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weld characterization

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Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001061
EISBN: 978-1-62708-214-3
... in the welds and heat-affected zones (HAZs). Fracture/crack morphology was brittle and primarily intergranular and deposits at crack tips were primarily iron oxides with significant amounts of sodium compounds. On these bases, the cracking was characterized as intergranular stress-corrosion cracking (IGSCC...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001128
EISBN: 978-1-62708-214-3
...Abstract Abstract Creep crack growth and fracture toughness tests were performed using test material machined from a seam welded ASTM A-155-66 class 1 (2.25Cr-1Mo) steel steam pipe that had been in service for 15 years. The fracture morphology was examined using SEM fractography. Dimpled...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001777
EISBN: 978-1-62708-241-9
... for determining the causes of crack initiation at the welded joint. Mechanical and Microstructural Characterization As described before, the investigation of the root cause of the structural collapse suggests that the rupture of one of the connections of the RHS member was responsible for the load...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001011
EISBN: 978-1-62708-229-7
... in which failure took place was 50.8 mm in diam with a nominal wall thickness of 8 mm. It connected to the AISI 321 superheater tube by means of a butt weld and was one of 46 such parallel connecting tubes. The Cr-Mo tubing was situated outside the heat transfer zone of the superheater. The overall...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006768
EISBN: 978-1-62708-295-2
... Measurement by X-Ray Diffractometry , U.S. Patent 4,561,062 , 1985 39. Belassel M. , Brauss M.E. , and Pineault J.A. , “ Residual Stress Characterization Using X-Ray Diffraction Techniques, Applications on Welds ,” American Society of Mechanical Engineers Conference (Atlanta) , 2001...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001611
EISBN: 978-1-62708-219-8
.... , and Wilson K. : “Fatigue Characterization of Fabricated Ship Details for Design,” SSC-318, Ship Structure Committee, 1983 . 2. AWS D1.1, Structural Welding Code for Steel , American Welding Society , Miami, FL , 2000 . 3. Fleming M.A. : “Following Failure to Success,” Pr. Fail...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006758
EISBN: 978-1-62708-295-2
...Abstract Abstract The goal of using nondestructive evaluation (NDE) in conjunction with failure analysis is to obtain the most comprehensive set of data in order to characterize the details of the damage and determine the factors that allowed the damage to occur. The NDE results can be used...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001675
EISBN: 978-1-62708-220-4
...Abstract Abstract The failure of a reformer tube furnace manifold has been examined using metallography. It has been shown that the cause of failure was thermal fatigue; the damage was characterized by the presence of voids produced by creep mechanisms operating during the high temperature...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003528
EISBN: 978-1-62708-180-1
..., Applications on Welds,” American Society of Mechanical Engineers Conference ( Atlanta ), 2001 31. Pineault J.A. , Brauss M.E. , and Eckersley J.S. , Residual Stress Characterization of Welds Using X-Ray Diffraction Techniques , Welding Mechanics and Design , American Welding...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001322
EISBN: 978-1-62708-215-0
... the steam-iron reaction. (Eq 1) 3 Fe + 4 H 2 O ↔ Fe 3 O 4 + 4 H 2 The source of steam was from the cracked fillet weld on tube 3. As mentioned before, the fracture surface was characterized by river patterns encountered in cleavage and quasi-cleavage failures ( Ref 2...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003570
EISBN: 978-1-62708-180-1
... Cavitation Erosion Resistance , J. Mater. Eng. Perform. , Vol 6 ( No. 5 ), 1997 , p 633 – 641 10.1007/s11665-997-0057-5 9. Hoff G. , Herbert W. , and Rieger H. , “Rain and Sand Erosion, Phenomena of Material Destruction Caused by Repeated Loads,” STP 474, Characterization...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006756
EISBN: 978-1-62708-295-2
... primary and secondary causes without this understanding. Thorough materials characterization is usually the first step, but is certainly not the only step, in a failure investigation. Example 1: Rupture of a Power Plant Waterwall Tube Material Imperfections and Welding Flaws Example 2: Flange Bolt...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001909
EISBN: 978-1-62708-235-8
.... NAWCWD shipped several of each type of conical fins to ARL for examination. Among other characteristics, attention was focused on the integrity of the plug welds. ARL performed radiography, tensile testing, visual examination, and metallography of the failed test specimens in order to characterize...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001580
EISBN: 978-1-62708-229-7
... Data Analysis Imaging Feature Measurements Radius Analysis Weld Angle Variation This work demonstrates the utility of the laser mapping technology for the characterization of the surface topography. This technique provides non-contact methods for accurately measuring topographic...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003521
EISBN: 978-1-62708-180-1
... at magnifications above 500× Overload zone: may be either ductile or brittle Path of penetration may be irregular, intergranular, or a selective phase attacked. EDS (c) may help identify corrodent. Wear debris and/or abrasive can be characterized as to morphology and composition. Rolling...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001569
EISBN: 978-1-62708-229-7
...Abstract Abstract This paper reviews several fatigue failures from the waterwall, superheater, and economizer portions of the boiler, their causes and how they were mitigated and monitored. Some cases required simple field modifications by cutting or welding, repair of existing controls...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006761
EISBN: 978-1-62708-295-2
... to produce. Examples of these applications include through-thickness property measurements in plates and forgings, weld heat-affected zones, and precious metals where small amounts of material are available. In addition, characterizing the mechanical behavior of anisotropic materials often requires...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003513
EISBN: 978-1-62708-180-1
...Characterizations of elastic-plastic fracture toughness Table 1 Characterizations of elastic-plastic fracture toughness Final event Location on toughness-temperature curve Significant stable crack extension J -integral toughness, J mat CTOD toughness, δ mat Unstable fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048846
EISBN: 978-1-62708-234-1
.... Smaller boat samples and pyramid samples were removed from other welds. Each was characterized, at a minimum, by chemical analyses and microstructural examinations. Stress-rupture tests and tensile tests were performed on some samples to determine the strength properties of the materials of construction...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001669
EISBN: 978-1-62708-229-7
...% of the favorably oriented grain boundaries; less advanced cavitation was observed throughout the weld metal in this area. As shown in Figure 6 , the advanced cavitation was characterized by series of linked cavities, with only small ligaments of intact material remaining in the grain boundary. In the other areas...