Duplex structure

3 cases · 7 images

Crevice Corrosion in a Subsea System — Aspect Before Analysis

Standard: ASTM Capture method: Optical Microscope clear all

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Micrography of a transverse section of the pipe, presenting a refined duplex structure. The ferrite is blue/red and the austenite is white/yellow.
95
VIEW
ML00150 / Dec.2018
Vibration Induced Fatigue in a SS Oil Piping
M - Duplex Stainless SteelP - PipingAp - FPSOCd - Vibration Induced Fatigue
Cm - NaOH Electrolytic Etched MicroDf - Duplex structure
Duplex grain size structure, austenitic. The small grains are probably due to the arresting effect of the delta phase during fabrication in high temperature.
47
VIEW
ML00041 / Jun.2017
Fatigue Fracture of Inconel 718 Spline Shaft
M - NiCrFe AlloyP - ShaftAp - Oil and GasCd - Vibration Induced Fatigue
Cm - Kalling Etched Micrography by OMDf - Duplex structure
Micrographic detail of the flange microstructure in the longitudinal section. The flange is ferritic austenitic, presenting 70% of austenite. In the ferrite network there are evidences of precipitation/formation of detrimental phases.
113
VIEW
ML00002 / Jan.2018
Preferential Dissolution and Cracks in SDSS
M - Super Duplex Stainless SteelP - Fabrication WeldAp - PipingCd - Preferential Dissolution
Cm - NaOH Electrolytic Etched MicroDf - Duplex structure

More from these cases

ML00150 — Vibration Induced Fatigue in a SS Oil PipingM - Duplex Stainless SteelP - PipingAp - FPSOCd - Vibration Induced Fatigue
Micrography of a transverse section of the pipe, presenting a refined duplex structure. The ferrite is blue/red and the austenite is white/yellow.
88
VIEW
ML00150 / Dec.2018
Vibration Induced Fatigue in a SS Oil Piping
M - Duplex Stainless SteelP - PipingAp - FPSOCd - Vibration Induced Fatigue
Cm - NaOH Electrolytic Etched MicroDf - Duplex structure
Micrography of a transverse section of the fititng, presenting a coarser structure. The ferrite is blue/red and the austenite is white/yellow.
81
VIEW
ML00150 / Dec.2018
Vibration Induced Fatigue in a SS Oil Piping
M - Duplex Stainless SteelP - PipingAp - FPSOCd - Vibration Induced Fatigue
Cm - NaOH Electrolytic Etched MicroDf - Duplex structure
Micrography of a transverse section of the fititng, presenting a coarser structure. The ferrite is red/orange and the austenite is white/yellow.
80
VIEW
ML00150 / Dec.2018
Vibration Induced Fatigue in a SS Oil Piping
M - Duplex Stainless SteelP - PipingAp - FPSOCd - Vibration Induced Fatigue
Cm - Nital Etched Micrography by OMDf - Duplex structure
ML00002 — Preferential Dissolution and Cracks in SDSSM - Super Duplex Stainless SteelP - Fabrication WeldAp - PipingCd - Preferential Dissolution
Micrographic detail of the flange microstructure in the longitudinal section. The flange is ferritic austenitic, presenting 70% of austenite. In the ferrite network there are evidences of precipitation/formation of detrimental phases.
100
VIEW
ML00002 / Jan.2018
Preferential Dissolution and Cracks in SDSS
M - Super Duplex Stainless SteelP - Fabrication WeldAp - PipingCd - Preferential Dissolution
Cm - NaOH Electrolytic Etched MicroDf - Duplex structure