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welding defects

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430351
EISBN: 978-1-62708-253-2
... defects, forming and welding defects, design defects, improper cleaning methods, and ineffective maintenance. It also includes case studies and illustrations. boiler tubes chemical cleaning design defects forming defects material defects quality control welding defects The main...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610585
EISBN: 978-1-62708-303-4
... Abstract This appendix provides detailed information on design deficiencies, material and manufacturing defects, and service-life anomalies. It covers ingot-related defects, forging and sheet forming imperfections, casting defects, heat treating defects, and weld discontinuities. It shows how...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720411
EISBN: 978-1-62708-305-8
.../Incomplete penetration Gas metal arc welding (GMAW) Porosity Incomplete fusion/Incomplete penetration Gas tungsten arc welding (GTAW) Porosity The commonly encountered inclusions, as well as cracking, the most serious of weld defects, will be discussed in this section...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720293
EISBN: 978-1-62708-305-8
... inspection. Casting defects including porosity, oxide films, inclusions, hot tears, metal penetration, and surface defects are reviewed. Liquid penetrant inspection, magnetic particle inspection, eddy current inspection, radiographic inspection, ultrasonic inspection, and leak testing for castings are...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720021
EISBN: 978-1-62708-305-8
... drawing tolerances for the part and design information such as safety factors. Once a decision is made, it is necessary to determine if welding repair is necessary or if the part can be used as is, with the defects ground out. Welds may cause a new set of problems. If the weld can be avoided, feather...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720001
EISBN: 978-1-62708-305-8
... perpendicular to x-ray film. Pipeline welds for penetration, inclusions, and voids; internal defects in castings Visual optical Surface characteristics such as finish, scratches, cracks, or color; strain in transparent materials; corrosion Often convenient; can be automated Can be applied only to...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720365
EISBN: 978-1-62708-305-8
... temperature. Bursts can also occur during the forging operation. A number of surface flaws can be produced by the forging operation. These flaws are often caused by the movement of metal over or upon another surface without actual welding or fusing of the surfaces; such flaws may be laps or folds...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720267
EISBN: 978-1-62708-305-8
... Welds: slag inclusions, porosity, incomplete fusion, incomplete penetration, dropthrough, suckback, cracks in filler metal and base metal Tubing and pipe: circumferential and longitudinal cracks Fatigue cracks, stress-corrosion cracks Dual element, contact Immersion Plate and sheet: thickness...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720321
EISBN: 978-1-62708-305-8
... welded together in spots. Seams may be continuous or intermittent, as indicated in Fig. 2(h) . A micrograph of a typical seam is shown in Fig. 3 . Fig. 3 Micrograph of a seam in a cross-section of a 19 mm (¾ in.) diameter medium carbon steel bar showing oxide and decarburization in the seam. 350...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720183
EISBN: 978-1-62708-305-8
... inspection. The major limitation of liquid penetrant inspection is that it can detect only imperfections that are open to the surface; some other method must be used to detect subsurface defects and discontinuities. Another factor that can inhibit the effectiveness of liquid penetrant inspection is the...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720063
EISBN: 978-1-62708-305-8
... as an in-process gaging tool for controlling the process and correcting trends that could lead to the production of defective parts. Consequently, manufacturers in a variety of industries have investigated this important technology, regardless of the products being manufactured. The automotive and...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720161
EISBN: 978-1-62708-305-8
... in handling specimens of difficult shapes or sizes during the subsequent steps of metallographic preparation and examination. A secondary purpose is to protect and preserve extreme edges or surface defects during metallographic preparation. The method of mounting should in no way be injurious to the...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720049
EISBN: 978-1-62708-305-8
... or rejection decisions. Although CMMs continue to play this role, manufacturers are placing new emphasis on using CMMs to capture data from many sources and bring them together centrally where they can be used to control the manufacturing process more effectively and to prevent defective components...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720233
EISBN: 978-1-62708-305-8
... F G Internal flakes P (d) P (d) U P (d) P (d) U Cracks and tears F (d) F (d) F (d) F (d) F (d) F (d) Welds Shrinkage cracks G (d) G (d) G (d) G (d) G (d) G (d) Slag inclusions G G G G G G Incomplete fusion G G G G G G Pores G G...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290099
EISBN: 978-1-62708-306-5
... stress concentration weld defects welded joints FUSION WELDING is the joining of two or more pieces of material by melting a portion of each and allowing the liquefied portions to solidify together. One distinguishing feature of all fusion welding processes is the intensity of the heat source used...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290137
EISBN: 978-1-62708-306-5
... stir-welded joints were 60% stronger than comparable riveted or resistance spot-welded joints. The stir-welded joint does not demonstrate many of the defects encountered in normal fusion welding, and the distortion is significantly less. A typical weld joint ( Fig. 6.20 ) contains a well-defined...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290023
EISBN: 978-1-62708-306-5
... Abstract Arc welding applies to a large and diversified group of welding processes that use an electric arc as the source of heat to melt and join metals. This chapter provides a detailed overview of specific arc welding methods: shielded metal arc welding, flux cored arc welding, submerged arc...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290279
EISBN: 978-1-62708-306-5
... similar-metal welds and are left in the as-welded condition. However, removing the excess penetration of the weld root eliminates possible defects that may be present in the root of the joint, and it eliminates notches and crevices associated with backing rings. Removing the weld root also improves the...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290001
EISBN: 978-1-62708-306-5
... examining the various joining processes, namely fusion welding, solid-state welding, brazing, soldering, mechanical fastening, and adhesive bonding. In addition, it provides information on several design considerations related to the joining process and selection of the appropriate process for joining...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290165
EISBN: 978-1-62708-306-5
... process temperature is relatively low, so there is no need for the heat to be applied locally, as in welding. Brazing and soldering allow considerable freedom in the dimensioning of joints, so it is possible to obtain good results even if a variety of components are used on the same product. The...