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acid etching

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Published: 01 June 2019
Fig. 6 Microstructure of the “lip” shown in Fig. 4 . HCl/picric acid etch. More
Image
Published: 01 December 2019
Fig. 7 Light optical micrographs of 10% oxalic acid etched coil sample No. 1 revealing pronounced intergranular cracking, stepwise microcracking, grain dropping, and intergranular ditching in austenite microstructure of low nickel stainless steel More
Image
Published: 01 December 2019
Fig. 8 Light optical micrographs of 10% oxalic acid etched coil sample No. 2 revealing pronounced intergranular cracking, stepwise microcracking, grain dropping, and intergranular ditching in austenite microstructure of low nickel stainless steel More
Image
Published: 01 December 2019
Fig. 9 Scanning electron images of 10% oxalic acid etched coil sample No. 1 revealing pronounced intergranular cracking, stepwise microcracking, grain dropping, and intergranular ditching in austenite microstructure of low nickel stainless steel More
Image
Published: 01 December 2019
Fig. 10 Scanning electron images of 10% oxalic acid etched coil sample No. 2 revealing pronounced intergranular cracking, stepwise microcracking, grain dropping, and intergranular ditching in austenite microstructure of low nickel stainless steel More
Image
Published: 01 December 2019
Fig. 11 Secondary electron image of 10% oxalic acid etched coil sample with x-ray elemental distribution maps for C, Cr, Mn, Fe, Ni, and Cu confirming absence of sensitization More
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001298
EISBN: 978-1-62708-215-0
... of significant amounts of corrosion product and all of the pits were filled with corrosion-preventative primer. This indicated that the pitting occurred during spar manufacture, prior to the application of the primer The pitting resulted from multiple nickel plating and defective plating removal by acid etching...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048791
EISBN: 978-1-62708-234-1
... of a sectioned and oxalic acid etched sample. The grain size was found to exceed the ASTM standard. No indications of sensitization were observed during testing with practice A of ASTM A 262. Definitive evidence of contaminants to support SCC as the failure mechanism was not disclosed during analysis...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0091096
EISBN: 978-1-62708-234-1
... to an expensive gear mechanism. The rotor was subjected to severe chatter, which was an abnormal condition resulting from a series of continuous small overloads occurring at a frequency of around three per second. Investigation (visual inspection, hardness testing, and hot acid etch images) supported...
Image
Published: 01 June 2019
Fig. 7 Microstructure of the sleeve a short distance from the fracture. HCl/picric acid etch. More
Image
Published: 01 December 1993
Fig. 7 Typical cracking observed in U-bend 4T. The cracking is emanating from the internal surface. Electrolytic oxalic acid etch. 81×. More
Image
Published: 01 June 2019
Fig. 6 Cross-section through typical pitted area, interior tank face is at top Electrolytic oxalic acid etch — original magnification was 4× More
Image
Published: 01 December 2019
Fig. 14 Photomicrograph of the outside dip tube surface for gasifier no. 2, showing sulfide products and cracks along the grain boundaries (oxalic acid etched) More
Image
Published: 01 December 1992
Fig. 9 Optical micrographs of screen wires, showing a highly worked structure at crossovers. (a) Longitudinal section of wire at crossover. (b) Transverse section of undeformed wire. (c) Transverse section of deformed wire at crossover. Acid etch. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001689
EISBN: 978-1-62708-233-4
... at low and higher magnification. Etched in HCl saturated with picric acid. In (b) the globular austenite is seen in a ferrite matrix. Fig. 4 Microstructure of the shaft 10 mm from the fracture surface. Etch: HCl saturated with picric acid. Figures 5 and 6 show the section...
Image
Published: 01 December 1992
Fig. 8 Optical micrograph from a longitudinal section in the plane of the tube wall, showing orthogonal cracking that indicates the presence of biaxial stresses. The top microcrack is along the transverse direction, and the smaller vertical crack is in the longitudinal direction. Oxalic acid More
Image
Published: 01 December 1992
Fig. 4 Corrosion at inner surface of inconel 600, showing intergranular cracks that proceeded from the corroded areas (Location D from Fig. 1 ). (a) Cross section of through-wall intergranular crack in the fin. (b) Corroded area and intergranular cracking at inner surface of the fin. Acid More
Image
Published: 01 December 1993
at which the initial cracking ends (open arrow) is shown more clearly in Fig. 8 . Acid etched. 4.70× More
Image
Published: 01 June 2019
Fig. 5 Microstructure of the core of an undamaged wire. Etched in alc. picric acid. 500 × More
Image
Published: 01 June 2019
Fig. 3 a). Etched in aqueous nitric acid 1:1 at 2 V for 3 min. Crack propagation, cross-section (Same area after different etching treatments). 200 × b). Etched in V 2 A pickling solution (50 ° C). Crack propagation, cross-section (Same area after different etching treatments). 200 × More