caa a22 4500 463191986 CHVBK 20180406164911.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10973-006-7625-z doi (NATIONALLICENCE)springer-10.1007/s10973-006-7625-z Metastable effects on martensitic transformation in SMA [Elektronische Daten] Part III. Tentative temperature effects in a NiTi alloy [C. Auguet, A. Isalgue, F. Lovey, J. Pelegrina, S. Ruiz, V. Torra] The applicability of shape memory alloys (SMA) for dampers in civil engineering requires guaranteed behavior with well controlled or irrelevant changes after several years of inactivity and/or under the action of daily or seasonal temperature effects. The long time analysis of the aging temperature effects on a NiTi alloy shows similar behavior to other SMA but with higher time constants at temperatures near 373 K: 1.9 days at 410 K and near 100 days at 363 K with an activation energy value near 12500 K (RT=104 kJ mol−1). At the present state of the art, the measurements show that the change of transformation temperatures under the action of the external temperature (or ‘room temperature' change) is close to 15 K. The direct use of the as furnished material can suffer relevant changes of working properties in devices under the action of direct sunlight or high room temperature working conditions. Springer Science+Business Media LLC, 2007 diffusion nationallicence martensitic transformation nationallicence NiTi nationallicence nitinol nationallicence SMA nationallicence temperature effects nationallicence time effects nationallicence Auguet C. CIRG, DFA, ETSECCPB, UPC, Campus Nord B4, 08034, Barcelona, Catalonia, Spain aut Isalgue A. CIRG, DFA, ETSECCPB, UPC, Campus Nord B4, 08034, Barcelona, Catalonia, Spain aut Lovey F. Centro Atómico Bariloche, 8400, S.C. de Bariloche, Argentina aut Pelegrina J. CONICET and Centro Atómico Bariloche, 8400, S.C. de Bariloche, Argentina aut Ruiz S. TA Instruments Division, Cerdanyola (Barcelona), Spain aut Torra V. CIRG, DFA, ETSECCPB, UPC, Campus Nord B4, 08034, Barcelona, Catalonia, Spain aut Journal of Thermal Analysis and Calorimetry Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 89/2(2007-08-01), 537-542 1388-6150 89:2<537 2007 89 10973 https://doi.org/10.1007/s10973-006-7625-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-006-7625-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Auguet C. CIRG, DFA, ETSECCPB, UPC, Campus Nord B4, 08034, Barcelona, Catalonia, Spain aut NATIONALLICENCE 700 1- Isalgue A. CIRG, DFA, ETSECCPB, UPC, Campus Nord B4, 08034, Barcelona, Catalonia, Spain aut NATIONALLICENCE 700 1- Lovey F. Centro Atómico Bariloche, 8400, S.C. de Bariloche, Argentina aut NATIONALLICENCE 700 1- Pelegrina J. CONICET and Centro Atómico Bariloche, 8400, S.C. de Bariloche, Argentina aut NATIONALLICENCE 700 1- Ruiz S. TA Instruments Division, Cerdanyola (Barcelona), Spain aut NATIONALLICENCE 700 1- Torra V. CIRG, DFA, ETSECCPB, UPC, Campus Nord B4, 08034, Barcelona, Catalonia, Spain aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 89/2(2007-08-01), 537-542 1388-6150 89:2<537 2007 89 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 458095559 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer