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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001429
EISBN: 978-1-62708-227-3
... with a highly stressed part in which defects of the type in question are revealed during machining is to scrap the forging. Even if full stress relieving after welding in practicable, there remain differences in the composition and structure of the weld- and parent-metals and the likelihood of discontinuities...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001335
EISBN: 978-1-62708-215-0
... was thought to be contamination occurring in the casting process that became concentrated in the recycled skimmings. It was recommended that future material specifications for skimmings and for externally obtained scrap copper include a trace analysis for tellurium. Cupronickel Embrittlement...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001106
EISBN: 978-1-62708-214-3
... were made by bending sheet and welding the seams. Furnace temperatures range from 900 to 700 °C (1650 to 1290 °F), with the metal being cast at 710 °C (1310 °F). Some scrap remelting and fluxing operations are also carried out. The heaters are linked to thermocouples placed in the molten...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006838
EISBN: 978-1-62708-329-4
...: Ref 26 Fig. 4 Lack of fusion in 17-4 PH stainless steel processed by metal additive manufacturing The ramifications of these potential sources of failure are obvious, by increasing production cost or resulting in service failures. Currently, reported scrap rates for metal-AM...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001906
EISBN: 978-1-62708-217-4
... of Manufacturing Defects on Performance A lap is caused by the folding over of metal into the surface of a component during forming, 1 while a seam is a discontinuity in a part caused by an incomplete joining of material during forming. 2 The proof testing demonstrated that the lugs were very sensitive...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006831
EISBN: 978-1-62708-329-4
... not reoxidize. Consideration of how the metal flow systems are designed requires decisions as to how many castings can be included in the mold versus how much room is required for the metal-delivery system. These decisions are based on the economics related to the scrap rate resulting from the metal-delivery...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001575
EISBN: 978-1-62708-217-4
..., however, because the bushing had only a few microns of clearance. The effect caused the oil to squeeze out, resulting in metal-to-metal contact, and ultimately failure. Aircraft components Gear boxes Oil pumps Overheating Thermal stresses 32CrMoV 13 (Other, miscellaneous, or unspecified...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001822
EISBN: 978-1-62708-180-1
... Railroad favored the scrapping of overheated axles when the babbitt metal was melted out. Experience indicated that about 90% of the overheated axles contained cracks that could not be turned out within the minimum diameter tolerance permitted. The expense of turning down all overheated axles when only 10...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001532
EISBN: 978-1-62708-232-7
..., respectively. The unetched roll specimens were also observed for non-metallic inclusions (NMI) at 500× magnification. Microstructural examinations were also carried out on natal-etched specimens (2 mL concentrated HNO 3 in 98 mL ethyl alcohol) of failed rolls to observe characteristics of matrix phases...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001367
EISBN: 978-1-62708-215-0
... and difficult to detect. The second-stage impeller reaches a maximum temperature of 70 °C (160 °F) and turns at over 5000 rev/min. An operational upset was reported to have allowed a 10% sodium hydroxide (caustic) solution to enter the compressor impellers. The third-stage impeller had been scrapped. Effects...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001838
EISBN: 978-1-62708-241-9
... examination and penetrant testing. The affected pipe sections were scrapped. As a result of this condition, an alternative vendor was selected. Hypotheses about Potential Metallurgical Root Causes At the beginning of the failure investigation, six hypotheses were considered as candidate metallurgical...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006800
EISBN: 978-1-62708-329-4
... whether the part will be made from metal, plastic, ceramic, or composite. Level II: Determine whether metal parts will be produced by a deformation process (wrought) or a casting process; for plastics, determine whether they will be thermoplastic or thermosetting polymers. Level III: Narrow...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003501
EISBN: 978-1-62708-180-1
... will be made from metal, plastic, ceramic, or composite. Level II: Determine whether metal parts will be produced by a deformation process (wrought) or a casting process; for plastics, determine whether they will be thermoplastic or thermosetting polymers. Level III: Narrow options to a broad...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006766
EISBN: 978-1-62708-295-2
...Abstract Abstract Identification of alloys using quantitative chemical analysis is an essential step during a metallurgical failure analysis process. There are several methods available for quantitative analysis of metal alloys, and the analyst should carefully approach selection of the method...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001720
EISBN: 978-1-62708-227-3
... available. These samples will be important to confirm findings to this time and determine the remaining thickness of the hull plate and, indirectly, the integrity of the fuel oil tanks. Fuel tanks Hulls (structures) Metallography Plate metal Warships Carbon steel plate Mixed-mode fracture...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
... Control, materials selection, and use problems: for example, underfill, part distortion, and poor dimensional control; tool overload and breakage; excessive tool wear; high initial investment due to equipment cost; poor material use and high scrap loss The movement of metal during these processes...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003552
EISBN: 978-1-62708-180-1
.... The article focuses on the types of hydrogen embrittlement that occur in all the major commercial metal and alloy systems, including stainless steels, nickel-base alloys, aluminum and aluminum alloys, titanium and titanium alloys, copper and copper alloys, and transition and refractory metals. The specific...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006784
EISBN: 978-1-62708-295-2
...Abstract Abstract Hydrogen damage is a term used to designate a number of processes in metals by which the load-carrying capacity of the metal is reduced due to the presence of hydrogen. This article introduces the general forms of hydrogen damage and provides an overview of the different types...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001111
EISBN: 978-1-62708-214-3
... varestraint welding, rather than cold cracks, was obtained by scanning electron rnicroscopy (SEM) examination of the crack surfaces. This examination revealed that the crack surfaces were interdendritic, a condition that could have occurred only during the last stage of resolidification of the fused metal...