ag

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20

Li, Peizhen. "EFFECTS OF TEMPERATURE, ORIENTATION, LOAD LEVEL AND INDENTER SHAPE ON THE INDENTATION RESPONSE OF NITI-BASED SHAPE MEMORY ALLOYS." UKnowledge, 2017. http://uknowledge.uky.edu/me_etds/94.

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Owing the capability of recovering large deformations through reversible phase transformation, shape memory alloys (SMAs) are well-known for their unique behaviors such as shape memory effect (SME) and superelasticity (SE), which can also be characterized by instrumented indentation techniques. Nickel titanium (NiTi) SMAs have been extensively used for nano/micro-indentation studies and widely applied to biomedical and other elaborate medical devices. In this study, indentation responses of NiTi, NiTiHf, NiTiHfPd and NiTiHfCu alloys were investigated using spherical and Berkovich indenters at

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21

Hayashi, Ryoji 1968. "Effects of composition and ausaging on microstructures and magnetic shape memory response of Fe-Ni-Co-Ti alloys." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/50525.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1998.<br>Includes bibliographical references (leaves 65-66).<br>Magnetic Shape-Memory (MSM) materials are a new category of actuator materials with the potential to produce both large actuator strain and rapid response. To explore the possibility of developing MSM materials based on Fe-Ni-Co-Ti alloys, the effects of chemical composition (Co/Ni ratio) and ausaging on microstructure and magnetic shapememory response were studied. A suitable choice of chemical composition and ausaging enabled the fo

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22

Addai, Boateng Anthony. "EFFECT OF GEOMETRY AND MATERIAL ON THE RESPONSE OF A SHAPE MEMORY ALLOY (SMA) EARTHQUAKE DAMPER." Cleveland State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=csu1610745015584522.

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23

Rusinovn, P. O., J. M. Blednova, and E. Y. Balayev. "Formation of Multi-functional TiNi Surface Layers via High-speed Flame Spraying." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35286.

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This paper examines the formation of multisurface layers of a material with shape memory effect characteristics, using high-speed flame spraying of TiNi. The control parameters of the process were analysed and optimized spraying regimes applied in order to ensure the formation of a structure with grain size 30 - 170 nm and adhesion strength greater than 60 MPa. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35286

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24

Esham, Kathryn V. "The Effect of Nanoscale Precipitates on the Templating of Martensite Twin Microstructure in NiTiHf High Temperature Shape Memory Alloys." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1494251602171757.

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25

Zhang, Xiaodong. "Modeling of materials with internal variables using a thermomechanical approach." Thesis, Virginia Tech, 1992. http://hdl.handle.net/10919/45355.

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In this thesis, the thermomechanical approach with internal variables has been thoroughly analyzed. This approach is based on the combination of thermodynamic principles and continuum mechanics. Therefore it reflects the physical essence of constitutive behavior of materials. Based on this approach, a one-dimensional constitutive model for the two-way shape memory effect and a one-dimensional constitutive model for piezoceramics have been developed, respectively. In modeling the two-way shape memory effect, a residual stress σ<sub>re</sub> is introduced as a controlling parameter for the two-

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26

Muhonen, V. (Virpi). "Bone–Biomaterial Interface:the effects of surface modified NiTi shape memory alloy on bone cells and tissue." Doctoral thesis, University of Oulu, 2008. http://urn.fi/urn:isbn:9789514288340.

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Abstract Whenever a foreign material is implanted into a human body an implant–tissue interface area forms between them. In this microenvironment, interactions take place between the implant and the surrounding tissue. The implantation of a biomaterial into tissue results in injury and initiation of the inflammatory response. This host response to biomaterials is an unavoidable series of events that occur when tissue homeostasis is disturbed by the implantation process. In bone tissue, biocompatible implants must initially be capable of strong bone implant contact and subsequently, allow the n

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27

Amalraj, Julian Joyce. "Effect of variable material properties on purely thermal phase transformations in shape memory alloy wires, modeling and experiments." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0020/MQ47001.pdf.

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28

Ding, Bao. "Elaboration of new bio-based vitrimer materials and study of their thermal, mechanical, shape memory, and self-healing properties." Electronic Thesis or Diss., Normandie, 2025. http://www.theses.fr/2025NORMIR09.

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Dans cette étude nous avons développé des matériaux vitrimères bio-sourcés pour explorer leurs applications dans la mémoire de forme, l'auto-réparation et les composites. Les polymères thermodurcissables traditionnels manquent de recyclabilité et de durabilité environnementale, tandis que les vitrimers surmontent ces limites grâce au réarrangement des réseaux de liaisons covalentes dynamiques. En utilisant des oligomères de polyurée non isocyanate (NIPUrea), des réseaux dynamiques avec des liaisons disulfure et imine ont été conçus, et leurs relations structure-performance ont été étudiées. Le

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29

Simon, Rafael Wagner. "Desenvolvimento e caracterização de liga Fe-Mn-Si-Cr-Ni com efeito de memória de forma." Universidade Federal de São Carlos, 2014. https://repositorio.ufscar.br/handle/ufscar/9052.

