%0 Journal Article
%A Bram, M.
%A Köhl, M.
%A Buchkremer, H.P.
%A Stöver, D.
%T Mechanical Properties of Highly Porous NiTi Alloys
%J Journal of materials engineering and performance
%V 20
%@ 1059-9495
%C New York, NY
%I Springer
%M PreJuSER-15657
%P 522 - 528
%D 2011
%Z Record converted from VDB: 12.11.2012
%X Highly porous NiTi alloys with pseudoelastic properties are attractive candidates for biomedical implants, energy absorbers, or damping elements. Recently, a new method was developed for net-shape manufacturing of such alloys combining metal injection molding with the application of suitable space-holder materials. A comprehensive study of mechanical properties was conducted on samples with a porosity of 51% and a pore size in the range of 300-500 mu m. At low deformations < 6%, fully pronounced pseudoelasticity was found. Even at higher strains, a shape recovery of maximum 6% took place, on which the onset of irreversible plastic deformation was superposed. Results of static compression tests were also used to calculate the energy-absorbing capacity. Fatigue of porous NiTi was investigated by cyclic loading up to 230,000 stress reversals. The failure mechanisms responsible for a reduction of shape recovery after an increased number of load cycles are discussed.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000291225400008
%R 10.1007/s11665-011-9854-y
%U https://juser.fz-juelich.de/record/15657