Complex thermal and thermomechanical treatments

Benefit description

The high-resolution dilatometers from CENIM-CSIC Phase Transformation laboratory, allow the performance of almost any possible thermal treatment and Thermomechanical (with some limitations). This service and its variants can only use 1 at a time out of the 3 different modules existing for the dilatometers. Once a module is selected for the thermal/thermomechanical treatment, it will be used in the whole experiment. For example, if cryogenic temperatures are involved in the thermal treatment only Alpha module can be used. Dilatometry module (no-deformation, no cryogenic) Deformation module (only compression, no cryogenic) Alpha module (for cryogenic temperatures, no deformation, some limitations in the operation conditions) Variant ciclo térmico básico (basic thermal treatment, <= 1h) Will be applied to thermal treatments with a total duration <= 1h Variant ciclo térmico básico con deformación (basic thermal treatments with deformation) Will be applied to thermal treatments with deformation and a total duration <= 1h Variant tiempo extra (extra time) (0-60 min) As many as necessary "tiempo extra" variants will be added to the corresponding basic thermal treatment to account for the extra time as compared to the basic thermal treatment (<= 1h). Example : In the case of a thermal/thermomechanical heat treatment with : Total duration = 90 min Extra time = 30 min Nº of "tiempo extra" variants to add to the basic thermal treatment= 1 Total duration = 165 min Extra time = 105 min Nº of "tiempo extra" variants to add to the basic thermal treatment= 2 Variant ciclo térmico con temperaturas criogénicas (thermal treatment with cryogenic temperatures) NO deformation can be applied when working within this variant. Due to the particular characteristics of the module use in the dilatometer the following limitations apply. Heating and cooling rates limited to 0.1-50ºC/s and a Tmax of 1000ºC. This variant applies to thermal treatments where cryogenic temperatures are involved and with a total duration <= 1h. If total time is longer than a 1h, as many as necessary "tiempo extra" variants will be added to account for the extra time, as already explained. Except for where it was indicated otherwise, the general conditions for this service (Complex thermal and thermomechanical cycles) are : Temperature: Induction heating. Thermocouples type K or S Tmin= room Tmax = 1150ºC (180-300s) Precission 0.05ºC Atmosphere Vacumm of 5*10-5 mbar Protected atmosphere of He Heating and cooling rates Minimum heating and cooling rate 0.1ºC/s Maximum rates will depend on thermal conductivity of the material, hollow or solid samples, dimensions and temperature range. If deformation is programed, cooling and heating rates are more limited. Example for a solid sample (Ø = 4 mm y l = 10 mm),of steel using the pure dilatometry module. . Max. Cooling rate 250ºC/s Max. Heating rate 2000ºC/s Deformation and deformation rate Load cell has a limit of 20 kN Deformation will be only applied between 250-1150ºC e = 0.05-1.2 . up to 3 mm of residual simple length. e(dot) = 0.5-12.5 s-1 Sample dimensions For dilatometry Solid Ø = 4/3 mm y h = 10/12 mm Hollow de: Øext. = 4 mm Øint. = 3.6 mm y h = 10 mm Check with us for other possibel geometries. With the deformation module Solid Ø = 5 mm y h = 10 mm