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Heat-affected zone

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820013
EISBN: 978-1-62708-339-3
... of the weld and heat-affected zone (HAZ), solid-state phase transformations during welding, control of toughness in the HAZ, the effects of preheating and postweld heat treatment, and weld discontinuities. This chapter provides information on the classification of steels and the welding characteristics...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270080
EISBN: 978-1-62708-301-0
... appears to be a brittle fracture that initiated from a zone of poor-quality weld. It also provides photographic evidence of a weld crack in the heat-affected zone and includes a drawing of a modified weld design that passed subsequent testing. fractography metallography tie rod visual examination...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090359
EISBN: 978-1-62708-266-2
... nondestructive evaluation (NDE) techniques because of its treelike branching pattern and its location in the heat-affected zone within the weld. As the chapter explains, by optimizing excitation and reflected waveforms, switching to dual-element sensing, properly orienting the scanning path, and using crack-tip...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030089
EISBN: 978-1-62708-282-2
...Abstract Abstract This chapter describes issues related to corrosion of carbon steel weldments and remedial measures that have proven successful in specific cases. The forms of corrosion covered includes preferential heat affected zone corrosion, preferential weld metal corrosion, and galvanic...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560309
EISBN: 978-1-62708-291-4
... Fig. 11.1 A representative example of a section of a fusion weld illustrating the terminology used to identify features of the weld. The locations of a number of isotherms in the heat-affected zone in the parent metal are also indicated. Fig. 11.2 Brazed and braze-welded joints...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220475
EISBN: 978-1-62708-259-4
..., and the heat-affected zones can be seen in both bars. (c) Region marked as “L” in (b). Longitudinal cross section of the bottom bar. Deformed ferrite and pearlite. (d) Fusion zone, acicular microstructure. (e) Region marked as T in (b). Transverse cross section of the top bar. Ferrite and pearlite. The cold...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560185
EISBN: 978-1-62708-291-4
...-affected zone adjacent to a fusion weld. 3% nital. 75×. (f) Section of heat-affected zone adjacent to a fusion weld. 3% nital. 500×. (g) Scanning electron micrograph of fracture surface of heat-affected zone adjacent to a fusion weld. Arrows indicate dendritic ferns at regions shown in (f), exposed...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430325
EISBN: 978-1-62708-253-2
.... 6.147 Low-magnification views of outer surface showing (a) transverse cracks, 50×; and (b) surface surrounding the crack, 13× Fig. 6.148 ID side of the fracture surface of thin and thick tubes having network of cracks filled with oxide scales, (a) 400×, (b) 400×. Weld and heat-affected zone...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820001
EISBN: 978-1-62708-339-3
..., the corrosion resistance of autogenous welds and welds made with matching filler metal may be inferior to that of properly annealed base metal because of: Microsegregation Precipitation of secondary phases Formation of unmixed zones Recrystallization and grain growth in the weld heat-affected...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290099
EISBN: 978-1-62708-306-5
... either the arc column or the metal surface to the environment surrounding the plate. Three metallurgical zones are formed in the plate upon completion of the thermal cycle: the weld metal zone, the heated-affected zone (HAZ), and the base metal zone. The peak temperature and the subsequent cooling rates...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290079
EISBN: 978-1-62708-306-5
... that is much lower than that required in arc welding. This ability to achieve a high weld depth-to-width ratio eliminates the need for multipass welds, as is required in conventional arc welding. The lower heat input results in a narrow workpiece heat-affected zone and noticeably less thermal effects...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410439
EISBN: 978-1-62708-265-5
... are often given post-weld heat treatments to relieve residual stresses developed during welding, and during those heat treatments cracking may develop in the coarse-grain heat-affected zones or welds of low-carbon steels as a consequence of the relief of the residual stresses. This type of cracking...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480265
EISBN: 978-1-62708-318-8
... proper cleaning, welding procedures, and filler metals. Often, filler metals with low interstitials are used to improve weld ductility. To control contamination, weld-fusion and heat-affected zones must be protected from contact with active elements and compounds, including all known refractories...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430290
EISBN: 978-1-62708-253-2
... sides. (b) ID surface view showing black adherent scale Fig. 6.112 SEM image of rupture lip surface, 1000× Fig. 6.124 SEM micrographs. (a) OD edge with a deep crack at heat-affected zone, 50×. (b) Intergranular cracking network on brittle fracture surface, 250× Fig. 6.125...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080423
EISBN: 978-1-62708-304-1
... intergranular cracks at the cross section of a fractured stud. Source: Ref 46 Fig. 16.10 Intergranular cracking in the heat-affected zone of a weld joint for Type 304 pipe that was contaminated with zinc-rich paint when welding was performed. Source: Ref 50 Fig. 16.5 Weight loss...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610263
EISBN: 978-1-62708-303-4
... of notch locations for toughness testing of weld metals (a and b) and heat-affected zone (HAZ) (c through g). Source: Ref 16 Fig. 4 Stress concentration factor ( K t ) versus bolt diameter for bolts with standard metric threads. Source: Ref 6 Fig. 29 Effects of (a) loading rate, (b...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080379
EISBN: 978-1-62708-304-1
... Institute , April 1975 22. Nawrocki J.G. , DuPont J.N. , Robino C.V. , and Marder A.R. , The Stress-Relief Cracking Susceptibility of A New Ferritic Steel—Part 1: Single-Pass Heat-Affected Zone Simulations , Weld. J. , Dec 2000 , p 355s 23. Nawrocki J.G...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030003
EISBN: 978-1-62708-282-2
...-melted zones, and the heat affected zone (HAZ). These zones can be reheated and altered by subsequent weld passes in multipass welding. For alloys with structures that depend strongly on thermal history, such as steels, the final microstructure can be extremely complex. Since welded structures are often...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290001
EISBN: 978-1-62708-306-5
... from the parent metal. The three predominant zones in a fusion weld are the fusion zone, a heat-affected zone (HAZ), and the base metal as shown in Fig. 1.3 . The weld deposit itself will have a cast structure of often a complex composition. Between the weld deposit and the parent metal is an HAZ...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270191
EISBN: 978-1-62708-301-0
..., etched in picric acid, and examined in an optical microscope. The blades showed heat-affected zones (HAZs) at the inlet tip as shown by the difference in etching behavior. This zone had a width of about 10 mm and showed considerably higher hardness than the rest of the section. The HAZ showed...