The pseudoelasticity and the shape memory effect in CoNiAl alloys
Journal Title: Materials Engineering - Materialove inzinierstvo (MEMI) - Year 2014, Vol 21, Issue 1
Abstract
The cobalt alloys (close to the CoNiAl stoichiometry) are the less known shape memory alloys. Such behavior is consequence of the martensitic transformation. The pseudoelasticity is caused by the stress-induced martensitic transformation above the equilibrium martensite start temperature from high temperature cubic phase (austenite) to lower symmetry phase (martensite). In CoNiAl the pseudoelastic behavior can be obtained by the high temperature annealing. In presented work the effect of the annealing temperature on both pseudoelastic behavior and microstructure was investigated.
Authors and Affiliations
Jaromír Kopeček, Markéta Jarošová, Karel Jurek, Oleg Heczko
Keywords
Related Articles
- EP ID EP99317
- DOI -
- Views 121
- Downloads 0
PROTECTIVE LAYERS OF IRON AND NICKEL ALUMINIDES ON STEEL
Intermediary phases Ni-Al and Fe-Al are promising materials due to their superior properties such as hardness and good resistance against oxidation at high temperatures. Moreover, Fe-Al phases are resistant in sulphur -...
The effect of different shot peening intensities on fatigue life of AW 7075 aluminium alloy
In this study the effect of different shot peening intensities, from very light peening with ceramic beads to severe shot peening with high coverage, on the fatigue life of aircraft AW 7075 aluminium alloy was investigat...
High temperature degradation of powder-processed Ni-based superalloy
The aim of present work is to study the high temperature degradation of the powder-processed polycrystalline superalloy Ni-15Cr-18Co-4Al-3.5Ti-5Mo. This superalloy has been applied as material for grips of a creep machin...
CHARACTERIZATION OF PHASES IN SECONDARY AlZn10Si8Mg CAST ALLOY
Using recycled aluminium cast alloys is profitable in many aspects. Requiring only 5 % of the energy to produce secondary metal as compared to primary metal and generates only 5 % of the green house gas emissions, the re...
Static and dynamic tensile characteristics of DP600 steel sheets
Dynamic tensile testing of sheet steels is becoming more important. Experimental dynamic tensile technique is depending on the strain rate. Each serves for a specific range of strain rates and provides specific type of i...