TEM Microstructure and Chemical Composition of Transition Zone Between Steel Tube and An Inconel 625 Weld Overlay Coating Produced by CMT Method
| Autor: | Marek Blicharski, Magdalena Rozmus-Górnikowska |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
lcsh:TN1-997
0209 industrial biotechnology Materials science 02 engineering and technology Overlay Welding engineering.material 020501 mining & metallurgy law.invention 020901 industrial engineering & automation Coating law Transition zone lcsh:TA401-492 Composite material Chemical composition lcsh:Mining engineering. Metallurgy CMT Metallurgy Metals and Alloys Inconel 625 martensite weld overlay coating STEM Microstructure 0205 materials engineering Martensite transition zone TEM engineering lcsh:Materials of engineering and construction. Mechanics of materials |
| Zdroj: | Archives of Metallurgy and Materials, Vol 62, Iss 2, Pp 787-793 (2017) |
| ISSN: | 2300-1909 |
| Popis: | The aim of this work was to investigate the microstructure and chemical composition of the transition zone between 16Mo3 steel and Inconel 625 weld overlay coating produced by the Cold Metal Transfer (CMT) method. Investigations were primarily carried out through transmission electron microscopy (TEM) on thin foils prepared by FIB (Focus Ion Beam).The chemical analysis demonstrated that the amount of certain elements (Fe, Ni, Cr, Mo, Nb) in the transition zone between the base material and the weld overlay changes quickly, from the composition of the steel to the composition of the composite zone. STEM and TEM investigations revealed that two areas are clearly visible in the transition zone. In the narrow band close to the fusion boundary where plates are clearly visible and theMstemperature is higher than room temperature, electron diffraction analyses show reflections of martensite and austenite. Moreover, the crystallographic relations between martensite and austenite can be described by the Kurdjumov-Sachs (K-S) relationship$\{ 110\} _{\alpha '} ||\{ 111\} _\gamma < 1\bar 11 > _{\alpha '} || < 1\bar 10 > _\gamma $). The microstructure of the part of the transition zone with anMstemperature lower than room temperature as well as that of the composite zone is austenite. The investigations proved that the width of the martensitic area can be significantly limited by using the CMT technique for weld overlaying. |
| Databáze: | OpenAIRE |
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