Microstructure in the Interface Zone of Bimetal 09Mn2Si Steel/Ti Joint Obtained by Explosion Welding

Autor: Olga V. Antonova, I. G. Shirinkina, Yu. P. Besshaposhnikov
Rok vydání: 2021
Předmět:
Zdroj: Physics of Metals and Metallography. 122:1391-1400
ISSN: 1555-6190
0031-918X
DOI: 10.1134/s0031918x20140045
Popis: Optical (OM), scanning electron (SEM), and transmission electron microscopy (TEM) were used to investigate microstructure in the interface zone of 09Mn2Si steel/Ti joint obtained by means of explosion welding. It was shown that the bonding interface had a wavy appearance. Moreover, it was observed that grains near the interface were elongated in parallel to the explosion direction. TEM study has demonstrated that the microstructure typical of states after severe plastic deformation (SPD) is observed in the areas where materials in solid are welded. These are mesoscopic-level defects: fragmented deformation microbands with high number density of microscopic-scale defects, dislocations, and a cellular microstructure. The sizes of individual deformation bands generally varied in a range of 200–400 nm, which well enough correlates with the distance between dents at the bonding interface. This gives grounds to presume that the bands can play an important role in the explosion welding processes. Near the bonding zone, finely dispersed precipitates of Ti4Fe2O are found in titanium, as well as iron carbides of Fe3C—in steel area.
Databáze: OpenAIRE
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