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holding time

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001149
EISBN: 978-1-62708-232-7
... minutes. Hold periods in tension five of these tests while one was performed using a hold period in compression only. The fatigue tests included only very short hold times compared to the service conditions. It was not practical to run laboratory fatigue tests with hold times comparable to service...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001346
EISBN: 978-1-62708-215-0
... and/or compressive hold period was incorporated into the fatigue test ( Ref 4 , 5 ). Nearly a 50-fold decrease in the fatigue life was observed because of specimen geometry (solid versus tubular) and fatigue loading conditions (hold versus no hold time) ( Ref 3 ). Tensile or compressive hold time during fatigue can...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003546
EISBN: 978-1-62708-180-1
...: Ref 13 Fig. 9 Results of elastic-plastic analysis showing the hoop stress range distribution along several directions on plane A. Source: Ref 13 Fig. 13 Effect of hold time on the fatigue crack growth rate properties of 2.25Cr-1Mo cast steel. The 2 h hold time tests were...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006781
EISBN: 978-1-62708-295-2
... ) as a function of crack size for crack types A, B, and C. Δ K thermal , cyclic stress intensity due to thermal stresses; Δ K p , cyclic stress intensity due to pressure stresses Fig. 17 Effect of hold time on the fatigue crack growth rate properties of 2.25Cr-1Mo cast steel. The 2 h hold time tests...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001789
EISBN: 978-1-62708-241-9
... load step (>100 lb [445 N]), and/or a shorter hold time (<4 h) could raise the measured value at which cracking initiates and result in nonconservative measurements. Fatigue precracked and side-grooved compact tension specimens [ 10 ] of 0.7-in. (1.8 cm) in thickness were machined from...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003517
EISBN: 978-1-62708-180-1
...Abstract Abstract This article focuses on the life assessment methods for elevated-temperature failure mechanisms and metallurgical instabilities that reduce life or cause loss of function or operating time of high-temperature components, namely, gas turbine blade, and power plant piping...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001609
EISBN: 978-1-62708-229-7
... welds were made with type 430 weld filler metal. A PWHT temperature of 730 °C (1350 °F) minimum and a holding time of 1 h/25 mm, 15 min minimum, were required by the code for the ASME P-No. 7, group No. 2 tube-to-header welds. Postweld heat treatment was performed in the shop using a clamshell-type...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006816
EISBN: 978-1-62708-329-4
... Postquenching factors Part handling Delay before tempering Increases tendency toward cracking Amount of time available is dependent on section thickness, amount of retained austenite, and alloy. Washing temperature Affects effectiveness of cleaning and removal of soil Can shock...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001571
EISBN: 978-1-62708-229-7
... precipitated and they do not report results for temperatures above 850°C. However, it is clear that these carbides will be put into solution at some temperature above 850°C. The difference in holding time at the stress relief temperature (23.8h for Midland vs 50h for TMI-2) does introduce another variable...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001828
EISBN: 978-1-62708-241-9
... an austenitizing, quenching, and tempering sequence. However, the hold time at the tempering temperature was not sufficiently long to reduce the hardness to the required level of 37 to 40 HRC. The sluggishness of the tempering reaction was attributed to segregation of elements during solidification following...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001608
EISBN: 978-1-62708-236-5
... to determine some combination of the following: cause of damage timing of damage extent of damage This article explains ways in which a technical investigation provides answers to these questions. When steel emerges from a hot rolling mill, it is not a pretty material. At the high...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001095
EISBN: 978-1-62708-214-3
... engagements from the same support the observations that the motor easing fell virtually intact from the crane. The elliptically worn holes on the adapter plate are indicative of the bolts having been loose for some time before final failure. Remedial Action For critical applications, bolts holding...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091727
EISBN: 978-1-62708-217-4
... was stopped. This acceptance test had been run 38 times on similar pressure vessels without problems. The methanol was a safe-fluid replacement for the storable hypergolic fuels (blend of 50% hydrazine and 50% unsymmetrical dimethyl hydrazine). Investigation (visual inspection and 65X images) showed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0006899
EISBN: 978-1-62708-225-9
...Abstract Abstract Type 410 stainless steel bolts were used to hold together galvanized gray cast iron splice case halves. Before installation, the bolts were treated with molybdenum disulfide (MoS 2 ) antiseize compound. Several failures of splice case bolts were discovered in flooded manholes...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001044
EISBN: 978-1-62708-214-3
... plant construction was stopped, the condenser was left with condensate containing trace amounts of ammonia and hydrazine in the hotwell for 6 weeks to 4 months prior to draining. During this time period, any residual hydrazine in the condensate would have decomposed to ammonia or ammonium compounds...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001591
EISBN: 978-1-62708-227-3
...Abstract Abstract On 14 April 1912, at 11:40 p.m., Greenland Time, the Royal Mail Ship Titanic on its maiden voyage was proceeding westward at 21.5 knots (40 km/h) when the lookouts on the foremast sighted a massive iceberg estimated to have weighed between 150,000 to 300,000 tons at a distance...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0046044
EISBN: 978-1-62708-235-8
... in.) at the girth welds and 3.8 mm (0.150 in.) elsewhere. After being assembled, the motor cases were heat treated as follows: preheat to 480 °C (900 °F), stabilize at 705 °C (1300 °F) for 4 h, austenitize at 900 °C (1650 °F) for 30 min, furnace cool to 845 °C (1550 °F) and hold for 30 min, quench in salt bath...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001678
EISBN: 978-1-62708-218-1
...Abstract Abstract Six galvanized high-tensile steel bolts were used to hold the wheels of a four-wheel drive vehicle. The right hand rear wheel of this vehicle detached causing the vehicle to roll and resulting in considerable damage to the body. The wheel was detached by shearing of four...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001713
EISBN: 978-1-62708-220-4
...Abstract Abstract On 21 April 1995, the contents of a large blender (6 cu m) reacted and caused an explosion that killed and injured a number of workers at a plant in Lodi, NJ. A mixture of sodium hydrosulfite and aluminum powder was being mixed at the time of the accident. This report focuses...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0009222
EISBN: 978-1-62708-180-1
... handling heat treatment machining material selection mechanical design tool failure tool steel grade TOOL AND DIE BREAKDOWNS can rarely be studied with a conventional fracture-mechanics approach or stress-time analysis. Also, the lack of a complete and accurate log of manufacturing and service...