Functional Characterization of Shape Memory CuZnAl Open-Cell Foams by Molten Metal Infiltration

Foams and other highly porous metallic materials with cellular structures are known to have many interesting combinations of physical and mechanical properties. That makes these systems very attractive for both structural and functional applications. Cellular metals can be produced by several methods including liquid infiltration of leachable space holders. In this contribution, results on metal foams of Cu based shape memory alloys (SMAs) processed by molten metal infiltration of SiO2 particles are presented. By using this route, highly homogeneous CuZnAl SMA foams with a spherical open-cell morphologies have been manufactured and tested. Morphological, thermo-mechanical and cycling results are reported.

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Acoustics Characterization of Nano Enhanced Open Cell Foams

10.4271/2015-01-2205 ◽

2015 ◽

Cited By ~ 1

Author(s):

John G. Cherng ◽

Simeng Xing ◽

Weiwei Wu ◽

Jan Ladewig ◽

Rolf Balte ◽

...

Keyword(s):

Open Cell ◽

Open Cell Foams

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Characterisation and Mechanical Testing of Open Cell Al Foams Manufactured by Molten Metal Infiltration of Porous Salt Bead Preforms: Effect of Bead Size

Metals ◽

10.3390/met2020122 ◽

2012 ◽

Vol 2 (2) ◽

pp. 122-135 ◽

Cited By ~ 13

Author(s):

Appichart Jinnapat ◽

Andrew Kennedy

Keyword(s):

Mechanical Testing ◽

Molten Metal ◽

Open Cell ◽

Bead Size ◽

Metal Infiltration ◽

Al Foams

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Functional Characterization of NiTi Shape Memory Elements for Smart Micro-Actuation

Volume 1: Development and Characterization of Multifunctional Materials; Modeling, Simulation and Control of Adaptive Systems; Integrated System Design and Implementation ◽

10.1115/smasis2013-3253 ◽

2013 ◽

Cited By ~ 1

Author(s):

Carlo Alberto Biffi ◽

Luca Bonacina ◽

Adelaide Nespoli ◽

Barbara Previtali ◽

Ausonio Tuissi

Keyword(s):

Shape Memory ◽

Mechanical Response ◽

Thermal Hysteresis ◽

Functional Characterization ◽

Functional Materials ◽

Mechanical Tests ◽

Calorimetric Analysis ◽

Production Route ◽

Definition Of

Shape Memory Alloys (SMAs) are smart and functional materials, which are considered good candidates for the activation of devices for the automotive, aerospace, biomedical and mechanical systems, thanks to the shape memory effect. In this work, a study on the mechanical response of NiTi SMA snake like elements has been proposed. The production route of these elements from thin sheets, was given by laser machining followed by chemical etching. The micro-elements were characterized by means of calorimetric analysis for the definition of the theoretical operating temperatures and by means of thermo-mechanical testing for the evaluation of their functional performances. Mechanical tests has been carried out to assess the tensile behavior of martensite and austenite separately, and to evaluate the thermal hysteresis under different constant loads. Moreover, Finite Element Modeling (FEM) has been also accomplished to study the numerical evaluation of the stress field that origins by the application of the different loads in both the martensitic and austenitic phases.

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