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precipitation model

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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001816
EISBN: 978-1-62708-241-9
... with an electroprobe analyzer OXFORD model 6587 was used to observe characteristics such as decohesions and identify small precipitates. The microstructural analysis of the ferrite grains in the steel in its raw state ( Fig. 6 ), along with the analysis of grain size distribution, shows a 13 ASTM G grain size mean...
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
... damage mechanisms and elucidate mechanism coupling interactions. In addition, life modeling in TMF conditions and a practical application of TMF life prediction are presented. coupling interactions fatigue life prediction thermomechanical fatigue THERMOMECHANICAL FATIGUE (TMF) is the general...
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
... strain range. Systems to which this model would be likely to apply would be those that have a stable precipitate structure (i.e., low mismatch between matrix and precipitate) and that are prone to damage by oxidation of grain boundaries. Examples would be Waspaloy, a disk alloy, and Udimet 500...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001845
EISBN: 978-1-62708-241-9
...Abstract Abstract Two clamps that support overhead power lines in an electrified rail system fractured within six months of being installed. The clamps are made of CuNiSi alloy, a type of precipitation-strengthening nickel-silicon bronze. To identify the root cause of failure, the rail operator...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001588
EISBN: 978-1-62708-221-1
... and strain in the low ductility direction of the transition joint plate, lamellar tearing of plate material occurred at the boxed I-beam fillet weld attachment. Brittle fracture of this joint precipitated global collapse of the truss structure. Bridges (structures) Ore conveyors Structural steel...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001769
EISBN: 978-1-62708-241-9
...Abstract Abstract This study examines the role of calcium-precipitating bacteria (CPB) in heat exchanger tube failures. Several types of bacteria, including Serratia sp. (FJ973548), Enterobacter sp. (FJ973549, FJ973550), and Enterococcus sp. (FJ973551), were found in scale collected from...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006777
EISBN: 978-1-62708-295-2
... cracking steam generator tubes INTERGRANULAR FRACTURE is decohesion that occurs along a grain boundary. Intergranular fracture is often associated with the presence of an embrittlement mechanism or the presence of precipitates and segregates at the grain boundary, which make the grain boundary...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001600
EISBN: 978-1-62708-217-4
... examined had cross-sectional thicknesses significantly larger than the web cross-sectional thicknesses of the IT components. Recommendations included changing the web reference dimension of 0.38 in. to include a tolerance range based upon a fracture mechanics model. Also, the shot peening process should...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001707
EISBN: 978-1-62708-217-4
...Abstract Abstract The failures of two aircraft components, one from a landing gear and the other from an ejector rack mechanism, were investigated. Both were made from PH 13-8 Mo (UNS S13800) precipitation-hardening stainless steel which had been heat treated to the H1000 and H950 tempers...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003540
EISBN: 978-1-62708-180-1
... Dimpled IG fracture refers to the cases when microvoid coalescence occurs in (or perhaps adjacent to) grain boundaries from conditions such as creep cavitation or void nucleation at precipitates in the grain boundaries. The term IG brittle fracture is used when the grain surface does not have...
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
... M-8 8.30 20.0 2.07 F-5 8.13 24.2 0.756 1.22 E-11 7.88 17.67 0.802 1.02 H-5 7.63 24.5 0.811 1.18 F-10 7.14 25.3 0.867 1.38 E-8 4.14 64.9 0.954 0.37 (a) (a) No carbides were present, only inclusions Fig. 8 Variation in carbide precipitation...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006787
EISBN: 978-1-62708-295-2
... or coated alloys at high temperatures is often difficult because of the extreme range of composition of the corrosive gaseous and/or fluid environments. Moreover, corrosion predictions are further complicated, because materials have inhomogeneous processing-derived features such as precipitates...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001109
EISBN: 978-1-62708-214-3
.... Fig. 3 Micrographs of grate bar that suffered hot corrosion. (a) Unetched, showing external oxide scale and internal sulfide particles (light gray area). (b) Etched, showing external oxide scale along with precipitated carbides (dark gray area)and lamellar structure consisting of austenite...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001341
EISBN: 978-1-62708-215-0
... in the superheater. Reduced creep ductility is another possible cause of failure. Others report that precipitates at the grain boundaries can cause the reduction ( Ref 3 ). Carbon content, manufacturing procedures such as cold forming, and the heat treatment influence the formation and location of precipitates...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
... 23. Hickey J.J. and Bulloch J.H. , Int. J. Pressure Vessels Piping , Vol 49 , 1992 , p 339 – 386 10.1016/0308-0161(92)90121-U 24. Metzger M. and Seifert T. , A Mechanism-Based Model of LCF/HCF and TMF/HCF Life Prediction: Multiaxial Formulation, Finite-Element...
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
... °C (900 to 1600 °F) temperature range. Sensitization refers to the precipitation of a continuous grain-boundary network of chromium-rich carbides, rendering adjacent areas depleted of the necessary chromium to resist aqueous corrosion and high-temperature oxidation phenomenon. When elevated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001685
EISBN: 978-1-62708-235-8
...-0.8Ti Hydrogen damage and embrittlement Heat treating-related failures References 1. Ammons A. M. , “Precipitation Hardening in Uranium-Rich Titanium Alloys,” Physical Metallurgy of Uranium Alloys , Burke J. J. , Colling D. A. , Gorum A. E...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001366
EISBN: 978-1-62708-215-0
... Magnesium 2.51 2.1–2.9 Titanium 0.01 0.20 (max) Iron 0.16 0.50 (max) Aluminum bal bal Fig. 1 Finite-element model showing geometry of turbine impeller Fig. 11 Scanning electron micrograph of fracture surface from fatigue specimen excised from impeller, showing typical...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001081
EISBN: 978-1-62708-214-3
... in service-induced cracks. Fig. 8 Typical etched microstructure of compressor disk material. Fig. 9 Crack-tip branching of bolt hole crack. Fig. 10 Precipitate morphologies at crack tip in compress or disk. (a) Away from crack tip. (b) and (c) Near crack tip. Fig. 6...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003537
EISBN: 978-1-62708-180-1
... mechanics (and vice versa). The coupling probably first became obvious when Griffith's model for brittle fracture was applied to the study of cleavage fracture in metallic materials in 1954. It was then realized that cleavage fracture in crystalline materials could not be based simply on a normal stress...