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intergranular brittle cracking

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080379
EISBN: 978-1-62708-304-1
..., such as a heavy wall construction, or a welded component, or a cold-worked structure, can be susceptible to this type of intergranular, brittle cracking for some alloys when exposed to lower end of the intermediate temperature range, such as 480 to 700 °C (900 to 1290 °F). Alloys that are susceptible to this type...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630081
EISBN: 978-1-62708-270-9
... welding, primarily alloy carbides, in the weld heat affected zone (HAZ) causing strengthening and embrittlement. Residual stresses and grain coarsening from the welding contribute to the embrittlement process. When severe, intergranular brittle cracking or reheat cracking can occur. Temper Embrittlement...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540047
EISBN: 978-1-62708-309-6
... conditions for yielding. Of course, the other important criterion of failure is fracture from either brittle or ductile cracking. Brittle and ductile fractures represent different processes of cracking, and so different fracture criteria are needed for ductile and brittle fracture under static (monotonic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610055
EISBN: 978-1-62708-303-4
... and how it appears under various levels of magnification. It also discusses the ductile-to-brittle transition observed in steel, the characteristics of intergranular fracture, and the causes of embrittlement. brittle fracture crack nucleation crack propagation ductile fracture microvoid...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030126
EISBN: 978-1-62708-282-2
... Cleavage Model Adsorption-Induced Brittle Fracture Hydrogen Embrittlement Film Rupture Thermodynamics of SCC Application of Potential-pH Diagrams Kinetics of SCC Intergranular Stress-Corrosion Cracking Transgranular Stress-Corrosion Cracking There is more commonality...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090001
EISBN: 978-1-62708-266-2
... detail in the section “Crack Propagation Mechanisms” in this chapter, but they usually assume that breaking of the interatomic bonds of the crack tip occurs either by chemical solvation and dissolution or by mechanical fracture (ductile or brittle). Mechanical fracture includes normal fracture processes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410439
EISBN: 978-1-62708-265-5
... or bending stresses, are also not sensitive to intergranular cracking. Fig. 19.16 Map of fracture modes in hardened steels produced by tensile and bending loads as a function of tempering temperature and steel carbon content. The transition from ductile to brittle intergranular fracture in low...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130043
EISBN: 978-1-62708-284-6
...Abstract Abstract This chapter provides an overview of the possible mechanisms of failure for heat treated steel components and discusses the techniques for examining fractures, ductile and brittle failures, intergranular failure mechanisms, and fatigue. It begins with a description...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630063
EISBN: 978-1-62708-270-9
... for single-load applications, and fatigue for multiple-load applications. Each of these fracture modes are discussed in this chapter. The factors affecting the ductile brittle relationship are also covered. cleavage fatigue fracture modes intergranular fracture quasi-cleavage fracture shear...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270133
EISBN: 978-1-62708-301-0
... Procedure and Results A blade of the second-stage compressor in an engine fractured in service. The fracture was in brittle mode, with intergranular facets. The blade also had cracks in other regions. The blade had unusually high hardness, and the fracture was attributed to SCC. A blade...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180151
EISBN: 978-1-62708-256-3
... the classic progression marks, frequently because of inadequate microscopic ductility (too high hardness) or because of a significant quantity of brittle or weak second-phase particles (such as graphite in cast iron). Most fatigue cracks are transgranular without marked branching, although intergranular...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130087
EISBN: 978-1-62708-284-6
... conditions actually caused the fracture. Sometimes, it can be shown that the real loading was very different from the design loading. Before leaving this subject, a review is needed on details that are often poorly understood relating to how to distinguish ductile and brittle cracks on the macroscale...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270196
EISBN: 978-1-62708-301-0
...Abstract Abstract Fastening screws used in fuel-injection pumps failed during assembly and were examined to determine the cause. Based on observations and the result SEM fractography and hardness measurements, the screws failed by brittle intergranular fracture due to hydrogen embrittlement...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060385
EISBN: 978-1-62708-261-7
... of transgranular slip (ductile fracture), transgranular brittle fracture (cleavage), or intergranular fracture (crack propagation between grains). These different types of fracture lead to distinctly different fracture surface morphologies, as seen in Fig. 16.19 . Each of these distinct features can reveal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130111
EISBN: 978-1-62708-284-6
.... This is followed by a brief review of failure types from fracture, distortion, wear, and corrosion. Fracture is a common damage feature, because the vast majority of mechanical failures involve crack propagation—typically classified as ductile, brittle, and fatigue, as briefly described in more detail. Distortion...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030148
EISBN: 978-1-62708-282-2
... and its alloys may introduce intergranular, transgranular, or quasi-cleavage cracking, and although the macroscopic features appear to be brittle, on a microscopic scale there is a high degree of local plasticity, suggesting that hydrogen enhances flow at the crack tip. Figure 15 shows the reduction...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090419
EISBN: 978-1-62708-266-2
... CuSO 4 + H 2 SO 4 solution. (a) Primary rupture plane is shown intersecting the surface. Note the secondary intergranular cracks. Original magnification: 650×. (b) Classic intergranular fracture. Original magnification: 650× Those portions of a fracture directly attributable to SCC are brittle...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130285
EISBN: 978-1-62708-284-6
... are also provided. The cases covered are grinding cracks on steel cam shaft and transgranular and intergranular crack path in commercial steels. tempering steel mechanical test temper embrittlement hydrogen embrittlement liquid-metal embrittlement isothermal heat treatment grinding cracks...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130503
EISBN: 978-1-62708-284-6
... Table 1 . Source: Ref 1 The most insidious discontinuities are those that cause brittle cracking due to metallurgical origins, such as HAC, solidification cracking, or stress-corrosion cracking. Such brittle failures are characterized by fracture surfaces exhibiting intergranular...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610501
EISBN: 978-1-62708-303-4
... to their initiation and propagation, as illustrated in Fig. 15 for intergranular SCC of 316L stainless steel. The surfaces of some stress-corrosion cracks resemble those of brittle mechanical fractures, although they are actually the result of local corrosion in combination with a tensile stress. In some metals...