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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047080
EISBN: 978-1-62708-235-8
... as possible after being quenched from the solution temperature. The tubes should be stored in dry ice after the quench until bending can be done. The tubes should be aged immediately after being formed. Flattening and slow-bend tests should be specified to ensure that the connector tubes had satisfactory...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001455
EISBN: 978-1-62708-234-1
... of aluminum or Al-1Zn alloy, was effective in halting and preventing this form of attack. While alarming, the appearance of exfoliation corrosion provides a valuable warning to the engineer or inspector before a severe weakening of the particular sections has occurred. Aging (artificial) Bars...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001674
EISBN: 978-1-62708-234-1
...Abstract Abstract Accelerated aging tests on detonator assemblies, to verify the compatibility of gold bridgewire and Pd-In-Sn solder with the intended explosives, revealed an unusual form of corrosion. The tests, conducted at 74 deg C (165 deg F) and 54 deg C (130 deg F), indicated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001411
EISBN: 978-1-62708-234-1
...Abstract Abstract A welded joint between lengths of 4 in. OD x 13 SWG copper pipe which formed part of a cold-water main failed by cracking over one-third of the circumference. Microscopic examination of the filler metal showed that it had a structure corresponding to a brass of the 60:40 type...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001452
EISBN: 978-1-62708-232-7
... where embrittlement had developed following plastic straining and service at a temperature of 260 deg C (500 deg F) suggested that failure resulted from strain-age embrittlement. Brackets Ovens Rimming steel Brittle fracture A bracket which formed part of the carrier of a chain conveyor...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001670
EISBN: 978-1-62708-217-4
... the threading operation, the outer wall surface is centerless ground, except for approximately one inch from the open end. The motor case, now in its finished form, is aged at 900 F for three hours in a steam environment and slow cooled. The case is removed from such environment at a temperature...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001590
EISBN: 978-1-62708-228-0
... from Cr-containing carbide precipitation; and, finally, establishes a grain matrix more likely to form a coarser (less damaging) age hardening precipitate. For Alloy 601, such a temperature is believed to be 900 to 1000 °C (1650 to 1830 °F) for between one and three hours. After the phenomena...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
..., and creep. These three modes of fracture are briefly summarized in Table 1 , which includes concise summaries of contributing factors and the visual and microscopic aspects of each. In general, the growth or propagation of cracks during an overload fracture is more rapid than for the more progressive forms...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001096
EISBN: 978-1-62708-214-3
... lines are iron carbides or nitrides that have formed on dislocations. The age of the steel means that it was probably made by the Bessemer process and that nitrogen from the air blown through the molten iron was dissolved in the steel used to make the stud. The nitrogen formed a nitride of iron...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003543
EISBN: 978-1-62708-180-1
... 1 , which includes concise summaries of contributing factors and the visual and microscopic aspects of each. In general, the growth or propagation of cracks during an overload fracture is more rapid than for the more progressive forms of cracking due to fatigue or creep. Hence, overload is described...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001813
EISBN: 978-1-62708-241-9
...–chromium–molybdenum steels in which the carbides formed have a composition M x C y . Over-aging promotes the coalescence of the small carbides formed from the pearlite decomposition and prolonged aging leads to a structure of ferrite with an almost uniform distribution of spheroidized carbides...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001723
EISBN: 978-1-62708-221-1
.... The above series of tests was carried out five days after shearing and, in order to check if natural ageing was a further factor in promoting brittleness, additional specimens were work-hardened on one sawn edge by hammer blows and others impressed with a notch formed by forcing into the specimen a 1...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001593
EISBN: 978-1-62708-234-1
... indicating low cycle fatigue associated with cyclic temperature changes from normal service. The design of the part and the material selection were significant contributing factors because of stresses induced during molding, physical aging of the amorphous polysulfone resin, and the substantial differential...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001263
EISBN: 978-1-62708-224-2
... Fracture and subsidiary cracks in the longitudinal section. 200 × Fig. 3 Cleavage of a pearlite grain. 1250 × It is well known that pronounced slip planes and cleavage cracks often form in ferritic steels which have become brittle due to ageing. On the other hand, this type of fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001474
EISBN: 978-1-62708-224-2
... that a fissure was formed during the manufacture of the hook and had not developed in service. The failure was associated with a surface defect, and it was recommended that the other similar hooks at the establishment be crack detected and any similar discontinuities eliminated. Cranes Hooks Surface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0048840
EISBN: 978-1-62708-220-4
...-stress levels after welding. Lamellar tearing Pressure vessels Strain aging Welded joints ASTM A201 Grade B Joining-related failures Brittle fracture A spherical carbon steel fixed-catalyst bed reactor failed after 20 years of service while in a standby condition ( Fig. 1 ). At the time...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001547
EISBN: 978-1-62708-225-9
... of the two alloys in the form of age-hardened wire (hardness = R c 47 to 49) with diameters of 0.18 in. (5 mm) were not obvious. Corrosion properties were similar: Neither material was corroded by short-term exposure (up to 20 days) to 3.5% salt (NaCl) water. Both materials were mildly corroded...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003504
EISBN: 978-1-62708-180-1
...Abstract Abstract Reliability-centered maintenance (RCM) is a systematic methodology for preventing failures. This article discusses the history of RCM and describes the key characteristics of an RCM process, which involves asking seven questions. The first four questions comprise a form...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0047199
EISBN: 978-1-62708-234-1
... MPa ksi MPa ksi Material 1 (a) As-received (T6) 547 79.4 609 88.3 32.9 Severe Re-solution treat, age to T6 561 81.3 614 89.1 34.0 Medium Convert as-received T6 to T7 x1 543 78.7 587 85.2 36.0 Severe Re-solution treat, age to T6, convert to T7 x 1 541 78.4...
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
... of a known, good blade material standard showing the (1) eutectic gamma prime, (2) metal carbide particle, (3) coarse gamma prime, and (4) fine aging gamma prime Carbide Precipitation and Overaging In addition to the gamma-prime phase, all turbine blade alloys form carbide precipitates of two...