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crack morphology

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090257
EISBN: 978-1-62708-266-2
... to composition, microstructure, and heat treatment. It describes the types of environments where magnesium alloys are most susceptible to SCC and the effect of contributing factors such as temperature, strain rate, and applied and residual stresses. The chapter also discusses crack morphology and what it reveals...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080379
EISBN: 978-1-62708-304-1
...) and frequencies are high enough, the metal can eventually fail by thermal fatigue cracking. The morphology of thermal fatigue cracking is generally very well defined and easily identified. The subject of thermal fatigue cracking has been extensively discussed in the literature and is not covered in this chapter...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090419
EISBN: 978-1-62708-266-2
... Abstract This chapter describes nondestructive evaluation (NDE) test methods and their relative effectiveness for diagnosing the cause of stress-corrosion cracking (SCC) service failures. It discusses procedures for analyzing various types of damage in carbon and low-alloy steels, high-strength...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090191
EISBN: 978-1-62708-266-2
... as: Intergranular cracking morphology was predominant. Initiation occurred on the water side, and multiple branching cracks were observed. In contrast, only ductile, transgranular cracking was observed in post-irradiation mechanical tests performed in inert environments and at various temperatures and strain...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090349
EISBN: 978-1-62708-266-2
... weldments has been confined largely to the heat-affected zone (HAZ). The cracking morphology is intergranular, following the sensitized grain boundaries in the HAZ. In some of the pipe weldments, intergranular SCC penetrates the weld metal, but there have been no reported weld failures. In general...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030126
EISBN: 978-1-62708-282-2
... Abstract This chapter focuses on stress-corrosion cracking (SCC) of metals and their alloys. It is intended to familiarize the reader with the phenomenological and mechanistic aspects of stress corrosion. The phenomenological description of crack initiation and propagation describes well...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090271
EISBN: 978-1-62708-266-2
... Abstract Titanium alloys are generally resistant to stress-corrosion cracking (SCC), but under certain conditions, the potential for problems exists. This chapter identifies the types of service environments where titanium alloys have exhibited signs of SCC. It begins by describing the nominal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090001
EISBN: 978-1-62708-266-2
... Abstract This chapter discusses the conditions and sequence of events that lead to stress-corrosion cracking (SCC) and the mechanisms by which it progresses. It explains that the stresses involved in SCC are relatively small and, in most cases, work in combination with the development...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480113
EISBN: 978-1-62708-318-8
... morphology on ductility and toughness is rationalized in Fig. 6.6 . The lenticular morphology causes the crack path to be more tortuous, giving higher toughness, while equiaxed (or globular) alpha results in larger plastic zones and higher ductility. Table 6.1 Effect of alpha morphology on titanium...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090221
EISBN: 978-1-62708-266-2
... from an α-β brass, exhibited SCC in potable water service. The fracture morphology is mixed mode, consisting of transgranular cracking through the β phase and intergranular cracking at the α-β interface. One study indicates that a small amount of arsenic, 2%, increases the SCC susceptibility...
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
... information on mixed fracture morphology. brittle fracture embrittlement ferrous alloys macroscale characteristics microstructure mixed fracture morphology THE TERMS BRITTLE AND DUCTILE , as used here and in the following chapter, refer to the extremes of metal behavior in single loading...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030082
EISBN: 978-1-62708-282-2
... 35. Szot J. , Young D.J. , Bourdillon A. , and Easterling K.E. , Cellular Morphologies in a De-Alloying Residue , Philos. Mag. Lett. , Vol 55 , 1987 , p 109 – 114 10.1080/09500838708228741 36. Sieradzki K. and Newman R.C. , Stress Corrosion Cracking...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770051
EISBN: 978-1-62708-337-9
... Abstract This chapter discusses the formation of free carbides and their effect on case-carburized components. It explains how alloying elements influence the composition and structure of carbide phases produced at cooling rates typical of carburizing process. It describes the morphology...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280091
EISBN: 978-1-62708-267-9
... scrap. Problems with forgings can arise from many sources. Poor grain size control, grain size banded areas, poor carbide or second-phase morphology/distribution, internal cracking, and surface cracking are among the sources for rejection of forged parts. Figures 6.11 and 6.12 show some surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560125
EISBN: 978-1-62708-291-4
... and the morphology of manganese sulfide inclusions in castings. carbon content inclusions pearlite proeutectoid cementite proeutectoid ferrite We have now dealt with the structures of annealed and normalized steels containing up to about 0.25% C. The pearlite constituent becomes increasingly dominant...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000025
EISBN: 978-1-62708-313-3
... Abstract The microstructure of superalloys is highly complex, with a large number of dispersed intermetallics and other phases that modify alloy behavior through their composition, morphology, and distribution. This chapter provides an overview of the most notable phases, including the matrix...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2016
DOI: 10.31399/asm.tb.ascaam.t59190001
EISBN: 978-1-62708-296-9
... Abstract This chapter serves as a study and guide on the main phase constituents of cast aluminum-silicon alloys, alpha-Al solid solution and Si crystals. The first section focuses on the structure of Al-Si castings in the as-cast state, covering the morphology of the alpha-Al solid solution...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1984
DOI: 10.31399/asm.tb.mpp.t67850410
EISBN: 978-1-62708-260-0
.... It provides examples showing how the various features appear, how they are measured, and how the resulting data are converted into usable form. The chapter also discusses the quantification of fracture morphology and its correlation with material properties and behaviors. grain morphology grain...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130503
EISBN: 978-1-62708-284-6
... of several areas of the fracture surface revealed only iron, manganese, and oxygen. The pipe fractured due to fatigue cracks that initiated at several locations at the toe of the weld. The fatigue cracks propagated until there was insufficient cross section to support the service loads. The morphology...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420303
EISBN: 978-1-62708-310-2
... the formation of martensite and bainite in steel and other alloys. It describes the morphology of both types of structures, the factors that influence their formation, how they respond to tempering processes, and their effect on mechanical properties and behaviors. It also discusses the role of transformation...