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2361. http://www.issp.ac.ru/libm/papers/2004-18.pdf
... We find that an analysis of the stability of the grain shape during shrinkage or growth shows that any change in the regular 2D grain leads to changes in the shape. ... The way in which the curvature is distributed along the perimeter of a grain only gives rise only to second order corrections to the rate of change of area as a function of grain topology (number of sides). с 2004 Published by Elsevier Ltd. on behalf of Acta Materialia Inc. ... A grain whose shape is a ``convex isosceles triangle''. ...
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Ссылки http://www.issp.ac.ru/libm/papers/2004-18.pdf -- 320.7 Кб -- 25.06.2006
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2362. http://www.issp.ac.ru/libm/papers/2004-11.pdf
Scripta Materialia 50 (2004) 993-997 www.actamat-journals.com Diffusion controlled creep in nanocrystalline materials under grain growth Y. Estrin a a,* , G. Gottstein b, L.S. Shvindlerman b,c Institut fr Werkstoffkunde und Werkstofftechnik, TU Clausthal, Materials Science and Technology, Agricolastr. 6, u D-38678 Clausthal-Zellerfeld, Germany b Institut fr Metallkunde und Metallphysik, RWTH Aachen, Kopernikusstr. ... This will obviously reduce the deceleration of creep due to grain growth. ...
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Ссылки http://www.issp.ac.ru/libm/papers/2004-11.pdf -- 261.2 Кб -- 25.06.2006
[ Текст ] Ссылки http://www.issp.ac.ru/libm/papers/2004-15.pdf -- 261.2 Кб -- 25.06.2006
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[ Текст ] Ссылки http://www.issp.ac.ru/libm/papers/2004-15.pdf -- 261.2 Кб -- 25.06.2006
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2363. http://www.issp.ac.ru/libm/papers/2004-12.pdf
Scripta Materialia 50 (2004) 1051-1054 www.actamat-journals.com Precipitation accelerated grain growth L.S. Shvindlerman a a,b , G. Gottstein a,* Institut fr Metallkunde und Metallphysik, RWTH Aachen University, Kopernikusstr. ... In contrast to common conception it is shown that under certain conditions the precipitation of second-phase particles may accelerate grain boundary motion and, as a result, speed up grain growth in the system. The conditions under which this effect occurs are outlined. ...
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Ссылки http://www.issp.ac.ru/libm/papers/2004-12.pdf -- 263.1 Кб -- 25.06.2006
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2364. http://www.issp.ac.ru/libm/papers/2003-8.pdf
Materials Science Forum Vols. 426-432 (2003) pp. 4411-4416 online at http://www.scientific.net ? 2005 Trans Tech Publications, Switzerland All rights reserved. ... ID: 134.105.82.86-24/05/06,11:06:03) 4412 THERMEC'2003 Materials Science Forum Vols. 426-432 4413 4414 THERMEC'2003 Materials Science Forum Vols. 426-432 4415 4416 THERMEC'2003 ...
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Ссылки http://www.issp.ac.ru/libm/papers/2003-8.pdf -- 314.9 Кб -- 25.06.2006
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2365. http://www.issp.ac.ru/libm/papers/2002-7.pdf
... We have monitored the grain boundary profile, triple junction angles and rate of grain boundary migration with and without triple junctions as a function of grain size, grain misorientation, direction of migration and temperature in a series of configurations designed to ensure steady-state migration. ... Two simulation geometries designed to achieve steady-state boundary and triple junction migration and from which the steady-state triple junction mobility may be extracted are shown in Fig. ... Fig...
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Ссылки http://www.issp.ac.ru/libm/papers/2002-7.pdf -- 758.5 Кб -- 25.06.2006
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2366. http://www.issp.ac.ru/libm/papers/2001-24.pdf
... For the investigation of the mobility of triple junctions, the special geometry of the tricrystal is used containing an elongated grain boundary loop with parallel grain boundaries (Fig. ... However, already the first data on triple junctions reveal the MNR. ... The dependence of the migration activation enthalpy H on the pre-exponential (reduced) mobility factor A0 of 110 triple junctions in Al (triangles, TC = 490 C) [20] and of 110 tilt grain boundaries in Al (dashed line [9, 21], TC = 590 C). ...
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Ссылки http://www.issp.ac.ru/libm/papers/2001-24.pdf -- 59.7 Кб -- 25.06.2006
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2367. http://www.issp.ac.ru/libm/papers/2002-6.pdf
... 142432 Russia Received 21 February 2001; received in revised form 18 October 2001; accepted 22 October 2001 Abstract The process of grain growth in 2D systems is analyzed with respect to the controlling kinetics: from solely boundary kinetics, when grain growth in a polycrystal is determined by the Von NeumannґMullins relation, to exclusively triple junction kinetics, when grain growth is governed by the mobility of triple junctions. ... Grain boundary motion dragged by triple junctions 3.1. ...
