1-20 of 123 Search Results for

rapid quenching

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048294
EISBN: 978-1-62708-234-1
... as a completely martensitic structure was revealed at the edges of the ruptures in these tubes because of rapid quenching by escaping fluid. The prolonged-overheating failures were concluded to have been the primary ruptures and that local loss of circulation had caused rapid overheating in adjacent tubes. Poor...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001444
EISBN: 978-1-62708-231-0
...-cutting, a narrow band of material on each side of the cut was raised above the hardening temperature. When the torch had passed the rate of abstraction of heat from this zone by conduction into the cold mass of the rail was sufficiently rapid to amount to a quench and thus cause local hardening...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0047579
EISBN: 978-1-62708-234-1
... Abstract Several fractures occurred in flange studs used for remote handling of radioactive equipment. The studs, of quenched-and-tempered type 414 stainless steel, fractured in the HAZs produced in the studs during the circumferential welding that joined the studs to the flanges. The weld...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001686
EISBN: 978-1-62708-220-4
... for coils at the non-fired end of the vaporizer during low flow transients. Dryout results in rapid increase in the tube wall temperature. Thermal cycling of the coil is completed by liquid quenching resulting from resumption of normal flow rates and the return to annular flow. The probable root cause...
Image
Published: 30 August 2021
Fig. 12 Typical microstructures of carbon steel boiler tube that ruptured as a result of rapid overheating. (a) Elongated grains near rupture resulting from rapid overheating below the recrystallization temperature. (b) Mixed structure near rupture resulting from rapid overheating between Ac 1 More
Image
Published: 01 January 2002
Fig. 10 Typical microstructures of 0.18% C steel boiler tubes that ruptured as a result of rapid overheating. (a) Elongated grains near tensile rupture resulting from rapid overheating below the recrystallization temperature. (b) Mixed structure near rupture resulting from rapid overheating More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001503
EISBN: 978-1-62708-234-1
... quench. Background Information The hypoid pinion was the driving member of a power unit operating a rapid transit car. The pinion had been removed from service at the end of the initial test period because it showed undue wear. (Keep in mind that transit gearing runs under full load in both...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001213
EISBN: 978-1-62708-220-4
... of alloys whose stability depends upon the formation of a passive layer. The carbides can be redissolved at a temperature of 1050°C and maintained in solution by a rapid quench; this will cause the steel to lose its tendency for intergranular corrosion ( Fig. 12 ). Fig. 5 Longitudinal sections...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001776
EISBN: 978-1-62708-241-9
... and tempering. This leads to an increase in hardness by about 3–5 HRC [ 15 ]. In ASTM A128 grade B-4, the usual transformation of austenite to other phases is suppressed by a combination of high manganese content and rapid quenching in water from above 982 °C. Hence, the structure of crusher jaws produced from...
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
... to achieve temperature equalization in a heavy section, whereas small parts may come to even temperature in just minutes. For quenched and tempered steels, the austenitizing temperature is a compromise between achieving rapid solution and diffusion of carbon and minimizing grain growth. The optimal...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001294
EISBN: 978-1-62708-215-0
...: Solution heat treat: 1038°C (1900°F) for 15 min., quick furnace quench Trigger anneal: 927 to 943°C (1700 to 1730°F) for 20 to 35 min., argon quench Sub-zero cool: −73°C (−100°F) for ≥ 1 h Temper: 449 to 460°C (840 to 860°F) for 3 h, rapid quench This heat treatment was designed to provide...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048289
EISBN: 978-1-62708-234-1
... was disclosed by the wall thickness and OD of the tubing. The tubes were concluded to have failed due to rapid overheating. Boiler tubes Overheating Swelling ASME SA192 Creep fracture/stress rupture (Other, miscellaneous, or unspecified) failure After 7 months of service, two low-carbon steel...
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 Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003510
EISBN: 978-1-62708-180-1
..., but the degree of embrittlement is enhanced by nickel, manganese, and chromium content. Tempering should be carried out below this range for steels susceptible to this embrittlement or above the range, followed by rapid quenching through the range. Molybdenum additions minimize the susceptibility of steels...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.petrol.c9001167
EISBN: 978-1-62708-228-0
... of the coupling, probably subsequently assisted by stress corrosion. After reaching a crack depth of 5.5 mm, rapid unstable brittle fracture occurred resulting in catastrophic failure in the marine riser. The main recommendation was to specify a quench and temper, rather than a normalising treatment...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001114
EISBN: 978-1-62708-214-3
..., and the microstructure of the HAZ was martensitic. Martensite is a hard, brittle phase resulting from rapid cooling after welding. The hardness of the HAZ was very high (589 to 618 HV, using a 500 g load) compared with that of the base metal of both the clamp and handling padeye. The hardness distribution is shown...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001308
EISBN: 978-1-62708-215-0
... of a stress raiser, steel composition and grain size, quenching medium, and the time interval between quench and temper. For the turntable rail, the use of water as a quenching medium was believed to be the primary cause of cracking. Water provides a very rapid cooling rate, which in turn produces high...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001430
EISBN: 978-1-62708-236-5
... hardening and cracking in the heat affected zone. On reflection it will be apparent that the abstraction of heat from the welded zone by the cold mass of the shaft is equivalent to a rapid quench. in welding these materials, therefore, due consideration must be given to pre-heat temperatures, electrode...
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
... curvature, preheated, then solution treated, water quenched, and then aged for 8 to 10 h. Analysis (visual inspection, slow-bend testing, 65x macrographic analysis, macroetching, spectrographic analysis, hardness tests, microhardness tests, tension tests, and microscopic examination) supported...
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
... 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 of cracking due to fatigue...