Resumen

CASTILLO MATOS, Juan Ramón; FERNANDEZ COLUMBIE, Tomás; ALCANTARA BORGES, Dayanis  y  RODRIGUEZ GONZALEZ, Isnel. Microstructural behavior of unions of dissimilar material obtained by explosion welding. Min. Geol. [online]. 2017, vol.33, n.2, pp. 204-218. ISSN 1993-8012.

The objective of this investigation is to establish the behaviour of the micro-structure of dissimilar joints made of titanium with AISI 1020, 1066 and 1008 steels through explosion welding. A detonation velocity of 2 800 m/s, a charge radius of 0,345 kg and a collision velocity of 1196, 16 m/s with an explosive volume of 600 cm³ and a density of 1,15 g/ cm³ were considered. The microstructures obtained were composed of equiaxed ferrite grains, very fine grains of troostitic type and coarse grains with ferrite grid. Fine and aligned grains of ferrite type are observed in the casted area of both base materials. The metal hardness experienced an increase in samples from 120 HV AISI 1008 steel up to 250 HV for AISI 1066 steel. The AISI 1020 steel joint with titanium has an line shaped interface unlike the AISI 1008 steels with 4063 forms waves with uniform width, which provides a higher mechanical resistance associated with the ductility of the AISI 1008 steel.

Palabras clave : explosion welding; dissimilar unions; microstructural behavior; AISI 1020 steel; AISI 1066 steel.

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