Effect of milling duration on the evolution of shape memory properties in a powder processed Cu–Al–Ni–Ti alloy
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Mohit Sharma
Abstract
The present work describes the effect of milling duration on the properties of a powder metallurgy processed Cu–Al–Ni–Ti shape memory alloy employing mechanical alloying. Powder mixtures milled for different durations were sintered in order to investigate the formation of solid solution and evolution of martensitic structure. The idea was to optimize the duration of milling (mechanical alloying) to obtain chemical homogeneity as well as shape memory properties in the processed material without undergoing extensive post homogenization treatment. The martensitic structure was noted to evolve in the powder mix milled for at least 16 hrs, whereas complete transformation to martensite occurred after milling for 40 hrs. Interestingly, the dissolution of alloying elements (to form the β phase prior to the formation of martensite) was noted to complete partially only during mechanical alloying for 40 hrs and remaining during subsequent sintering for 1 hr. The hot pressed compacts of the powders milled for 40 hrs were chemically homogeneous and consisted of fully martensite phase, which is essential for the realization of shape memory properties. They also revealed almost 100% shape recovery at the applied pre-strain levels of 1 and 2%.
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© 2013, Carl Hanser Verlag, München
Artikel in diesem Heft
- Contents
- Contents
- Original Contributions
- The interrelated effect of activation energy and grain boundary energy on grain growth in nanocrystalline materials
- Microstructural evolution of as-rolled modified 9Cr-1Mo steel during friction stir welding
- Effect of milling duration on the evolution of shape memory properties in a powder processed Cu–Al–Ni–Ti alloy
- Experimental investigation of phase equilibria in the Co–Cr–W ternary system
- Phase equilibria of the Zn–Al–Ti system at 370°C in the Zn-rich region
- Enthalpies of mixing in liquid alloys of iron with the lanthanides
- Ab-initio studies of some rare-earth borides: CeB2, PrB2, NdB2, and PmB2
- Influence of different contents of Si and Cu on the solidification pathways of cast hypoeutectic Al-(5–9)Si-(1–4)Cu (wt.%) alloys
- Undercooling of Sn–Ag–Cu alloys: solder balls and solder joints solidification
- Nitrogen deficiency and metal dopant induced sub-stoichiometry in titanium nitride thin films: a comparative study
- The influence of AlCrN coating on the high-temperature corrosion resistance of Ti-46Al-7Nb alloy in an atmosphere containing 9%O2 + 0.2%HCl + 0.08%SO2 + N2
- PEMFC membrane electrode assembly degradation study based on its mechanical properties
- Effect of epoxy resin properties on the mechanical properties of carbon fiber/epoxy resin composites
- Microstructural aspects of ceramic hollow microspheres reinforced metal matrix composites
- Copper/bamboo fabric composite prepared via a silver catalytic electroless deposition process for electromagnetic shielding
- People
- Dr. Herbert Karl Schmid
- Ludwig Gauckler
- DGM News
- DGM News
Artikel in diesem Heft
- Contents
- Contents
- Original Contributions
- The interrelated effect of activation energy and grain boundary energy on grain growth in nanocrystalline materials
- Microstructural evolution of as-rolled modified 9Cr-1Mo steel during friction stir welding
- Effect of milling duration on the evolution of shape memory properties in a powder processed Cu–Al–Ni–Ti alloy
- Experimental investigation of phase equilibria in the Co–Cr–W ternary system
- Phase equilibria of the Zn–Al–Ti system at 370°C in the Zn-rich region
- Enthalpies of mixing in liquid alloys of iron with the lanthanides
- Ab-initio studies of some rare-earth borides: CeB2, PrB2, NdB2, and PmB2
- Influence of different contents of Si and Cu on the solidification pathways of cast hypoeutectic Al-(5–9)Si-(1–4)Cu (wt.%) alloys
- Undercooling of Sn–Ag–Cu alloys: solder balls and solder joints solidification
- Nitrogen deficiency and metal dopant induced sub-stoichiometry in titanium nitride thin films: a comparative study
- The influence of AlCrN coating on the high-temperature corrosion resistance of Ti-46Al-7Nb alloy in an atmosphere containing 9%O2 + 0.2%HCl + 0.08%SO2 + N2
- PEMFC membrane electrode assembly degradation study based on its mechanical properties
- Effect of epoxy resin properties on the mechanical properties of carbon fiber/epoxy resin composites
- Microstructural aspects of ceramic hollow microspheres reinforced metal matrix composites
- Copper/bamboo fabric composite prepared via a silver catalytic electroless deposition process for electromagnetic shielding
- People
- Dr. Herbert Karl Schmid
- Ludwig Gauckler
- DGM News
- DGM News