TY  - JOUR
AU  - Bram, M.
AU  - Köhl, M.
AU  - Buchkremer, H.P.
AU  - Stöver, D.
TI  - Mechanical Properties of Highly Porous NiTi Alloys
JO  - Journal of materials engineering and performance
VL  - 20
SN  - 1059-9495
CY  - New York, NY
PB  - Springer
M1  - PreJuSER-15657
SP  - 522 - 528
PY  - 2011
N1  - Record converted from VDB: 12.11.2012
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000291225400008
DO  - DOI:10.1007/s11665-011-9854-y
UR  - https://juser.fz-juelich.de/record/15657
ER  -