Study of aluminum content in a welding metal by thermoelectric measurements

H. Carreón; S. Ramirez; C. Coronado; M. Salazar

doi:10.1117/12.2295723

27 March 2018 Study of aluminum content in a welding metal by thermoelectric measurements

H. Carreón, S. Ramirez, C. Coronado, M. Salazar

Proceedings Volume 10599, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XII; 1059922 (2018) https://doi.org/10.1117/12.2295723
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2018, Denver, Colorado, United States

Abstract

This work investigates the effect caused by the aluminum content in a welding metal and its variation in mechanical properties through the use of a non-destructive thermoelectric technique. It is known that aluminum has positive effects as deoxidizer in low percentages and alloying element together with Niobium and Vanadium. Aluminum has a positive and negative effect, initially improves the mechanical properties of the metal, as it acts as a grain refiner, increasing the yield strength, but in larger quantities, important mechanical properties such as hardness and toughness are seriously affected. For this purpose, HSLA ASTM 572 Gr. 50 steel was used as the base metal, where the weld metal was deposited, after which the specimens were fabricated and the mechanical tests and non-destructive tests were carried out. The sensitivity of the thermoelectric potential technique to microstructural and chemical composition changes was confirmed. The evolution of absolute thermoelectric potential (TEP) values with respect to the percentage of aluminum added to the weld was observed, being also quite sensitive to defects such as micro-cracks.

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H. Carreón, S. Ramirez, C. Coronado, and M. Salazar "Study of aluminum content in a welding metal by thermoelectric measurements ", Proc. SPIE 10599, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XII, 1059922 (27 March 2018); https://doi.org/10.1117/12.2295723

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KEYWORDS

Aluminum

Thermoelectric materials

Metals

Electrons

Nondestructive evaluation

Solids

Chemical species

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