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homogeneous nucleation

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Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001269
EISBN: 978-1-62708-215-0
... resulting from lower matrix hardness and high sulfur content of the material, which contributed to lower ductility through increased nucleation sites. It was recommended that the hob manufacturer specify a minimum amount of required reduction for the original bar of tool steel material, to provide...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001337
EISBN: 978-1-62708-215-0
... regions examined. It was concluded that preferential nucleations of graphite nodules in a series of bands weakened the steel locally, producing preferred fracture paths. Formation of these graphite bands probably expedited the creep failure of the tube. Future failures may be avoided by using low-alloy...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003565
EISBN: 978-1-62708-180-1
... fracturing on the surface and crushing of debris; stage 2, extrusion of pulverized debris in interstices and compaction of a fine grained film; stage 3, nucleation of cracks along the weak film/substrate interface; and stage 4, lateral propagation of interfacial cracks and delamination of the compacted film...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001108
EISBN: 978-1-62708-214-3
... by a diffusional process, resulting in lenticular ( r type) voids at the grain boundary. The plastic deformation introduced by cold bending certainly enhanced void formation by creating more nucleation sites at the in-service recrystallized grain boundaries. Moreover, the differential stress condition...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001616
EISBN: 978-1-62708-229-7
... at local non-homogeneities (chemistry or grain size). The high nonmetallic inclusion content in the steel resulted in local bursting. The nonmetallic inclusions acted as nucleating sites for accelerated corrosion. The penetration of the corrosive elements through the grain boundaries and local inclusions...
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
.... Trans. A , Vol 27 ( No. 10 ), Oct 1996 , p 3081 – 3088 10.1007/BF02663857 11. Liang F.-L. and Laird C. , Control of Intergranular Fatigue Cracking by Slip Homogeneity in Copper, Part I: Effect of Grain Size , Mater. Sci. Eng. A , Vol 117 ( No. 1–2 ), Sept 1989 , p 95...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006793
EISBN: 978-1-62708-295-2
.... and Wayne S.F. , Wear of Two Titanium Alloys under Repetitive Compound Impact , Wear , Vol 61 , 1980 , p 69 – 76 10.1016/0043-1648(80)90112-X 10. Rice S.L. and Solecki R. , “ Wear of Homogeneous and Composite Materials under Conditions of Repeated Normal and Sliding Impact...
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
... , Metall. Mater. Trans. A , Vol 27 ( No. 10 ), Oct 1996 , p 3081 – 3088 10.1007/BF02663857 15. Liang F.-L. and Laird C. , Control of Intergranular Fatigue Cracking by Slip Homogeneity in Copper, Part I: Effect of Grain Size , Mater. Sci. Eng. A , Vol 117 ( No. 1–2 ), Sept...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
...Abstract Abstract This article focuses on characterizing the fracture-surface appearance at the microscale and contains some discussion on both crack nucleation and propagation mechanisms that cause the fracture appearance. It begins with a discussion on microscale models and mechanisms...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... concepts. bending brittle fracture compression failure deformation ductile crack nucleation ductile fracture ductility fractography manufacturing imperfections metals microvoid coalescence notched specimen plastic flow root cause failure analysis single-crystal cleavage models specimen...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001787
EISBN: 978-1-62708-241-9
... ) 10.1016/j.engfracmech.2007.02.018 7. Zhang M. , Yang P.S. , Tan Y.X. , Micromechanisms of fatigue crack nucleation and short crack growth in a low carbon steel under low cycle impact fatigue loading . Int. J. Fatigue 21 , 823 – 830 ( 1999 ) 10.1016/S0142-1123(99)00031-6 8...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
... homogeneous product include: The fast shrinkage as the molten metals cools (roughly 5% in volume for steel) The gaseous products that are trapped by the solidifying metal as they try to escape from the liquid and semisolid metal Small crevices in the mold walls, which cause the metal to tear...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001807
EISBN: 978-1-62708-241-9
.... In the previously published articles, rolling contact fatigue is classified into two types: subsurface initiated (spalling and case crushing), and surface initiated (pitting and micropitting). According to the references [ 1 , 2 ], the surface-initiated cracks will nucleate preferentially due to stress...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006835
EISBN: 978-1-62708-329-4
... and casting practice are the development of centerline segregation and porosity and a condition known as scabs on the surface. Porosity is developed in cast ingots when they solidify and is of two types: pipe and blowholes. Factors that work against obtaining a perfect homogeneous cast ingot include...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001660
EISBN: 978-1-62708-236-5
... are discussed along with potential methods to eliminate these microstructural in homogeneities. Shear bands Threaded fasteners Ti-6Al-4V UNS R56406 Ductile fracture Threaded Ti-6Al-4V fasteners are used extensively by the aerospace industry for joining structural components. One popular type...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001595
EISBN: 978-1-62708-235-8
.... Larger grained materials shift the nose of the Time-Temperature-Transformation (TTT) curve to the right, inhibiting pearlite nucleation and promoting martensite formation. Much of the hardenability research has been performed on a moderately fine grain size, Size 7 per ASTM E112, with correction factors...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003541
EISBN: 978-1-62708-180-1
... initiation stage of fracture is sometimes referred to as nucleation, which is followed by slow, subcritical crack growth. As the newly formed crack increases in size, a critical size is eventually reached at the point when cracking becomes unstable overload fracture at a very rapid rate. The boundary...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003545
EISBN: 978-1-62708-180-1
... precipitate is formed during creep, a simple heat treatment or cold work followed by annealing prior to testing should give a homogeneous distribution of precipitates. Microstructural changes due to the combined influence of temperature and stress can be difficult to evaluate. Therefore, simulation...
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
... followed by annealing prior to testing should yield a homogeneous distribution of precipitates. Microstructural changes due to the combined influence of temperature and stress can be difficult to evaluate. Therefore, simulation of creep exposure prior to actual use is sometimes necessary, where tested...
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
... is well preserved and if the analyst is knowledgeable, the fracture appearance reveals details of the loading events that culminated in fracture. An understanding of how cracks nucleate and grow microscopically to cause bulk (macroscale) fracture is an essential part of fractography. The ability...