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Ссылки http://www.issp.ac.ru/libm/papers/2002-6.pdf -- 128.7 Кб -- 25.06.2006
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2368. http://www.issp.ac.ru/libm/papers/2001-20.pdf
... The boundary mobility is strongly dependent on misorientation, which is attributed to both grain boundary structure and segregation. ... It is shown that grain boundary triple junctions have a finite mobility and thus, may have a serious impact on grain growth in fine grained materials. ... Accordingly, the angle is smaller than predicted by the equilibrium of grain boundary surface tensions, and the motion of the entire boundary system is controlled by the mobility of the triple junction. ...
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Ссылки http://www.issp.ac.ru/libm/papers/2001-20.pdf -- 195.5 Кб -- 25.06.2006
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2369. http://www.issp.ac.ru/libm/papers/2001-21.pdf
... Triple Junctions Effect on the Grain Growth in Nanostructured Materials S. PROTASOVA AND V. SURSAEVA Institute of Solid State Physics, Russian Academy of Sciences Chernogolovka, Moscow District, 142432, Russia Abstract. Microstructure evolution and grain growth in nanostructured aluminium films has been examined. ... Keywords: nanostructured aluminium films, grain growth, grain boundary, triple junction 1. ... Triple junctions have a dragging force on the normal grain growth in aluminium foils. ...
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Ссылки http://www.issp.ac.ru/libm/papers/2001-21.pdf -- 58.2 Кб -- 25.06.2006
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2370. http://www.issp.ac.ru/libm/papers/2001-15.pdf
Acta mater. 49 (2001) 673ґ681 www.elsevier.com/locate/actamat GRAIN GROWTH IN THIN METALLIC FILMS Y. ESTRIN1*, G. GOTTSTEIN2, E. RABKIN3 and L. S. SHVINDLERMAN2, 1 4 Department of Mechanical and Materials Engineering ... Academy of Sciences, Chernogolovka, Moscow District 142432, Russia ( Received 5 May 2000; accepted 15 October 2000 ) Abstract-- Grain growth in thin films deposited on a substrate was studied theoretically ... Keywords: Thin films; Grain growth; Vacancies 1. ...
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Ссылки http://www.issp.ac.ru/libm/papers/2001-15.pdf -- 152.9 Кб -- 25.06.2006
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2371. http://www.issp.ac.ru/libm/papers/2001-17.pdf
Scripta mater . 44 (2001) 893ґ 897 www.elsevier.com/locate/scriptamat APPLICATION OF THE THERMODYNAMIC THEORY OF IRREVERSIBLE PROCESSES TO NORMAL GRAIN GROWTH P.R. Rios1,2, G. Gottstein1 and L.S. Shvindlerman 1 2 1 Institut fur Metallkunde und Metallphysik, RWTH Aachen, D-52056 Aachen, ... Trabalhadores, 420, Volta Redonda, RJ, 27255-125 Brasil (Received July 26, 2000) (Accepted in revised form November 7, 2000) Keywords: Grain ... Total Grain Boundary Area vs. ... P. R. Rios, Scripta Mater. ...
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Ссылки http://www.issp.ac.ru/libm/papers/2001-17.pdf -- 137.7 Кб -- 25.06.2006
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2372. http://www.issp.ac.ru/libm/papers/2001-19.pdf
... 14, 52056 Aachen, ? Germany ( Received 21 November 2000; received in revised form 9 March 2001; accepted 20 March 2001 ) Abstract--The results of an investigation of the steady-state motion of grain boundary systems with triple junctions in high-purity aluminum are presented. ... In the hightemperature regime the motion of a connected grain boundary system is less affected by the triple junction, and, therefore, effectively controlled by the grain boundary mobility. ...
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Ссылки http://www.issp.ac.ru/libm/papers/2001-19.pdf -- 98.9 Кб -- 25.06.2006
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2373. http://www.issp.ac.ru/libm/papers/2000-21.pdf
... An analysis of numerical solutions of the set of eqs. (6) and (7) for a broad range of parameters has shown that for sufficiently small initial grain size 0 R0/d the grain growth uninhibited by vacancies is preceded by an incubation time during which the growth rate is substantially reduced, the time dependence of the grain size exhibiting a plateau-like behaviour, cf. ... By analogy with Ref. 3, the incubation time is defined as the time at which the grain growth rate is a maximum. ... Fig. ...
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Ссылки http://www.issp.ac.ru/libm/papers/2000-21.pdf -- 225.7 Кб -- 25.06.2006
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2374. http://www.issp.ac.ru/libm/papers/2000-22.pdf
Current Opinion in Solid State and Materials Science 5 ( 2001 ) 9 ґ 14 Grain boundary migration: misorientation dependence G. Gottstein a, *, D.A. Molodov a , L.S. Shvindlerman a , b , D.J. Srolovitz c , M. Winning b c a a ? Institut f ur Metallkunde und Metallphysik, RWTH Aachen, Kopernikusstr. ... An example is shown in Fig. 1, where the misorientation dependence of GB mobility ] b 5 A 0 exp(2Hm / A kT ) and its parameters for tilt GBs in pure aluminium ( 99.9995 at% ) is presented [**1]. ... Fig. ...
