1. Effect of dilution on the microstructure of AWS ER NiCrMo-14 weld overlay deposited by TIG cold wire feed process
- Author
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Jean Dille, Yuri Cruz da Silva, Émerson Mendonça Miná, and Cleiton Carvalho Silva
- Subjects
Materials science ,Nickel alloy ,Alloy ,02 engineering and technology ,engineering.material ,01 natural sciences ,lcsh:Technology ,Microestrutura ,Technologie des autres industries ,Phase (matter) ,0103 physical sciences ,lcsh:Technology (General) ,Lamellar structure ,Inconel ,Microstructure ,Diluição ,010302 applied physics ,Precipitation (chemistry) ,lcsh:T ,Mechanical Engineering ,Gas tungsten arc welding ,Metallurgy ,Metals and Alloys ,Métallurgie ,Dilution ,021001 nanoscience & nanotechnology ,TIG ,Liga de níquel ,Inconel 686 ,Mécanique sectorielle ,Mechanics of Materials ,engineering ,lcsh:T1-995 ,0210 nano-technology - Abstract
The dilution is an event that have a high influence on the microstructure and, consequently, in the properties of weld claddings. The present study evaluated the effect of dilution level on the microstructure of the fusion zone of alloy Inconel 686 weld claddings. The claddings were welded by the TIG cold wire feed process. The dilution was calculated from the geometric characteristics and based on chemical composition of the materials obtained by energy dispersive X-ray spectroscopy and optical emission spectroscopy. The microstructure of all claddings were composed by a γ-FCC matrix with some minor precipitates. These particles are called in literature as topologically closed-packed phases (TCP). These precipitates assumed several morphological aspects, being the shapeless morphology observed in more frequency in all claddings evaluated, independent of dilution level. A phase with lamellar morphology, which growth establishing an orientation relationship with the γ-FCC matrix solidification direction, was observed only in claddings with a low dilution level. In addition, a shapeless phase with a fine precipitation aggregated was observed in claddings with a high dilution level., SCOPUS: ar.j, info:eu-repo/semantics/published