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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001250
EISBN: 978-1-62708-223-5
...Abstract Abstract A broken cross-recessed die was examined. Examination of the unetched, polished section for impurities revealed several coarse streaks of slag. The purity did not therefore correspond to the requirements set for a high speed tool steel of the given theoretical quality DMo 5...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.pulp.c0045911
EISBN: 978-1-62708-230-3
... large amounts of sodium, calcium, potassium, aluminum, and sulfur, alkali, alkali earth, and other contaminants that completely permeated even the thin oxides on the fracture surfaces. Additional investigation of the purity of the steam itself as reported by the power plant showed that corrosion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0046252
EISBN: 978-1-62708-229-7
...Abstract Abstract A type 321 stainless steel bellows expansion joint on a 17-cm (6 in.) OD inlet line (347 stainless) in a gas-turbine test facility cracked during operation. The line carried high-purity nitrogen gas at 1034 kPa (150 psi) with a flow rate of 5.4 to 8.2 kg/s (12 to 18 lb/s...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091640
EISBN: 978-1-62708-229-7
...Abstract Abstract A valve stem made of 17-4 PH (AISI type 630) stainless steel, which was used for operating a gate valve in a steam power plant, failed after approximately four months of service, during which it had been exposed to high-purity water at approximately 175 deg C (350 deg F...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0047645
EISBN: 978-1-62708-229-7
... accessories of the welding torch were overhauled to ensure that leak-in or entrainment of air was eliminated. Also, the purity of the shielding-gas supplies was rechecked to make certain that these had not become contaminated. Contaminants Gas turbine engines Shielded arc welding Thermal stresses Ti...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048620
EISBN: 978-1-62708-225-9
... in magnesium content or excessive impurities, such as lead, tin, or cadmium. This composition problem with zinc alloys was recognized many years ago, and particular attention has been directed toward ensuring that high-purity zinc is used. This corrective measure reportedly resulted in virtual elimination...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001158
EISBN: 978-1-62708-225-9
... of major defects and was of high purity, although a number of minor surface defects such as rolling laps were found. The spring was heat treated and its surface strengthened by shot-peening, but the surface was also decarburized to a depth of approximately 0.03 mm which resulted in a lowering...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091655
EISBN: 978-1-62708-229-7
... at one point on the crevice surface. Other deposits on the crevice surface and the crack surface near the crevice were rich in iron. Discussion The literature indicated that Inconel 600 is susceptible to intergranular stress corrosion in hot, high-purity water, but it is only likely at stresses...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091528
EISBN: 978-1-62708-229-7
...-fourth of the wall thickness through a solution-annealed structure, showing evidence of some cold work at the inner surface. The water in this heat exchanger was of sufficient purity that corrosion had not been anticipated. The water conditions were: Temperature: 285 °C (545 °F) Pressure: 7...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001227
EISBN: 978-1-62708-235-8
... (arrow). 1× Fig. 2 Longitudinal crack. 4× A section at the existing parting line was taken for metallographic examination. Macro-etching and Baumann print showed that the material for the pipe was of uniform purity ( Fig. 3 ). But after etching with Nital, zones of 10 to 15 mm width...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001192
EISBN: 978-1-62708-234-1
.... The purity of the material may be characterized by group M 3 of the Steel-iron-Testsheet 1570. The core structure ( Fig. 3 ) is almost free of ferrite, meaning that the crank is well heat-treated. Fig. 3 Core structure of the crank. Longitudinal section, Etch: Picral. 500× The chemical...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001133
EISBN: 978-1-62708-214-3
... It was recommended that the prosthetic manufacturer investigate all thermal cycles to which the part was exposed. Specifically, this evaluation should include a review of vacuum levels during solution annealing, part cleanliness, inert gas purity, and the presence of cooling water or air leaks during hot isostatic...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003551
EISBN: 978-1-62708-180-1
... as compared to traditional ceramics). For the present purpose, technical ceramics are defined as fine-grain (as opposed to coarse) ceramics made of high-purity powders, oxides, and/or non oxides (same as for refractories), with very little batch-to-batch variability and as little as possible liquid-solid...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048814
EISBN: 978-1-62708-229-7
... factors were found to influence the purity level of the coolant water in the steam generators. Brackish river water had corroded copper alloys in the condenser tubes, and some leakage into the system was indicated. Both cuprous oxide (Cu 2 O) and α-hematite were found in the sludge, indicating that oxygen...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001152
EISBN: 978-1-62708-234-1
... by fatigue cracking, which started at the flanges ( Fig. 2 ). The beam was made out of a steel, which corresponded in composition and strength the steel U St 37-2 after DIN 17 000. This was fault-free and of usual purity. For examination of the welded joint a longitudinal section was made from the fracture...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001125
EISBN: 978-1-62708-214-3
... transmission conductor cables are mostly of ACSR construction. Because electrical conductor (high-purity) aluminum cannot bear its own weight over long spans, one or more layers of aluminum wire strands are assembled around a steel wire cable core. The aluminum bears the electrical load, and the steel...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001077
EISBN: 978-1-62708-214-3
... and vacuum arc remelting, was instituted. This step will provide improved materials in terms of purity and homogeneous structure. Selected References Selected References • Alban L.E. , Failures of Gears , Failure Analysis and Prevention , Vol 11 , ASM Handbook , ASM International , 1986...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001633
EISBN: 978-1-62708-221-1
... microstructure. An energy-dispersive spectroscopy (EDS) system attached to the SEM provided elemental analysis for elements sodium and higher on the periodic table. Carbon analysis was performed using an element analyzer connected to an isotope ratio mass spectrometer. Ultrahigh-purity helium was used...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001536
EISBN: 978-1-62708-229-7
... were removed for chemical analysis. The region beneath one of the welds was dry; consequently, high-purity water was injected through the drilled hole, allowed to remain in place for 4 days, and then removed for analysis. The heavily contaminated components were then decontaminated with a dilute aqua...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001391
EISBN: 978-1-62708-215-0
... entire termination failure. The attachment never broke within the solder joints. Rather, the termination consistently came apart from the substrate. Pertinent Specifications A chip detail drawing ( Fig. 1 ) indicated that the chip substrate was high-purity alumina. The resistive element...