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Transgranular corrosion

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Published: 01 January 2017
Fig. 18.2 Typical evidence of feathery transgranular stress-corrosion cracking (SCC) rupture in an 18Cr-9Ni austenitic stainless steel in a hot MgCl 2 solution. Original magnification: 2100×. Source: Ref 18.7 More
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Published: 01 December 2015
Fig. 8 Transgranular near-neutral-pH stress-corrosion crack in Nital etchant. Original magnification: 100× More
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Published: 01 July 2000
Fig. 7.105 Single, straight, transgranular stress-corrosion crack with only microscopic branches. Conditions can be found in Fig. 7.104 . Source: Ref 165 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090419
EISBN: 978-1-62708-266-2
.... It represents a major form of corrosion failure and has a complex dependence on various mechanical, electrochemical, and metallurgical factors. Stress-corrosion cracks can be transgranular, intergranular, or both and may grow gradually over a period of time until they reach a critical size, resulting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090257
EISBN: 978-1-62708-266-2
... in this chapter. 9.9 Crack Morphology Although both transgranular and intergranular crack propagation have been observed, SCC in magnesium alloys is usually transgranular, with significant secondary cracking (branching). Initiation of these cracks invariably occurs at corrosion pits ( Ref 9.39 , 9.47...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090221
EISBN: 978-1-62708-266-2
... susceptibility increased with increasing anodic polarization, as did the dissolution rate of the specimens. No cracking was observed at the free corrosion potential. In these tests, the specimens were tarnish-free and the failure mode was transgranular. Based on this work, it was concluded that the role...
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Published: 01 August 2005
is predominantly transgranular. Intergranular fracture at (and in the vicinity of) the corrosion pit is apparent. Source: Ref 3.37 More
Image
Published: 01 January 2017
stress-corrosion cracking; TGSCC, transgranular stress-corrosion cracking More
Image
Published: 01 August 2005
Fig. 2.29 Surface of a fracture in type 316 stainless steel resulting from SCC by exposure to a boiling solution of 42 wt% MgCl 2 . The fracture in general exhibited the fan-shaped or feather-shaped transgranular cleavage features shown in (a). In a hasty scrutiny, the presence of local areas More
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Published: 01 August 2005
Fig. 14 Micrograph, original magnification at 200×, of a transverse section from a specimen of austenitic stainless steel, showing a branching, transgranular stress-corrosion crack More
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Published: 01 January 2017
Fig. 9.3 Stress-corrosion cracking in an extruded Mg-6Al-1Zn alloy tested in a salt-chromate solution, showing (a) intergranular crack propagation in the furnace-cooled alloy and (b) transgranular propagation in the water-quenched material. Source: Ref 9.26 More
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Published: 01 August 2005
Fig. 2.98 Stress-corrosion cracking in an extruded Mg-6Al-1Zn alloy tested in a salt-chromate solution. (a) Intergranular crack propagation in the face-cooled alloy. (b) Transgranular crack propagation in the water-quenched material. Source: Ref 2.72 More
Image
Published: 01 December 2015
Fig. 11 Potentiokinetic polarization curve and electrode potential values at which intergranular and transgranular stress-corrosion cracking appear in a 10% NaOH solution at 288 °C (550 °F). (a) Alloy 600. (b) Alloy 800. (c) AISI type 304 stainless steel More
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Published: 01 November 2012
Fig. 37 Examples of cleavage fractures. (a) Feather pattern on a single grain of a chromium steel weld metal that failed by cleavage. (b) Cleavage steps in a Cu-25at.%Au alloy that failed by transgranular stress-corrosion cracking. Courtesy of B.D. Lichter, Vanderbilt University. Source: Ref More
Image
Published: 01 January 2017
Fig. 18.3 Stress-corrosion cracking in an austenitic stainless steel (0.1% C, 1% Si, 2% Mn, 18% Cr, 10% Ni, 2% Mo, 0.6% Ti) caused by MgCl 2 solution at approximately 100 °C (212 °F). Transgranular rupture reveals feathery pattern. Original magnification: 5500×. Source: Ref 18.7 More
Image
Published: 01 December 2015
of the tank. 25×. 10% oxalic acid etch. (b) Higher-magnification view of cracks. These branched transgranular cracks are typical of chloride stress-corrosion cracking of austenitic stainless steel. 250×. 10% oxalic acid etch. Source: Ref 39 More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030126
EISBN: 978-1-62708-282-2
... such as stainless steel. Zones 1 and 2 are those in which transgranular stress-corrosion crack growth is most likely to occur; intergranular stress-corrosion crack growth can occur over a wider range of potentials than these two zones can. Transgranular SCC occurs in zone 1 because the material is in transition...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270025
EISBN: 978-1-62708-301-0
... of a crack, whether it is intergranular or transgranular, and branched or not branched, will be clear in the microstructure. Cracks due to stress corrosion, hydrogen embrittlement, and liquid metal embrittlement are generally intergranular with some exceptional situations. Fatigue cracks are transgranular...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090001
EISBN: 978-1-62708-266-2
... . In recent years, the number of such combinations has increased. Added to this list are the transgranular SCC of copper, the intergranular SCC of pure metals such as iron and nickel, and the SCC of materials in high-purity water in the absence of specific anions. Stress-corrosion cracking of pure metals...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090303
EISBN: 978-1-62708-266-2
...; DCB, double cantilever beam. (c) IG, intergranular; TG, transgranular 11.1.1 Aqueous Solutions Oxidizing Chloride Solutions It has long been known that zirconium is one of the few metals that resist attack by highly reducing corrosives such as HCl ( Ref 11.22 , 11.23 ). Zirconium...