Heat Transfer Effects on Defect Boundaries Captured by Digital Holographic Interferometry and Infrared Thermography Workstation: an Overview on Experimental Results

• Published in: Experimental techniques (Westport, Conn.) Conn.), 2020-02, Vol.44 (1), p.59-74
• Main Authors: Tornari, V., Andrianakis, M., Chaban, A., Kosma, K.
• Format: Article
• Language: English
• Subjects: Boundaries; Characterization and Evaluation of Materials; Chemistry and Materials Science; Defects; Equilibrium; Heat exchange; Heat transfer; Holographic interferometry; Infrared imaging; Materials Science; Real time; Sound; Thermography; Work stations; Workstations
• ISSN: 0732-8818; 1747-1567
• DOI: 10.1007/s40799-019-00336-w

The heat transfer effect is observed from existing defects through heat diffusion to the sound area of the sample in long term after the sample has reached values close to the initial, signifying equilibrium with the environment. Two complementary systems providing the kinetic and thermal information of the samples were used to construct a real-time monitoring workstation in order to monitor the real-time responses of the sample after thermal excitation. Results indicate that the defect boundaries and the sound non-defect area continue to exchange thermal values long after the total area of the sample reaches initial temperature in equilibrium with environment. Hence, it is here suggested that the continuous aging of artworks in controlled environments may be a result of the ongoing low thermal heat transfer from the defect to the sound areas provoking a slow but steady surface displacement and consequently deterioration mechanism against the preventive conservation measures based on environmental equilibrium.