Influence of Zirconium Percentage on Microhardness and Corrosion Resistance of Ti50 Ni50-xZrx Shape Memory Alloys
AUTOR(ES)
Ramos, Alana Pereira
FONTE
Mat. Res.
DATA DE PUBLICAÇÃO
19/08/2019
RESUMO
To obtain high temperature shape memory alloys of the lower cost Ni-Ti-X system, elements such as Hf and Zr are introduced to modify the thermal and mechanical properties of these alloys. This work studied the production and characterization of Ti50 Ni50-x Zrx alloys (x = 0, 5, 10 at.%) with the aim of improving their thermal, mechanical and corrosion resistance properties. In the resulting alloys, transformation of phase B2 into phase B19' occurred in a single stage. The addition of zirconium led to an increase of transformation temperatures, as well as the appearance of second phase particles in the grain boundaries of the matrix. The increase in zirconium percentage favored the increase of corrosion resistance from 520.23KΩ to 1007.30KΩ and of microhardness from 346HV to 543HV for the N0 and N10 alloys, respectively.
Documentos Relacionados
- Effects of composition on transformation temperatures and microstructure of Ni-Ti-Hf shape memory alloys
- Surface Characterization of NiTi Superelastic and Shape Memory Alloys After Electrolytic Polishing
- Heat treatments and thermomechanical cycling influences on the R-phase in Ti-Ni shape memory alloys
- Study of the martensitic transition in Ni-Mn-Sn-Ti ferromagnetic shape memory alloys
- ECAE processed NiTi shape memory alloy