1-20 of 496 Search Results for

grain boundary corrosion

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310027
EISBN: 978-1-62708-286-0
... Abstract This chapter explores the behavior of stainless steel in media that promote corrosion. The forms of corrosion covered are uniform corrosion, atmospheric corrosion, localized corrosion, pitting corrosion, crevice corrosion, and grain boundary corrosion. The chapter discusses...
Image
Published: 01 January 2000
Fig. 45 Intergranular corrosion of sensitized HAZ grain boundaries and methods for its prevention. The four different panels were joined by welding and then exposed to a hot solution of nitric-hydrofluoric acid (HNO 3 -HF). Weld decay, such as that shown in the type 304 steel (bottom right More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000111
EISBN: 978-1-62708-313-3
... also prevent selective attack, which occurs along grain boundaries and at the interface between carbides and matrix, close to any exposed surface ( Ref 1 ). 6.1.1 Resistance to Hot Corrosion Generally, if hot corrosion is expected to be the principal form of environmental attack, it is desirable...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.caaa.t67870063
EISBN: 978-1-62708-299-0
... how the two forms of corrosion are related to stress-corrosion cracking. aluminum-copper alloys aluminum-magnesium alloys exfoliation corrosion intergranular corrosion IN INTERGRANULAR CORROSION and in exfoliation corrosion, the grain boundaries of the corroded metal become anodic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000203
EISBN: 978-1-62708-312-6
... precipitates of chromium nitrides within grains and chromium nitride precipitated along grain boundaries. A heavier concentration of nitrides is seen at the surface of the part (left side) which indicates nitride formation occurred due to slow cooling in a nitrogen bearing atmosphere Corrosion of PM...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220551
EISBN: 978-1-62708-259-4
... (duplex), and precipitation hardening stainless steels. It also describes solidification sequences and explains how chromium carbides may segregate to grain boundaries at certain temperatures, making grain boundary regions susceptible to intercrystalline or intergranular corrosion. austenitic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030070
EISBN: 978-1-62708-282-2
... and processing specifics, the intergranular (IG) corrosion and stress-corrosion cracking (SCC) resistance of 2 xxx alloys can vary significantly. The basic mechanism is galvanic interaction between the grain boundary region and the interior grain matrix ( Ref 2 , 3 ). Consider alloy 2024 in the solution heat...
Image
Published: 01 August 1999
Fig. 11 Exfoliation corrosion of an aluminum alloy stabilizer bracket. (a) Heavy surface corrosion on the stabilizer bracket. (b) Cross section through the bracket showing corroded surface grains and corrosion of grain boundaries of elongated grains More
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 these circumstances, the grain-boundary chemistry and the pit chemistry were such that intergranular corrosion was favored. Crack propagation was also by intergranular SCC in these cases. Although the local stresses and strain rates at the base of the pit play a role in SCC initiation, there are examples...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030126
EISBN: 978-1-62708-282-2
... phases present in the matrix and at the grain boundaries, composition of phases, grain size, grain-boundary segregation, and residual stresses Crack geometry, which includes length, width, and aspect ratio; and crack opening and crack tip closure Important Fracture Features Stress-corrosion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030167
EISBN: 978-1-62708-282-2
.... This is the case for most aluminum alloys. Alloying elements that are typically used to increase the corrosion resistance have low solubility in aluminum when alloyed using conventional techniques. Metallurgical Factors In addition to alloying, there are metallurgical factors, such as crystallography, grain...
Image
Published: 01 August 1999
Fig. 1 Comparison of pitting and intergranular corrosion morphologies. (a) Pitting-type corrosion in the surface of an aircraft wing plank from an alloy 7075–T6 extrusion. (b) Intergranular corrosion in alloy 7075–T6 plate. Grain boundaries were attacked, causing the grains to separate. Both More
Image
Published: 01 August 1999
Fig. 3 Schematic of grain boundary region in a 2 xxx alloy. Precipitation of the very high copper content precipitates on the boundary causes a copper-depleted zone on either side of the boundary. The difference in electrochemical potentials of the copper-depleted zone and the copper-rich More
Image
Published: 01 December 2015
Fig. 24 Stress-corrosion cracking behavior of nickel with phosphorus and sulfur segregation. (a) Polarization curve for nickel in 1 N H 2 SO 4 at 25 °C (77 °F). (b) Strain to failure and percent intergranular fracture for 26% phosphorus segregation at grain boundaries. (c) Strain to failure More
Image
Published: 01 January 2017
Fig. 1.26 Stress-corrosion cracking behavior of nickel with phosphorus and sulfur segregation, (a) Polarization curve for nickel in 1 NH 2 SO 4 at 25 °C (77 °F). (b) Strain-to-failure and percent intergranular fracture for 26% phosphorus segregation of grain boundaries. (c) Strain-to-failure More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930329
EISBN: 978-1-62708-359-1
... with good results. Occasionally, poor results are encountered. Metallographic examination of the corroded part will usually reveal evidence of grain boundary precipitation in the heat-affected zone ( Fig. 1 ). Fig. 1 Photomicrographs showing corrosion attack in Hastelloy C-276 (UNS N10276) caused...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090191
EISBN: 978-1-62708-266-2
... in resolution in analytical characterization. Effects of Radiation-Induced Segregation on Irradiation-Assisted Stress-Corrosion Cracking Although radiation-induced changes in composition occur in narrow regions close to grain boundaries, they significantly increase the susceptibility of a material...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130111
EISBN: 978-1-62708-284-6
...) Selective phase attack Thickness and morphology of corrosion scales May show localized distortion at surface consistent with direction of motion Identify embedded particles Microstructural change typical of overheating Multiple intergranular cracks Voids formed on grain boundaries...
Image
Published: 01 October 2012
Fig. 2.49 Exfoliation corrosion in an alloy 7178-T651 plate exposed to a seacoast environment. Cross section of the plate shows how exfoliation develops by corrosion along boundaries of thin, elongated grains. Source: Ref 2.35 More
Image
Published: 01 August 2005
Fig. 2.99 Intergranular cracks in a gas turbine disk made of 2014-6 aluminum. Note crack initiation at a corrosion pit (or pits) and branching along grain boundaries, typical of stress-corrosion failure. Source: Ref 2.73 More