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Submitted by Ronildo Prado (ronisp@ufscar.br) on 2017-08-22T18:30:41Z No. of bitstreams: 1 DissRWS.pdf: 6193084 bytes, checksum: 3bdd1b505e2e63b3865d89c32053e44b (MD5)<br>Approved for entry into archive by Ronildo Prado (ronisp@ufscar.br) on 2017-08-22T18:30:49Z (GMT) No. of bitstreams: 1 DissRWS.pdf: 6193084 bytes, checksum: 3bdd1b505e2e63b3865d89c32053e44b (MD5)<br>Approved for entry into archive by Ronildo Prado (ronisp@ufscar.br) on 2017-08-22T18:30:56Z (GMT) No. of bitstreams: 1 DissRWS.pdf: 6193084 bytes, checksum: 3bdd1b505e2e63b3865d89c32053e44b (MD5)<br>Made available in DSpace on

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Bragazzi, Lorenzo. "I materiali a memoria di forma: caratterizzazione e applicazione nel mondo dell'automazione." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/10937/.

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L'obiettivo di questo lavoro di tesi è stato studiare le caratteristiche, le proprietà, le applicazioni con conseguenti vantaggi e svantaggi di un particolare tipo di smart materials: i materiali a memoria di forma. Il capitolo 1 tratterà delle leghe metalliche a memoria di forma, il successivo si concentrerà invece sui polimeri a memoria di forma. In ognuno di questi, relativamente al materiale affrontato, si presterà particolare attenzione agli “effetti” che contraddistinguono tali materiali da quelli più comuni, come l’effetto memoria di forma o la superelasticità. Successivamente, nei vari

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31

Muir, Wood Alan Jamie. "Identation of shape memory materials." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613896.

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32

Gusarov, Boris. "PVDF polymères piézoélectriques : caractérisation et application pour la récupération d’énergie thermique." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAT091/document.

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Les travaux de cette thèse portent sur la caractérisation du polymères piézoélectriques de PVDF et celles de ses composites avec un alliage à mémoire de forme, pour des applications de récupération l'énergie thermique. Tout d'abord, une discussion est donnée sur les avancées actuelles des technologies de récupération d'énergie ainsi que leurs intérêts économiques. Des valeurs typiques de l'énergie pouvant être générée sont estimées, ainsi que des énergies nécessaires pour certaines applications.Une attention particulière est accordée aux principes de fonctionnement des matériaux pyroélectrique

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33

Underhill, Daniel Martin Lennard. "Ferromagnetic shape memory alloys." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.607746.

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34

Cao, Feina. "Shape Memory Polyurethane Nanocomposites." University of Akron / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1201922381.

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35

Famodu, Olugbenga Olawale. "Combinatorial investigation of ferromagnetic shape memory materials." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/2851.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2005.<br>Thesis research directed by: Material Science and Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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Noeth, Zachary R. "Actively modifying textures using shape memory materials." Connect to resource, 2008. http://hdl.handle.net/1811/32061.

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37

Santos, Jonadabe Martins dos. "Atomização e consolidação por fusão seletiva a laser da liga Cu-11,3Al-3,2Ni-3,0Mn-0,5Zr com efeito de memória de forma." Universidade Federal de São Carlos, 2015. https://repositorio.ufscar.br/handle/ufscar/8078.

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Submitted by Caroline Periotto (carol@ufscar.br) on 2016-10-10T12:55:43Z No. of bitstreams: 1 DissJMS.pdf: 4383574 bytes, checksum: 04172fa81fb0f3d2e00439bbeaf3cbd4 (MD5)<br>Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-10-20T19:49:46Z (GMT) No. of bitstreams: 1 DissJMS.pdf: 4383574 bytes, checksum: 04172fa81fb0f3d2e00439bbeaf3cbd4 (MD5)<br>Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-10-20T19:49:51Z (GMT) No. of bitstreams: 1 DissJMS.pdf: 4383574 bytes, checksum: 04172fa81fb0f3d2e00439bbeaf3cbd4 (MD5)<br>Made available in

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Toker, Guher P. "CHARACTERIZATION OF THE SHAPE MEMORY BEHAVIOR OF HIGH STRENGTH NiTiHfPd SHAPE MEMORY ALLOYS." UKnowledge, 2018. https://uknowledge.uky.edu/me_etds/114.

