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weld repair

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930179
EISBN: 978-1-62708-359-1
... Abstract This article describes the repair of weld defects and failed structures. It provides information on three factors that must first be considered before attempting a repair, namely material weldability, nature of the failure that prompted the repair, and involvement of any code...
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Published: 01 January 2017
Fig. 15.9 Schematic of weld overlay for repair of a pipe girth weld. IGSCC, intergranular stress-corrosion cracking More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480161
EISBN: 978-1-62708-318-8
... melting, electron beam hearth melting, rammed graphite mold casting, sand casting, investment casting, hot isostatic pressing, weld repair, and heat treatment -- along with related equipment, process challenges, and achievable properties and microstructures. It also explains how titanium parts...
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Published: 01 August 2018
Fig. 8.9 Macrograph of the transverse section of a steel casting for railway application. Presence of porosity in the thickest section of the part. A weld repair region can also be seen at the bottom and to the right of the figure. (see Chapter 14, “Structural Steels and Steels for Pressure More
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Published: 01 August 2018
Fig. 15.25 Region where the fatigue fracture of Fig. 15.24 started (right side) and a cross section in the axial-radial plane of the axis of Fig. 15.24 . The macrograph performed on the cut surface (left side) indicate the presence of a weld repair, with the weld-deposited metal More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120039
EISBN: 978-1-62708-269-3
... A significant difficulty related to large titanium castings is the problem of porosity. However, by use of HIP, internal soundness of titanium castings can be improved to the point that no porosity or small voids can be detected. Weld repair is used to close gross defects after HIP. Because strength...
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Published: 01 August 2018
Fig. 4.10 Macrograph of a radial section of a tram wheel that was repaired by welding. Deposited metal appears light while the heat affected zone (HAZ) (see Chapter 14, “Structural Steels and Steels for Pressure Vessels, Piping, and Boilers,” in this book) appears dark. Etchant: iodine More
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Published: 01 November 2007
Fig. 12.23 Repair welding can be performed on the corroded waterwall overlay by grinding followed by overlay welding. An alloy 625 weld overlay on the waterwall after 10 years of service in a RDF unit. Shown in the photograph are two tubes and three membranes. More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460277
EISBN: 978-1-62708-285-3
... and for providing a functionally upgraded material when a part comes in after service. Cold spray is able to perform repair and refurbishment with a faster turnaround time; it also provides solutions that do not require dealing with the thermal stresses that are a part of other repair processes, such as welding...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200220
EISBN: 978-1-62708-354-6
... with repairing castings that have been returned to the foundry Internal Failure Costs are expenses incurred in manufacturing castings that are scrapped in the foundry Rework Costs are the costs of welding casting discontinuities in the foundry Fig. 17-3 Quality cost report Quality costs...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930329
EISBN: 978-1-62708-359-1
... and for overlay cladding, service conditions during repair, and welding procedural idiosyncrasies of cobalt-base alloys. chemical composition fusion zone segregation grain boundary precipitation grain growth heat treatment heat-affected zone hot cracking nickel alloys porosity weldability...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200295
EISBN: 978-1-62708-354-6
... in an endless cycle. The cost and time can be factored in price and delivery if the number of cycles can be controlled. Castings can become trapped in a cycle of weld repair of original defects-PWHT-weld new defects-PWHT-weld new defects-PWHT-etc. The new defects after PWHT fall into two categories...
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Published: 30 November 2013
Fig. 8 (a) Catastrophic brittle fracture of a 260 in. diam solid-propellant rocket motor case made of 18% Ni, grade 250, maraging steel. The case fractured at a repaired weld imperfection during a hydrostatic pressure test. Fracture occurred at about 57% of the intended proof stress. All welds More
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Published: 01 November 2012
Fig. 26 Brittle fracture of solid rocket motor case during proof test. (a) Catastrophic brittle fracture of a 660 cm (260 in.) diameter solid propellant rocket motor case made of 18% Ni, grade 250, maraging steel. The case fractured at a repaired weld imperfection during a hydrostatic pressure More
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Published: 01 September 2005
Fig. 52 Overload failure of a bronze worm gear (example 4). (a) An opened crack is shown with a repair weld, a remaining casting flaw, and cracking in the base metal. (b) Electron image of decohesive rupture in the fine-grain weld metal. Scanning electron micrograph. Original magnification More
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Published: 01 November 2012
Fig. 6 Catastrophic brittle fracture of a 660 cm (260 in.) diameter solid propellant rocket motor case made of 18% Ni, grade 250, maraging steel. The case fractured at a repaired weld imperfection during a hydrostatic pressure test. Fracture occurred at approximately 57% of the intended proof More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090349
EISBN: 978-1-62708-266-2
... with shallow cracks, propagation is retarded or arrested. Last-pass heat-sink welding is a relatively new process and consequently has had limited application. It can be used to treat welds in operating plants as well as for repair/replacement operations. Fig. 15.7 Through-wall axial residual stresses...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820177
EISBN: 978-1-62708-339-3
... of pressure vessels are usually made from rolled plate, while nozzles are forgings. This requires that the steels have sufficient ductility for forming and are readily weldable. Weldability of steels is important not only for initial fabrication but also for future field repairs or modifications. Weld repairs...
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Published: 01 December 2018
Fig. 6.74 Close-up views of (a) OD side and (b) ID side of the tube bend showing puncture and repair weld area More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090359
EISBN: 978-1-62708-266-2
... geometric properties of the weldment make detection of intergranular SCC difficult. The weld root and the counterbore could produce ultrasonic signals that might be confused with cracking. Additionally, the large weld crown (resulting from a weld repair) could lead to the misconception that the root...