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Journal Articles
AM&P Technical Articles (2021) 179 (3): 56–59.
Published: 01 April 2021
... zirconia-based shape memory ceramics httpsdoi.org/10.31399/asm.amp.2021-03.p056 56 FEATURE ADVANCED MATERIALS & PROCESSES | APRIL 2021 DIRECT ELECTRICAL ACTIVATION OF THE SHAPE MEMORY EFFECT New research explores a zirconia-based shape memory ceramic that exhibits a unique type of electrically triggered...
Journal Articles
AM&P Technical Articles (2024) 182 (3): 49–52.
Published: 01 April 2024
...Jun Cui; Stefan Seelecke; Paul Motzki; Qingping Sun; Ichiro Takeuchi Both shape memory and elastocaloric effects are related to the reversible martensitic phase transformation. For the shape memory effect, thermal energy is used to drive the material through the phase transformation and recover its...
Journal Articles
AM&P Technical Articles (2024) 182 (7): 42–46.
Published: 01 October 2024
... extensively studied hightemperature shape memory alloys (HTSMAs). exhaustive, this overview captures the major concepts influencing fatigue and failure mechanisms. Colored arrows denote well-studied factors with established effects on actuation fatigue and white arrows indicate topics that have been less...
Journal Articles
AM&P Technical Articles (2013) 171 (2): 13–14.
Published: 01 February 2013
... a promising charac- teristic to achieve the shape memory effect on the Fig. 4 In situ heating of single 70-nm nanowires from RT (a) to 100°C (b), followed by cooling to RT (c). Reversible transformations are observed. A structural model of the nanowire is shown in (d), viewing along the [121] zone axis...
Journal Articles
AM&P Technical Articles (2018) 176 (2): 16–18.
Published: 01 February 2018
...-organizational collaboration and knowledge sharing. In recent years, CASMART activities have included publishing papers on SMA actuation design and modeling methods, identifying best practices for shape memory effect characterization, and exploring high-temperature SMAs, particularly the NiTiHf material system...
Journal Articles
AM&P Technical Articles (2019) 177 (7): 43–47.
Published: 01 October 2019
... with bent wires made of equiatomic NiTi (known by its weight percent name NitinoI 55), the Buehler team observed that heating slightly above room temperature sometimes resulted in the wires returning to their original shape prior to bending. Buehler recognized this as a shape memory effect...
Journal Articles
AM&P Technical Articles (2022) 180 (7): 35–37.
Published: 01 October 2022
... Featuring unique superelastic behavior, shape mem- memory effect[5]. In 2015, the team discovered a relatively ory alloys, specifically NiTi alloys, are widely used as self- inexpensive Co-Cr-Al-Si system with a chemical composition expanding vascular stents and orthopedic bone staples. Due to concerns...
Journal Articles
AM&P Technical Articles (2013) 171 (4): 21–24.
Published: 01 April 2013
... of the observed area. Characterizing SMAs SMAs are metallic alloys that have unique properties, namely the shape memory effect and superelasticity, which make them wellsuited for use in a variety of advanced applications[8]. Both of these properties arise from a solid-to-solid, diffusionless phase transformation...
Journal Articles
AM&P Technical Articles (2020) 178 (3): 60–62.
Published: 01 April 2020
... shear loading: (a) temperature sensitivity as a function of stress, and (b) output shear strain as a function of stress. The solid symbols in (b) represent the two-way shape-memory effect after training. The transformation temperatures are indicated in the legend: martensite start (Ms), martensite...
Journal Articles
AM&P Technical Articles (2025) 183 (2): 36–40.
Published: 01 March 2025
... application. Use cases in the medical industry FEATURE 39 ADVANCED MATERIALS & PROCESSES | MARCH 2025 predominantly utilize NiTi material for its superelasticity, defined as the material s elastic response to an applied stress. This is in stark contrast to the thermally induced shape memory effect utilized...
Journal Articles
AM&P Technical Articles (2021) 179 (7): 46–49.
