Production of Ti-22Nb-6Zr Shape Memory Alloy by Powder Metallurgy Escola de Engenharia de Lorena EEL - USP

Format:

Conference/Event

Author/Creator:

dos Reis Luz, dos Reis Luz, author.

Contributor:

de Camargo, Eliene Nogueira

de Oliveira, Jose Luis

Diniz, Edevaldo Faria

Henriques, Vinicius Andre Rodrigues

Conference Name:

21st SAE Brasil International Congress and Exhibition (2012-10-02 : Sao Paulo, Brazil)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2012

Summary:

Shape Memory Alloys (SMA) are novel materials which have the ability to return to a predetermined shape when heated. SMA are useful as actuators which are materials that change shape, stiffness, position, natural frequency, and other mechanical characteristics in response to temperature or electromagnetic fields. Applications include engines in cars and airplanes, electrical generators and surgical implants that make use of the mechanical energy resulting from the shape transformations. Powder metallurgy allows the SMA production with savings of energy and time and with higher microstructural homogeneity than those obtained by conventional processes. In this work a new nickel-free titanium alloy Ti-22Nb-6Zr (%at) was produced in order to expand the application field of SMA. Samples were produced by mixing of initial metallic powders followed by uniaxial and cold isostatic pressing with subsequent densification by sintering between 800-1600°C, in vacuum. Sintered samples were characterized for phase composition, microstructure and microhardness by X-ray diffraction, scanning electron microscopy and Vickers indentation, respectively. Density was measured by Archimedes method. It was shown that the samples were sintered to high densities and presented homogeneous microstructure with complete dissolution of alloying elements in the titanium matrix

Notes:

Vendor supplied data

Publisher Number:

2012-36-0467

Access Restriction:

Restricted for use by site license