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Ссылки http://www.issp.ac.ru/libm/papers/2000-22.pdf -- 209.1 Кб -- 25.06.2006
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2375. http://www.issp.ac.ru/libm/papers/2000-20.pdf
Acta mater. 48 (2000) 397?403 www.elsevier.com/locate/actamat THE EFFECT OF TRIPLE-JUNCTION DRAG ON GRAIN GROWTH G. GOTTSTEIN 1{, A. H. KING 2 and L. S. SHVINDLERMAN 1 1, 3 Institut fur Metallkunde und Metallphysik, RWTH Aachen, D-52056 Aachen, Germany, 2School of х Materials Engineering, Purdue University, West Lafayette, IN 47907-1289, USA and 3Institute of Solid State Physics, Russian Academy of Science, Chernogolovka, Moscow distr. ... TRIPLE-JUNCTION DRAG Fig. ... TRIPLE-JUNCTION DRAG 399 Fig. ...
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Ссылки http://www.issp.ac.ru/libm/papers/2000-20.pdf -- 215.2 Кб -- 25.06.2006
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2376. http://www.issp.ac.ru/libm/papers/1999-30.pdf
... Orientation dependence of the grain boundary diusion Arrhenius parameters The temperature dependence of 195Au GB diusion of all bicrystals is shown in Figs 5(a)?(d) in Arrhenius coordinates. ... Structure dependence of Au and Cu GB diusion in Cu bicrystals The orientation dependence of GB diusion in the tilt angle range 33X218Y36X538 indicates a cusp of sdDGB and maxima of Arrhenius parameters, as determined from the lower temperature data, in the vicinity of the S 5 CSL GB, see Figs 3 and 6. ...
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Ссылки http://www.issp.ac.ru/libm/papers/1999-30.pdf -- 529.3 Кб -- 25.06.2006
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2377. http://www.issp.ac.ru/libm/papers/1999-28.pdf
Materials Science Forum Vols. 294-296 (1999) pp. 513-516 online at http://www.scientific.net ? 2005 Trans Tech Publications, Switzerland All rights reserved. ... ID: 134.105.82.86-24/05/06,11:08:10) 514 Intergranular and Interphase Boundaries in Materials Materials Science Forum Vols. 294-296 515 516 Intergranular and Interphase Boundaries in Materials ...
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Ссылки http://www.issp.ac.ru/libm/papers/1999-28.pdf -- 235.4 Кб -- 25.06.2006
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2378. http://www.issp.ac.ru/libm/papers/1999-21.pdf
... Printed in Great Britain S1359-6454(99)00240-2 1359-6454/99 $20.00 + 0.00 MISORIENTATION DEPENDENCE OF INTRINSIC GRAIN BOUNDARY MOBILITY : SIMULATION AND EXPERIMENT M. UPMANYU1,2, D. J. SROLOVITZ2,3{, L. S. SHVINDLERMAN G. GOTTSTEIN 5 1 4,5 and Department of Materials ... The activation energies for boundary migration varies with misorientation by more than 40% in the simulations and 50% in the experiments. ... MISORIENTATION DEPENDENCE clarify our understanding of grain boundary mobility. ...
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Ссылки http://www.issp.ac.ru/libm/papers/1999-21.pdf -- 898.8 Кб -- 25.06.2006
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2379. http://www.issp.ac.ru/libm/papers/1999-22.pdf
Materials Science Forum Vols. 294-296 (1999) pp. 521-524 online at http://www.scientific.net ? 2005 Trans Tech Publications, Switzerland All rights reserved. ... ID: 134.105.82.86-24/05/06,11:07:33) 522 Intergranular and Interphase Boundaries in Materials Materials Science Forum Vols. 294-296 523 524 Intergranular and Interphase Boundaries in Materials ...
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Ссылки http://www.issp.ac.ru/libm/papers/1999-22.pdf -- 216.3 Кб -- 25.06.2006
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2380. http://www.issp.ac.ru/libm/papers/1999-20.pdf
... If one is interested in vacancies of concentration c not too far from its thermodynamic equilibrium value ceq, a series expansion of G with respect to c Р ceq can be truncated after the quadratic term. ... Grain boundaries will remain stationary (``locked'') for a time t Р tУ t during which time grain growth induced vacancy concentration will relax back to ceq. ... Variation with time of the grain growth rate V (a) and the vacancy concentration c (b) (schematic). ...
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Ссылки http://www.issp.ac.ru/libm/papers/1999-20.pdf -- 211.6 Кб -- 25.06.2006
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