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Published: 01 December 1984
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Published: 01 December 1984
Figure 3-53 Delta ferrite in AISI 312 weld metal revealed using 10% oxalic acid, 6 V dc, 10 s, 750×.
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Published: 01 December 1984
Figure 3-57 Detection of small amounts of delta ferrite in an austenitic stainless steel using Ferrofluid. (Courtesy of R. J. Gray and R. S. Crouse, Oak Ridge National Laboratory.)
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Published: 01 December 1984
Figure 3-58 Use of Ferrofluid to reveal the substructure of delta ferrite in austenitic stainless steel. (Courtesy of R. J. Gray and R. S. Crouse, Oak Ridge National Laboratory.)
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in Stainless Steels
> Metallography of Steels: Interpretation of Structure and the Effects of Processing
Published: 01 August 2018
Fig. 16.7 Quenched and tempered F6NM stainless steel. Delta ferrite islands in a matrix of tempered martensite. Etchant: Kalling. Courtesy of A. Zeemann, Tecmetal, Rio de Janeiro, Brazil.
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in Stainless Steels
> Metallography of Steels: Interpretation of Structure and the Effects of Processing
Published: 01 August 2018
Fig. 16.21 AISI 304 steel, as-cast ingot. Delta ferrite in an austenitic matrix. (a) Etchant: oxalic acid. (b) Etchant: glyceregia. Courtesy of Villares Metals S.A., Sumaré, SP, Brazil.
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in Petroleum Reactor Pressure-Vessel Materials for Hydrogen Service
> Damage Mechanisms and Life Assessment of High-Temperature Components
Published: 01 December 1989
Fig. 7.34. Crack propagation through delta ferrite and sigma phases in type 347 stainless steel weld-metal cladding ( Ref 39 ).
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in The Metallurgical Microscope
> Metallographer’s Guide: Practices and Procedures for Irons and Steels
Published: 01 March 2002
Fig. 5.60 Micrograph of the delta ferrite (dark) in the welded area of the AISI 316 stainless steel specimen in Fig. 5.58 . Electrolytic etch (10% oxalic acid in water, stainless steel cathode). 1000×
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in The Art of Revealing Microstructure
> Metallographer’s Guide: Practices and Procedures for Irons and Steels
Published: 01 March 2002
Fig. 8.47 Delta ferrite stringers in an AISI/SAE 316 austenitic stainless steel. Electrolytically etched with 60% nitric acid and 40% water using a stainless steel cathode at 10 V. 500×
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in Case Studies of Powder-Binder Processing Practices
> Binder and Polymer Assisted Powder Processing
Published: 30 April 2020
Fig. 10.14 Data for the sintered porosity and delta ferrite content in heat treated 17-4 PH after sintering for 60 min at various hold temperatures in hydrogen. The results include gas- and water-atomized powders. Source: Blaine et al. ( Ref 8 , 9 , 10 )
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Published: 01 December 1995
Fig. 20-14 Transformation of delta ferrite to austenite plus sigma upon exposure of a solution treated CF-8 casting to elevated-temperatures
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in The Metallographer and the Metallographic Laboratory
> Metallographer’s Guide: Practices and Procedures for Irons and Steels
Published: 01 March 2002
Fig. 4.19 The stress-corrosion cracks in Fig. 4.18 are shown following delta ferrite stringer in the austenite matrix. Electrolytically etched in 10% oxalic acid solution at 5 V. 200×
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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430107
EISBN: 978-1-62708-253-2
... spectroscopy. It explains how the tools work and what they reveal. It also covers the topic of image analysis and its application in the measurement of grain size, phase/volume fraction, delta ferrite and retained austenite, inclusion rating, depth of carburization/decarburization, scale thickness, pearlite...
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in The Art of Revealing Microstructure
> Metallographer’s Guide: Practices and Procedures for Irons and Steels
Published: 01 March 2002
Fig. 8.48 Duplex AISI/SAE 2205 stainless steel showing delta phase (dark) and ferrite. Electrolytically etched with potassium hydroxide solution using a stainless steel cathode at 3 V. 200×
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in Case Studies of Powder-Binder Processing Practices
> Binder and Polymer Assisted Powder Processing
Published: 30 April 2020
Fig. 10.10 Relative phase content at various sintering temperatures is indicated by the tie lines on the phase diagram for 17-4 PH stainless steel. Illustrated here are the tie lines at a carbon content of 0.036%. At this concentration, first delta ferrite forms near 1270 °C (2320 °F). By 1325
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in Stainless Steels
> Metallography of Steels: Interpretation of Structure and the Effects of Processing
Published: 01 August 2018
Fig. 16.8 Fe-Cr phase equilibrium diagram. In the Fe-C diagram, the two single-phase fields where BCC (ferrite) occurs are named α (alpha) and δ (delta), due to a rule in the construction of phase diagrams according to which two isolated single-phase fields must be identified by different
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in Case Studies of Powder-Binder Processing Practices
> Binder and Polymer Assisted Powder Processing
Published: 30 April 2020
Fig. 10.13 Sintering time and temperature maps showing the sintered density and delta ferrite contents using gas-atomized powder. Source: Julien et al. ( Ref 3 )
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in Case Studies of Powder-Binder Processing Practices
> Binder and Polymer Assisted Powder Processing
Published: 30 April 2020
Fig. 10.6 Comparison of measured tensile strength (square symbols) and surface-diffusion-predicted strength evolution (model) for 60 min sintering in hydrogen at various temperatures. Experimental data are scattered due to factors such as delta ferrite content and grain size effects.
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Published: 01 December 1984
Figure 3-9 Heat tinting at 1100°F (593°C) for 5 min was used to color phases in austentic stainless steel weld metal (preetched with Vilella’s reagent). Austenite colored (blue) more rapidly than delta ferrite (cream-white), 150 ×.
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in Case Studies of Powder-Binder Processing Practices
> Binder and Polymer Assisted Powder Processing
Published: 30 April 2020
Fig. 10.3 Microstructure of 17-4 PH water quenched from 1260 °C (2300 °F) during hydrogen sintering, showing emergence of white delta ferrite colonies. The dark regions are mostly pores, although some small circular oxide inclusions are present.
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