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NiTiHf alloys have emerged as potential materials for applications requiring high transformation temperatures (> 100 °C) with high strength and work output. Although they have high transformation temperatures, their low damping capacity, brittleness and poor superelastic responses (of Ti-rich NiTiHf) impedes their wider usage in many industrial applications. In this study, the quaternary alloying element of Pd has been added to NiTiHf alloys to improve and tailor their shape memory behavior,. NiTiHfPd alloys were systematically examined regarding the composition and heat treatments effects. Ef

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39

Lai, Alan Ph D. Massachusetts Institute of Technology. "Shape memory ceramics in small volumes." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104111.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2016.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 133-139).<br>Shape memory ceramics rely on martensitic transformations which are similar to those found in metallic shape memory materials, but ceramics offer several advantages over metals such as higher operating temperatures and lar

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Vili, Yvonne Y. F. Chan. "Designing smart textiles based on shape memory materials." Thesis, Heriot-Watt University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444799.

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Thamburaja, Prakash 1974. "Shape memory materials : crystallographic texture and its consequences." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/88855.

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42

Vialle, Greg. "Inductive activation of magnetite filled shape memory polymers." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28104.

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43

Guo, Weimin M. Eng Massachusetts Institute of Technology. "Orthopaedic applications of ferromagnetic shape memory alloys." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45957.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2008.<br>Includes bibliographical references (leaves 36-40).<br>Ferromagnetic shape memory alloys (FSMAs) are a new class of magnetic field-actuated active materials with no current commercial applications. By applying a magnetic field of around 0.4 T, they can exert a stress of approximately 1.5 MPa, exhibiting a strain of up to 6%. This thesis evaluates their technical and commercial feasibility in orthopaedic applications. Remote actuation is a key advantage FSMAs have over current implant m

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Retailleau, Matthieu. "De la photopolymérisation aux matériaux avancés : nouvelles combinaisons de chimies et de photoamorceurs." Thesis, Mulhouse, 2016. http://www.theses.fr/2016MULH9373.

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Cette thèse a eu comme objectif d'évaluer le potentiel de la photopolymérisation radicalaire (PR) pour de nouvelles applications mettant en oeuvre des épaisseurs plus importantes ou nécessitant le contrôle de la structure du réseau 3D, l'objectif final étant de se diriger vers des matériaux avancés. Le sujet de cette thèse s'est orienté autour de deux thématiques : les composites et les matériaux intelligents. La première partie de ce manuscrit a été consacrée au projet COMPOSFAST qui a eu pour but la réalisation automatisée de composites par PR. Notre objectif a été d'élaborer une formulation

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Cersoli, Trenton M. "Shape Memory Polymers Produced via Additive Manufacturing." Youngstown State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1619817489890187.

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Thamburaja, Prakash 1974. "Constitutive equations for superelasticity in crystalline shape-memory materials." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/8141.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2002.<br>Includes bibliographical references (leaves 118-122).<br>A crystal-mechanics-based constitutive model for polycrystalline shape-memory materials has been developed. The model has been implemented in a finite-element program. Finite-element calculations of polycrystal response were performed using two methods: (1) The full-finite element method where each element represents a single crystal chosen from a set of crystal orientations which approximate the initial crystallographic texture; (2) A simpl

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Gager, Mac (Brian McClure Jr ). "Cu-based shape memory microwires : towards complex structures." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/96453.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (page 33).<br>Shape memory alloys are a distinctive type of material that exhibits the fascinating properties of the shape memory effect and superelasticity. Shape memory properties are characterized by the diffusionless phase transformation between austenite and martensite that can be thermally or stress induced. Cu-based shape memory alloys provide an exciting area of research due to lower costs and higher

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48

Saghaian, Sayed M. "SHAPE MEMORY BEHAVIOR OF SINGLE CRYSTAL AND POLYCRYSTALLINE Ni-RICH NiTiHf HIGH TEMPERATURE SHAPE MEMORY ALLOYS." UKnowledge, 2015. http://uknowledge.uky.edu/me_etds/65.

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NiTiHf shape memory alloys have been receiving considerable attention for high temperature and high strength applications since they could have transformation temperatures above 100 °C, shape memory effect under high stress (above 500 MPa) and superelasticity at high temperatures. Moreover, their shape memory properties can be tailored by microstructural engineering. However, NiTiHf alloys have some drawbacks such as low ductility and high work hardening in stress induced martensite transformation region. In order to overcome these limitations, studies have been focused on microstructural engi

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Liang, Chen. "The constitutive modeling of shape memory alloys." Diss., This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-08232007-113153/.

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Kiefer, Bjoern. "A phenomenological constitutive model for magnetic shape memory alloys." Texas A&M University, 2006. http://hdl.handle.net/1969.1/4712.

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Abstract:

A thermodynamics-based constitutive model is derived which predicts the nonlinear strain and magnetization response that magnetic shape memory alloys (MSMAs) exhibit when subjected to mechanical and magnetic loads. The model development is conducted on the basis of an extended thermo-magneto-mechanical framework. A novel free energy function for MSMAs is proposed, from which the constitutive equations are derived in a thermodynamically-consistent manner. The nonlinear and hysteretic nature of the macroscopic material behavior is captured through the evolution of internal state variables which

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