Determination of Local Thermophysical Properties and Heat of Transition from Thermal Fields Measurement During Drop Calorimetric Experiment

Vincent Delobelle (1) , Denis Favier (1) , Hervé Louche (2, 3) , Nathanael Connesson (1)

1 TIMC-IMAG-BioMMat - Ingénierie Biomédicale et Mécanique des Matériaux
2 LMGC - Laboratoire de Mécanique et Génie Civil
3 ThM2 - ThermoMécanique des Matériaux

This paper proposes a non-contact original method to estimate local ther-mophysical properties (heat capacity and thermal conductivity) and heats of transition from plane thin specimens. This method is based on measurement of temperature fields with an infrared camera during a drop calorimet-ric experiment. A studied specimen and a reference specimen, with similar geometries, are simultaneously tested. Firstly, the method is validated by estimating heat capacity and thermal conductivity of Vanadium specimens and by comparing the determined values with those obtained by Differential Scanning Calorimetry and by a laser flash method, respectively. Secondly, the method is used to determine latent heats of martensitic transformations. These heats of transition are determined during homogeneous and heterogeneous drop calorimetric experiments of NiTi shape memory alloys specimens. Measured transformation temperatures and latent heats are in good accor-* dance with results obtained by Differential Scanning Calorimetry.

Mots clés: Infrared thermography; heat capacity; thermal conductivity; heat sources estimation; experimental benchmark; NiTi Shape Memory Alloy

Domaines: Matériaux; Mécanique des matériaux [physics.class-ph]; Matériaux et structures en mécanique [physics.class-ph]; Thermique [physics.class-ph]

Vincent Delobelle, Denis Favier, Hervé Louche, Nathanael Connesson. Determination of Local Thermophysical Properties and Heat of Transition from Thermal Fields Measurement During Drop Calorimetric Experiment. Experimental Mechanics, 2015, 55 (4), pp.711-723. ⟨10.1007/s11340-014-9877-z⟩. ⟨hal-01300519⟩