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deformation mechanism maps

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By Sammy Tin
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005404
EISBN: 978-1-62708-196-2
... breakdown, diffusional creep, twinning during creep deformation, and deformation mechanism maps. It discusses the creep-strengthening mechanisms for most structural engineering components. The article provides a description of the microstructural modeling of creep in engineering alloys. creep...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009003
EISBN: 978-1-62708-185-6
... situations encountered in multiaxial stress states. The construction of a processing map based on deformation mechanisms is also discussed. ductile fracture multiaxial stress stress-strain curve workability WORKABILITY refers to the relative ease with which a metal can be shaped through plastic...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003993
EISBN: 978-1-62708-185-6
... superalloys, namely, iron-nickel superalloys, nickel-base alloys, cobalt-base alloys, and powder alloys. The article discusses the microstructural mechanisms during hot deformation and presents processing maps for various superalloys. It concludes with a discussion on heat treatment of wrought heat-resistant...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003287
EISBN: 978-1-62708-176-4
... present compelling evidence that dislocations interact strongly with particles on a very local scale. Deformation Mechanism Maps The mechanisms of dislocation glide, dislocation climb, and diffusional flow exhibit different stress and temperature dependencies. Thus, the relative contribution...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003288
EISBN: 978-1-62708-176-4
... from data in order to calculate absolute values of creep rates (see “Deformation-Mechanism Maps” in this article for a discussion on how the power-law regime may vary for a material). Creep deformation results also indicate that the values for n and Q in Eq 2 are both variable with respect...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001348
EISBN: 978-1-62708-173-3
... considering the compression needed to bond dissimilar materials, the deformation-mechanism map work of Frost and Ashby ( Ref 65 ) is helpful. The maps are in a stress/temperature space in which a single deformation mechanism is dominant. The stress used is a normalized tensile stress (tensile stress/shear...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003225
EISBN: 978-1-62708-199-3
...Abstract Abstract Analysis of the failure of a metal structure or part usually requires identification of the type of failure. Failure can occur by one or more of several mechanisms, including surface damage (such as corrosion or wear), elastic or plastic distortion, and fracture. This leads...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006140
EISBN: 978-1-62708-175-7
.... Frost H.J. and Ashby M.F. , Deformation Mechanism Maps , Pergamon Press , UK , 1982 27. Ashby M.F. , A first report of sintering diagrams , Acta Metall. , Vol 22 , 1974 , p 275 – 284 28. Arzt E. , Ashby M.F. , and Easterling Practical K.E...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006807
EISBN: 978-1-62708-329-4
... Society of Mechanical Engineers , 2019 5. Frost H.J. and Ashby M.F. , Deformation-Mechanism Maps: The Plasticity and Creep of Metals and Ceramics , Pergamon Press , 1982 6. Mechanical Testing and Evaluation , Vol 8 , ASM Handbook , ASM International , 2000 10.31399...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005509
EISBN: 978-1-62708-197-9
... International Conference on Hot Isostatic Pressing , 2008 4. Frost H.J. and Ashby M.F. , Deformation Mechanism Maps , Pergamon Press , United Kingdom , 1982 5. Laptev A. , Samarov V. , and Podlesny S. , Parameters of Hot Isostatic Pressing of Porous Materials...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004020
EISBN: 978-1-62708-185-6
... mechanisms during restoration via dynamic recovery at hot-working strain rates. However, it is a reasonable assumption that the basic softening events, characterizing constant-rate testing at low and intermediate temperatures and also creep, are relevant even under the conditions of hot deformation...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005183
EISBN: 978-1-62708-186-3
... properties, followed by models of constitutive behavior. These models include the isothermal constitutive model and the physical model for superplastic flow. A formal description of the superposition of the operative mechanisms for dynamic recovery at hot-working strain rates is also provided. The article...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006824
EISBN: 978-1-62708-329-4
...-base superalloys are typically used for components in these high-temperature regions of the gas turbine. There are multiple mechanisms by which creep manifests in a material. For each alloy, the creep mechanism can be predicted by using a deformation mechanism map ( Fig. 2 ). Fig. 2...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005506
EISBN: 978-1-62708-197-9
.... Akad. Nauk. SSR, Otd Tekh., Nauk , No. 8 , 1958 , p 26 – 31 32. Rabotnov Y.N. , Creep Problems in Structural Members , North Holland , Amsterdam , 1969 33. Ashby M.F. , A First Report on Deformation-Mechanism Maps , Acta Metall. , Vol 20 , 1972 , p 887 – 897 34...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002352
EISBN: 978-1-62708-193-1
... ) and Ghandi and Ashby ( Ref 6 ) constructed a series of deformation mechanism maps for crystalline materials. Several of these maps are shown in Fig. 3 ( Ref 7 ). They classified brittle fractures into three distinct types: modes I, II, and III. (These are different from the three modes of crack growth...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006789
EISBN: 978-1-62708-295-2
... by p / H ) is typically larger than 0.1; from Fig. 6(a) it is predicted that wear is largely dominated by plastic deformation. The mapping approach is quite useful for understanding the wear mechanisms and transitions for steels commonly used for wheels and rails. Figure 11 shows the wear map...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002477
EISBN: 978-1-62708-194-8
..., there are two competing failure modes: ductile and brittle ( Fig. 6 ). With increasingly constrained stress states (uniaxial → biaxial → triaxial), the tendency for brittle failure tends to increase. Brittle failure occurs when the brittle failure mechanism occurs prior to ductile deformation ( Fig. 6...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002472
EISBN: 978-1-62708-194-8
... ). These various processes of creep (dislocation controlled as well as diffusion controlled) may be represented on a deformation mechanism map to highlight regimes of stress and temperature where each mechanism, based on current theories, may be operating ( Ref 17 ). However, such maps are only as good...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004017
EISBN: 978-1-62708-185-6
... are constructed chiefly by using the best mechanistic models of each fracture process. For more on high-temperature fracture mechanisms, see Ref 15 . Fig. 10 Fracture mechanism map for nickel Failure in deformation processing at below 0.5 T m occurs by ductile fracture. The three stages...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004013
EISBN: 978-1-62708-185-6
... to represent the actual deformation conditions for the process variables employed. Results of these calculations are expressed in the form of processing maps such as that shown in Fig. 10 . In this example, the ordinate is the interfacial friction factor, representing the ratio of the friction stress...