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000014094 0247_ $$2DOI$$a10.1016/j.msea.2010.11.055
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000014094 084__ $$2WoS$$aNanoscience & Nanotechnology
000014094 084__ $$2WoS$$aMaterials Science, Multidisciplinary
000014094 1001_ $$0P:(DE-Juel1)VDB61526$$aKöhl, M.$$b0$$uFZJ
000014094 245__ $$aCharacterization of porous, net-shaped NiTi alloy regarding its damping and energy-absorbing capacity
000014094 260__ $$aAmsterdam$$bElsevier$$c2011
000014094 300__ $$a2454 - 2462
000014094 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000014094 440_0 $$04203$$aMaterials Science and Engineering A$$v528$$x0921-5093
000014094 500__ $$aThis work was funded by the Deutsche Forschungsgemeinschaft (DFG) as part of SFB459 and is part of Manuel Kohl's PhD thesis. Furthermore, the authors wish to thank Dr. Russell Goodall (EPFL, Lausanne) for producing and providing the spherical salt particles.
000014094 520__ $$aPorous NiTi alloys are highly attractive for energy absorbers, damping devices and biomedical implants. In the present work, metal injection moulding (MIM) in combination with the application of a suitable space holder material was used for the production of NiTi parts with well defined pore sizes and porosities in the range of 30-70 vol.%. For comparing the properties, porous titanium and Ti-6Al-4V samples were prepared in the same manner.Focus of the present work was a detailed investigation of the mechanical properties of porous NiTi to estimate its potential regarding the abovementioned applications. For a Ni-rich NiTi alloy with a porosity of 50 vol.%, fully pronounced pseudoelasticity after 6% compression was demonstrated. An energy dissipation of 1.5 MJ/m(3) was measured, which could be directly related to the reversible austenite-martensite phase transformation. At higher deformations, pseudoelasticity becomes more and more superposed by the onset of plastic deformation. Nevertheless, even at deformations of up to 50%, a clearly pronounced amount of pseudoelastic shape recovery still remained. Fatigue of pseudoelasticity was investigated by conducting of up to 230,000 load cycles to 4% compression at a frequency of 1 Hz. (C) 2010 Elsevier B.V. All rights reserved.
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000014094 65320 $$2Author$$aPowder metallurgy
000014094 65320 $$2Author$$aShape memory alloys (SMA)
000014094 65320 $$2Author$$aPorous materials
000014094 65320 $$2Author$$aMechanical characterization
000014094 65320 $$2Author$$aFatigue
000014094 65320 $$2Author$$aDamping
000014094 650_7 $$2WoSType$$aJ
000014094 7001_ $$0P:(DE-Juel1)129591$$aBram, M.$$b1$$uFZJ
000014094 7001_ $$0P:(DE-HGF)0$$aMoser, A.$$b2
000014094 7001_ $$0P:(DE-Juel1)129594$$aBuchkremer, H.P.$$b3$$uFZJ
000014094 7001_ $$0P:(DE-HGF)0$$aBeck, T.$$b4
000014094 7001_ $$0P:(DE-Juel1)129666$$aStöver, D.$$b5$$uFZJ
000014094 773__ $$0PERI:(DE-600)2012154-4$$a10.1016/j.msea.2010.11.055$$gVol. 528, p. 2454 - 2462$$p2454 - 2462$$q528<2454 - 2462$$tMaterials science and engineering / A$$v528$$x0921-5093$$y2011
000014094 8567_ $$uhttp://dx.doi.org/10.1016/j.msea.2010.11.055
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