2018-Sustainable Industrial Processing Summit
SIPS2018 Volume 4. Mamalis Intl. Symp. / Advanced Manufacturing

Editors:F. Kongoli, A. G. Mamalis, K. Hokamoto
Publisher:Flogen Star OUTREACH
Publication Year:2018
Pages:352 pages
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
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    The Influence of Aging Treatments on a Ti-Ni 50.7 at. % Mechanical Spring

    Hugo de Souza Oliveira1; Henrique Alves Bandeira2; Aline Souza de Paula1;
    1UNIVERSITY OF BRASILIA, Brasilia, Brazil; 2UNIVERSITY OF BRASILIA, Brasília, Brazil;
    Type of Paper: Regular
    Id Paper: 363
    Topic: 48


    Near equiatomic Ti-Ni shape memory alloys have been attracting much interest for practical applications in many research fields, such as medical, orthodontic, mechanical, and aerospace industries [1], [2]. <br />The remarkable ability in recovering large strains as well as generating high stresses has caused an increase in manufacturing devices made up of these materials[1], [3]-[5].<br />Many studies assert that shape memory characteristics of binary Ti-Ni alloys can be improved through specific thermomechanical treatments, such as annealing following cold working [6]-[8], thermal and/or stress cycling [9], and aging after solution treatment [6], [8], [10]. For Ni rich Ti-Ni alloys, aging treatment is the most effective method for improving the shape memory and mechanical characteristics of the alloys [6], [8], [10].<br />In literature, many studies correlate the effects of aging treatments on the transformation behavior of the Ti-Ni alloys [5], [6], [11]-[15], however few focus on how it can influence the stress-strain hysteresis in mechanical elements [3], such as mechanical springs. This study presents how aging treatments ranging from low to high temperatures (573K to 773K) [16] for different times can affect the cyclic hysteretic behavior of a Ti-Ni 50.7 at. % shape memory spring. The findings enable the choice of appropriate heat treatments where specific energy dissipation rates are required.


    Ti-Ni springs; Ageing treatment; Hysteresis Loop; Shape memory alloy


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    Cite this article as:

    Oliveira H, Bandeira H, de Paula A. (2018). The Influence of Aging Treatments on a Ti-Ni 50.7 at. % Mechanical Spring. In F. Kongoli, A. G. Mamalis, K. Hokamoto (Eds.), Sustainable Industrial Processing Summit SIPS2018 Volume 4. Mamalis Intl. Symp. / Advanced Manufacturing (pp. 69-70). Montreal, Canada: FLOGEN Star Outreach