Shape Memory NiTi Alloys Obtained by Powder Metallurgy Route

Mariana Lucaci; M. Valeanu; Radu L. Orban; Violeta Tsakiris; Diana C. Cirstea; Lucia Leonat

doi:10.4028/www.scientific.net/MSF.672.99

Paper Titles

The Improving of the Process of the Iron, the Cast Iron and the Copper Powder Mixing
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Modeling of Droplet Dynamic and Thermal Behavior during Gas Atomization Process
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Physical Properties of Bonded Nanocomposite Type Hard-Soft Magnets
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Wear Resistant In Situ MMC Sintered with FeBC Liquid Phase
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Shape Memory NiTi Alloys Obtained by Powder Metallurgy Route
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Inductive Sensor with Sintered Magnetic Core to Evaluate the Performances of the Table Tennis Players
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CdS Powders Obtained by Chemical Bath Deposition
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Research Regarding the Influence of the Compaction Pressure of the Iron Powder on the Processes that Take Place when Elaborating Steels Obtained through the Carburizing – Sintering Proceeding
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An Electrochemical Machining Device for Residual Stresses Measurement in PM Parts by Layer Removal Method
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HomeMaterials Science ForumMaterials Science Forum Vol. 672Shape Memory NiTi Alloys Obtained by Powder...

Shape Memory NiTi Alloys Obtained by Powder Metallurgy Route

Abstract:

The effect of Fe, respective Cu, additions as substitute for Ni in NiTi shape memory alloys (SMAs) on the delaying of its phase transition and narrowing hysteresis are well known, NiTi-Fe and NiTi-Cu SMAs having applications especially to the actuators that require such properties. These SMAs are currently produced by conventional melting methods, which are energo-intensive and impose very severe processing conditions to avoid contamination. The results of researches presented in this paper prove the possibility of these SMAs obtaining by powder metallurgy via reactive sintering – more advantageous from both technical and economic point of view. A beneficial effect on both sintering and homogeneity of the obtained SMAs proved to have a controlled mechanical alloying applied to powder mixture before compacting and sintering.

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Periodical:

Materials Science Forum (Volume 672)

Pages:

99-104

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.672.99

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Online since:

January 2011

Authors:

Mariana Lucaci, M. Valeanu, Radu L. Orban, Violeta Tsakiris, Diana C. Cirstea, Lucia Leonat

Keywords:

Martensitic Transformation (MT), NiTi Shape Memory Alloy (SMA), Reactive Sintering

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