Abstract
The lengthening and thickening kinetics of θ allotriomorphs in Al-4 pet Cu were measured at 350°, 400°, and 450°C. Three different analyses all indicated that interfacial diffusion (i.e., a right angle collector plate mechanism) was the predominant growth mechanism at 350° and 400°C, but that volume diffusion directly to the growing allotriomorphs made a significant contribution to growth at 450°C. Using the data of this and previous investigations one may conclude that volume diffusion of solute directly to the allotriomorph does not contribute noticeably to growth belowT/T (solidus) = 0.78, plays a substantial but still a minority role atT/T (solidus) = 0.84 and 0.90 and becomes the major contributor atT/T (solidus) ≥ 0.91 when the matrix is fee.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
H.B. Aaron and H.I. Aaronson:Acta Met, 1968, vol. 16, p. 789.
A.D. Brailsford and H.B. Aaron:J. Appl. Phys., 1968, vol. 40, p. 1702.
B. Hawbolt and L.C. Brown:Trans. TMS-AIME, 1967, vol. 239, p. 1916; E. B. Hawbolt: Ph.D. Thesis, Univ. of British Columbia, 1967.
G. Thomas and M.J. Whelan:Phil. Mag., 1961, vol. 6, p. 1103.
J.B. Murphy:Acta Met., 1961, vol. 9, p. 563.
M. Hillert:Jernkontorets Ann., 1957, vol. 141, p. 757.
C. Zener:AIME Trans., 1946, vol. 167, p. 550.
G. Horvay and J.W. Cahn:Acta Met., 1961, vol. 9, p. 695.
A.J. Bradley and Phyllis Jones:J. Inst. Metals, 1933, vol. 51, p. 131.
H. B. Aaron and H. I. Aaronson:Acta Met, in press.
P.G. Shewmon:Diffusion in Solids, pp. 65, 171, McGraw-Hill Book Co., New York, 1963.
G. Horvay and J. W. Cahn: Dendritic and Spheroidal Growth, G. E. Research Report No. 60-RL-2561M, General Electric Research and Development Center, Schenectady.N.Y., 1960.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Goldman, J., Aaronson, H.I. & Aaron, H.B. Growth mechanisms of grain boundary allotriomorphs in Al-4Pct Cu at high homologous temperatures: Interfacial vs direct volume diffusion. Metall Trans 1, 1805–1810 (1970). https://doi.org/10.1007/BF02642774
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02642774