Journal
RUSSIAN JOURNAL OF NON-FERROUS METALS
Volume 53, Issue 2, Pages 169-175Publisher
ALLERTON PRESS INC
DOI: 10.3103/S1067821212020113
Keywords
shape memory alloy; niti; powder metallurgy; mechanical alloying; shear punch testing
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In this study, Porous NiTi shape memory alloy has been produced by mechanical alloying of the elemental Ni and Ti powders. The compacting process was done at two temperatures (warm and cold press) and then sintering at 980 and 1050A degrees C was performed on the specimens. Microstructure and mechanical prop-erties of the samples were investigated by optical microscopy, scanning electron microscopy (SEM) and X-ray diffraction. Moreover, shear punch test (SPT) employed to investigate the effect of compaction pressure and sintering temperature on the mechanical properties of the fabricated samples. It was revealed that warm compaction/sintering resulted in 15% yield stress improvement and 20% ultimate tensile strength (UTS) enhancement with respect to conventionally produced specimens. The proposed approach in this paper seems a step forward towards fulfillment of the demand for heavy load-bearing artificial bone.
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