Published: 01 October 2021
... as an initiation site for the fatigue crack in the wire-form component from Fig. 1. FEATURE In simple terms, the shape memory effect is exhibited when a phase transformation to martensite is thermally induced, deformed while in the martensitic state, and is then heated to revert it to its parent phase and shape...
Journal Articles
AM&P Technical Articles (2024) 182 (7): 38–41.
Published: 01 October 2024
...: 27419615, PMCID: PMC5508979. 3. S.M. Hasan, et al., Effects of Isophorone Diisocyanate on the Thermal and Mechanical Properties of Shape-Memory Polyurethane Foams, Macromol Chem Phys, 215(24), p 24202429, Dec 2014, doi.org/10.1002/macp.201400407, Epub Oct 30, 2014, PMID: 30220825, PMCID: PMC6136255. 4. S.M...
Journal Articles
AM&P Technical Articles (2019) 177 (5): 16–21.
Published: 01 July 2019
... printing computational modeling functional materials laser powder bed fusion shape memory alloys A D V A N C E D M A T E R I A L S & P R O C E S S E S | J U L YA/DADUI TGIUVSETM2E0T1A9L S 1166 httpsdoi.org/10.31399/asm.amp.2019-05.p016 M4DEPRTINATLINLGIOCF FUNCTIONAL MATERIALS Kadri C. Atli, Luke...
Journal Articles
AM&P Technical Articles (2023) 181 (7): 37–39.
Published: 01 October 2023
...; as well as blinds and shades in architectural applications. Taking a step further, research over the past decade has shown that shape memory materials can be effectively utilized with additive manufacturing processes to produce high-value products. 4D PRINTING Advances in additive manufacturing have...
Journal Articles
AM&P Technical Articles (2021) 179 (7): 41–45.
Published: 01 October 2021
... processing would be to locally decrease the stiffness. In shape memory actuation applications, the effect is a multi-stage actuation. The process has been described as Multiple Memory Material. The purpose of this article is to highlight recent applications of selective vaporization to enable functional...
Journal Articles
AM&P Technical Articles (2019) 177 (3): 58–66.
Published: 01 April 2019
... Ph.D. in materials science from Carnegie-Mellon University. My interests in this field began in 1980 after accidentally discovering a shape memory effect in beta titanium alloys while working at Brown Boveri in Switzerland. While not terribly practical as a shape memory alloy, this spurred me...
Journal Articles
AM&P Technical Articles (2022) 180 (3): 49–53.
Published: 01 April 2022
.... I. Karaman, et al., The Effect of Severe Marforming on Shape Memory Characteristics of a Ti-rich NiTi Alloy Processed using Equal Channel Angular Extrusion, Metall. Mater. Trans. A., 34: 2527-2539, 2003. 13. H. Nakayama, et al., Crystal Refinement and Amorphisation by Cold Rolling in TiNi Shape...
Journal Articles
AM&P Technical Articles (2020) 178 (4): 15–20.
Published: 01 May 2020
... of polymers is often accomplished by built-in shape-memory effect (SME), which relies on the ability of a polymer to close a wound using the energy stored during mechanical damage. Another approach disperses microspheres into a polymer matrix, which upon mechanical damage spills a healing agent to fill...
Journal Articles
AM&P Technical Articles (2024) 182 (3): 61–66.
Published: 01 April 2024
..., and shape memory alloys. He rose to prominence in 1998 after publishing one of the first studies on the ferromagnetic shape memory effect, Magnetostriction of Martensite, which has been cited over 900 times. Wuttig was named to Stanford University s List of the World s Top 2% Scientists in 2021. ...
Journal Articles
AM&P Technical Articles (2021) 179 (3): 52–55.
Published: 01 April 2021
....2020.104221, Epub Nov. 23, 2020. 16. S. Sivan, M. Di Prima, and J.D. Weaver, Effect of Applied Potential on Fatigue Life of Electropolished Nitinol Wires, Shape Memory and Superelasticity, Vol 3, No. 3, p 238-249, 2017. 17. G.M. Sena, et al., Larger Surface Area Can Reduce Nitinol Corrosion Resistance. npj...