Abstract
Powder metallurgy materials as a rule have porosity after sintering. Different pressure working processes (extrusion, pressing, forging, rolling etc.) are used to decrease porosity. Pressure working leads not only to consolidation of materials, but to changes in structure and substructure of materials, i.e. to variation of grain size and formation of dislocation substructure as well.
Keywords
- Dislocation Structure
- Dislocation Substructure
- Cold Deformation
- Recrystallization Temperature
- Diffusion Creep
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
M.M. Ristich, V.I. Trefilov, Yu.V. Milman, I.V. Gridneva, D. Duzevich. Structure and Mechanical Properties of Powder Metallurgy Materials. Cerbian Academy of Science and Art, Belgrad (1992).
V.I. Trefilov, Yu.V. Milman, I.V. Gridneva, Role of plastic deformation in sintering covalent crystals, Powder Metallurgy and Metal Ceramics, 33, 7-8: 357 (1994).
M.L. Bernstein. Structure of deformed metals. Metallurgy, Moscow (1977) (in Russian).
Yu.V. Milman, Structural aspects of warm and cold plastic deformation of crystalline materials, Metal Science and Heat Treatment of Metals, 6:2 (1985) (in Russian).
V.I. Trefilov, Yu.V. Milman, I.V. Gridneva, Characteristic temperature of deformation of crystalline materials, Crystal Res. & Technol. 19, 3: 413 (1984).
Yu.V. Milman, Characteristic temperature of deformation of materials and cold brittleness of BCC metals and ceramics, in: Mechanics of Creep Brittle Materials-2, A.C.F. Cocks and A.R.S. Ponter, Eds., Elsevier Science, Leicester, UK (1991).
V.I. Trefilov, Yu.V. Milman, R.K. Ivashchenko, Yu.A. Perlovich, A.P. Rachek and N.I. Freze. Structure, Texture and Mechanical Properties of Deformed Molybdenum Alloys. Naukova Dumka, Kiev (1983) (in Russian).
V.I. Trefilov, Yu.V. Milman, S.A. Firstov. Physical Basis of Strength for Refractory Metals. Naukova Dumka, Kiev (1975) (in Russian).
V.I. Trefilov, Yu.V. Milman, Physical basis of thermomechanical treatment of refractory metals, in: 12 th Plansee Seminar, H. Bildstein, H. Ortner Eds., Metallwerk Plansee, Reutte, Austria (1989).
Yu.V. Milman, A.P. Rachek, G.G. Kurdumova, A.V. Abalikchin, N.I. Freze, To the problem of 45° brittleness of the low alloyed molybdenum sheet, Physics of Metals and Physical Metallurgy 48, 2: 309 (1979).
Yu.V. Milman, The influence of directed alloying and thermomechanical treatment on the structure and mechanical properties of high-purity chromium, molybdenum and tungsten, J.De Physique IV 5: 67 (1995).
R.A. Andrievsky, On the temperature dependence of densification in sintering, Sci.Sintering 16, 1: 3 (1984).
F.R. Nabarro, Deformation of crystals by the motion of single ions, in: Reports of a Conference on Strength of Solids, The Physical Soc. of London, Cambridge (1948).
C. Hering, Diffusional viscosity of a polycrystalline solid, J.Appl. Phys. 21, 5: 437 (1950).
I.M. Lifshits, Theory of dynamic-viscose yielding of polycrystalline solids, Zh. Eksp. Teor. Fiz. 44:1349 (1963).
R.L. Coble, A model for boundary diffusion controlled creep in polycrystalline materials, J.Appl. Phys. 34: 1679 (1963).
M.F. Ashby, R.A. Verrall, Diffusion-accommodated flow and superplasticity, Acta Met. 21, 2: 149 (1973).
Ya.E. Geguzin. Physics of Sintering, Nauka, Moscow (1984) (in Russian).
Ya.E. Geguzin, A.S. Dzyuba, V.P. Matsokin, Dislocation structures formed in the contact zone of two single crystals, Ukr. Fiz. Zh. 29, 9: 1419 (1984).
Ya.E. Geguzin, A.K. Emets, V.G. Kononenko, D.V. Pluzhnikova, Dislocation mechanism of high-temperature deformation of elements of the roughness of compressed real surfaces, Poroshk. Metall. 6: 35 (1982).
W. Schatt, Untersudningen an Kupfer-Einkristall Sintermodellen, Kristall und Tecnik. 10, 9: 845 (1975).
W. Schatt, E. Friedrich, Versetzungsbildung während des Sinterns, Planseeberichte för Pulvermetallurgie 25, 3: 145 (1977).
W. Schatt, E. Friedrich, Crystal Research and Technology 17, 9: 149 (1982).
E. Friedrich, W. Schatt, Sintering of one-component model systems: nucleation and movement of dislocation in necks, Powder Met. 23, 4: 193 (1980).
E. Friedrich, W. Schatt, Vergetzungsverrvielfachung als Sinterreaktion, Z. Metallkunde 73, 1: 56 (1982).
M.P. Poire. High-temperature plasticity of crystalline solids, Metallurgiya, Moscow (1982) (in Russian).
F. Garofalo. Laws of creep and long-term strengths of metals, Metallurgiya, Moscow (1968) (in Russian).
I. Weertman, Steady-state creep of crystal, J.Appl. Phys. 28, 10: 1185 (1957).
M.F. Ashby, A first report of deformation-mechanism maps, Acta Met. 20, 7: 887 (1972).
S. Erdmann-Jesnitzer, F. Günther, Gesetzmäßigkeiten bei Verwachsungsvorgängen von Kristallen. II. R ntgenographische Untersuchungen an verklebten Steinsalzkristallen, Z.Metallkunde 46, 12: 801 (1955).
Yu.I. Boiko, R.B. Lakhterman, Stresses formed in diffusion sintering sets of real powder particles, Poroshk. Metall. 8: 31 (1976).
W. Schatt, E. Friedrich, Dislocation-activated sintering processes, in: Sintering-85, Plenum Press, N.Y.-L. (1987).
I.P. Arsentyeva, M.M. Ristić, Dislocation structure of nickel powder and its role in the sintering process, in: Sintering-85, Plenum Press, N.Y.-L. (1987).
Yu.V. Milman, N.P. Zakharova, R.K. Ivashchenko and N.I. Freze, Structure and mechanical properties of K-dopped W wire, in: Proc 14 Plansee Seminar, G. Kneringer, P.Röhammer and P. Wilhartitz, Eds., Metallwerk Plansee, Reutte, 1: 128 (1997).
Yu.V. Milman and K.P. Riaboshapka, About «crystallization of dispersion hardened alloys with BCC lattice, Physics of Metals and Metallography (in Russian), 32, 5: 998 (1971).
Yu.V. Milman, I.V. Gridneva, I.V. Goncharova and V.A. Goncharuk, Effect of crack-tip stress relaxation under load on silicon strength characteristics, Sci. Sintering 30(1): 29 (1998).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1999 Springer Science+Business Media New York
About this chapter
Cite this chapter
Milman, Y.V. (1999). The Influence of Thermo-Plastic Deformation on the Structure and Mechanical Properties of Powder Metallurgy Materials. In: Stojanović, B.D., Skorokhod, V.V., Nikolić, M.V. (eds) Advanced Science and Technology of Sintering. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-8666-5_71
Download citation
DOI: https://doi.org/10.1007/978-1-4419-8666-5_71
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4613-4661-6
Online ISBN: 978-1-4419-8666-5
eBook Packages: Springer Book Archive