It was found that on annealing supersaturated and cold rolled Al–4Cu at 280°C subgrains were initially formed as a result of the rearrangement of dislocations. Concurrent with the formation of subgrains having well defined boundaries, θ particles were formed, situated mostly on the subgrain boundaries, and the growth of subgrains was therefore severely hindered by the particles, leading to continuous recrystallisation for annealing times up to 10 000 min at 280°C. The pinning force due to particles located on the subgrain boundaries was much greater than that due to randomly dispersed particles. Subgrain growth was found to be arrested for particle parameters f/r of greater than 0·25 μm−1, where f is the particle volume fraction and r is the mean particle radius.
MST/1572
Get full access to this article
View all access options for this article.
References
1.
AHLBORNA., HORNBOGENE., and KOSTERU.: J. Mater. Sci., 1969, 4, 944.
2.
HORNBOGENE. and KREYEH.: in Proc. Symp. on ‘Texture’, (ed. WassermanG. and GrewenJ.), 274; 1969, Berlin, Springer-Verlag.
3.
KOSTERU. and HORNBOGENE.: Z. Metallkd, 1968, 59, 792.
4.
HORNBOGENE.: Prakt. Metallogr.,1970, 9, 349.
5.
CAHNR. W.: in ‘Recrystallisation, grain growth and texture’, (ed. MargionH., 99; 1966, Metals Park, OH, ASM.
6.
CAHNR. W.: in ‘Recrystallisation of metallic materials, (ed. HaessnerF., 43; 1971, Stuttgart, Germany, Reiderer-Verlag.
7.
HUH.: Trans. AIME, 1962, 224, 75.
8.
HUH.: in‘Recovery and recrystallisation of metals’, (ed. HimmelL.), 311; 1963, Wiley-Interscience.
9.
HUH.: in‘Electron microscopy and strength of crystals’, (ed. ThomasG. and WashburnJ.), 546; 1963, Wiley-Interscience.
10.
LIJ. C. M.: J. Appl. Phys.,1962, 33, 2958.
11.
SANDSTRÖMR.: Acta Metall., 1977, 25, 897.
12.
SANDSTRÖMR.: Acta Metall., 1977, 25, 905.
13.
BECKP. A., KREWERJ. C., PEMERL. J., and HOLZWORTHM. L.: Trans. AIME, 1948, 175, 372.
14.
SANDSTRÖMR., LEHTINENB., HEDMANE., GROZAI., and KARLSSONS.: J. Mater. Sci., 1978, 13, 1229.
15.
HIRTHJ. P. and LOTHEJ.: in ‘Theory of dislocations’, 2 edn, 553; 1982, Wiley-Interscience.
16.
JONESA. R. and HANSENN.: Acta Metall., 1981, 29, 589.
17.
DUGGANB. J. and HUTCHINSONW. B.: inProc. 4th European Conf. on ‘Texture and the properties of materials’, 292; 1975, London, The Metals Society.
18.
CHANH. M. and HUMPHREYSF. J.: Acta Metall., 1984, 32, 235.
19.
KOCKSU. F.: Philos. Mag.,1966, 14, 1629.
20.
FOREMANA. J. E. and MAKINM. J.: Philos. Mag.,1966, 14, 911.
21.
INOKUTIY. and DOHERTYR. D.: Acta Metall., 1978, 26, 61.
22.
AARONSONH. I., AARONH. B., and KINSMANK. R.: Metallography, 1971,4, 1.
23.
LAIRDC. and AmtoNsoNH. I.: Acta Metall., 1966, 14, 171.
24.
VAUGHAND. and SILCOCKJ. M.: Acta Metall., 1964, 12, 1463.
25.
VAUGHAND. and SILCOCKJ. M.: Phys. Status Solidi, 1967, 20, 725.
26.
CHANGS. K.: PhD thesis, Imperial College of Science, Technology and Medicine, London, 1989.
27.
van VLACKL. A.: ‘Elements of materials science and engineering’, 137; 1980, Addison-Wesley.
28.
DOHERTYR. D. and MARTINJ. W.: Trans. ASM, 1964, 57, 874.
29.
HELLMANP. and HILLERTM.: Scand. J. Metall.,1975, 4, 211.
30.
HAZZLEDINEP. M., P. 13. HIRSCH, and N. LOUAT: in Proc. ist Riso Symp. on ‘Recrystallisation and grain growth of multi-phase and particle containing materials’, (ed. N. Hansen et al.), 85; 1980, Roskilde, Denmark, Riso National Laboratory.
31.
NESE., RYUMN., and HUNDERIO.: Acta Metall., 1985, 33, 11.
32.
WORINFRC. H. and CABOA.: Acta Metall., 1987, 35, 2801.
33.
LOUATN.: Acta Metall., 1982, 30, 1291.
34.
LOUATN.: Philos. Mag.,1983, 47, 903.
35.
GJOSTEINN. and RHINEE. N.: Acta Metall., 1959, 7, 319.
