Abstract
The effect of elevated temperature exposure on subsequent ambient temperature tensile behavior of aluminum-stainless steel composities (V f= 6.5 pct) has been studied. In particular, ambient temperature tensile yielding, flow, and fracture were correlated with the associated interface microstructures, matrix substructure, and fracture morphology in the as-pressed condition and following elevated-temperature exposure at 550°C (823 K) or 625°C (898 K) for 24 h (86.4 ks). Compared to the as-pressed condition, exposure at either temperature results in a small increase (≲4 pet) in initial modulus, and a decrease in the level of residual stress (tensile) in the matrix; tensile stress-strain behavior in stage II (matrix plastic, reinforcement elastic) is essentially unaffected. Lower strength levels in stage III (matrix and reinforcement plastic) after exposure are due to premature cracking in the interface reaction zone, primarily a ternary (Fe, Cr) Al intermetallic, with associated notch effects on the wire reinforcement. Changes in fracture surface morphology of the composites confirm the degradation. Wires extracted from composites after hot pressing or following exposure at 550°C (823 K) possess a unique strength. Exposure at 625°C (898 K) leads to a bimodal distribution in the strength of extracted wires. In each condition, a matrix dislocation cell structure develops in stage III; the invariant form and size of the cell structure withV f and distance from the matrix wire interface confirm isostrain conditions.
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M. J. Salkind:Interfaces in Composites, ASTM STP No. 452, 1969, p. 149.
B. J. Bayles, J. A. Ford, and M. J. Salkind:Trans. TMS-A1ME, 1967, vol. 239, p. 844.
N. Parratt:Chem. Eng. Progr., 1966, vol. 62, p. 61.
D. W. Petrasek and J. W. Weeton:Trans. TMS-AIME, 1964, vol. 230, p. 977.
D. W. Petrasek:Trans. TMS-A1ME, 1966, vol. 236, p. 887.
E. M. Breinan and K. G. Kreider:Met. Trans., 1970, vol. 1, p. 93.
K. G. Kreider, L. Dardi, and K. Prewo:Metal Matrix Composite Technology, United Aircraft Research Laboratories, Tech. Report No. AFML-TR-70-193, July, 1970.
I. D. Blucher, W. R. Spencer, and W. F. Stuhrke:Transmission and Scanning Electron Microscopy of Boron-Aluminum Interfaces, 17th Refractory Composites Working Group, Williamsburg, Va., June 1970.
A. G. Metcalfe:J. Compos. Mater, 1967, vol. 1, p. 356.
P. W. Jackson and J. R. Marjoram:J. Mater. Sci., 1970, vol. 5, p. 9.
R. E. Tressler and T. L. Moore:Metals Eng. Quart., 1971, vol. 11, no. 1, p. 16.
M. R. Pinnel and A. Lawley:Met. Trans., 1970, vol. 1, p. 1337.
M. R. Pinnel and A. Lawley:Met. Trans., 1971, vol. 2, p. 1415.
M. E. Fint:ASTM Bull., No. 181, 1952, p. 20.
A. R. Zecca, D. R. Hay, and H. Krajewski: TMS-AIME Spring Meeting, DMIC Memorandum 243, 1969, p. 65.
M. R. Pinnel and A. Lawley:Proc. Electron Microscopy Soc. Amer., 26th Meeting, 1968, p. 34.
H. W. Rauch, W. H. Sutton, and L. E. McCreight: AFML-TR-66-365, 1966, p. 31.
T. Henmann and S. Dittrich:Z. Metallk., 1959, vol. 50, p. 617.
A. K. Kurakin:Phys. Metals Metallogr., 1970, vol. 30, p. 216.
H. R. Lee, D. A. Ryder, and T. J. Davies:Int. J. Mech. Sci., 1970, vol. 12, p. 739.
C. Schoene and E. Scala:Met. Trans., 1970, vol. 1, p. 3466.
L. Roesch and G. Henry:Electron Fractography, Special Techn. Pub. No. 453, American Society for Testing and Materials, 1969, p. 3.
E. R. Thompson, D. A. Koss, and J. C. Chestnutt:Met. Trans., 1970, vol. 1, p. 2807.
R. W. Heckel, R. J. Zaehring, and H. P. Cheskis:Met. Trans., 1972, vol. 3, p. 2507.
H. P. Cheskis and R. W. Heckel:Met. Trans., 1970, vol. l, p. 1793.
A. A. Baker,Appl. Mater. Res., 1966, vol. 5, p. 143.
A. G. Metcalfe and G. K. Schmitz:Proc. ASTM, 1964, vol. 64, p. 1075.
B. W. Rosen:Fiber Composite Materials, ASM, 1965, p. 37.
P. M. Scop and A. S. Argon:SAMPE. Proc., 1966, vol. 10, p. G-21.
B. W. Rosen:Proc. Roy. Soc., London, 1970, vol. A319, p. 79.
C. Zweben:AIAA J., 1968, vol. 6, p. 2325.
C. Zweben and B. W. Rosen:J. Mech. Phys. Solids, 1970, vol. 18, p. 189.
P. R. Swann:Electron Microscopy and Strength of Crystals, G. Thomas and J. Washburn, Eds., p. 131, Interscience, New York, 1963.
J. R. Hancock,J. Compos. Mater., 1967, vol. 1, p. 136.
J. R. Hancock and J. C. Grosskrentz:Metal Matrix Composities, ASTM, Special Tech. Publ. No. 438, 1968, p. 134.
K. K. Chawla and M. Metzger,J. Mater. Sci., 1972, vol. 7, p. 34.
A. Kelly and H. Lilholt:Phil. Mag., 1969, vol. 20, p. 311.
G. Garmong and L. A. Shepard:Met. Trans., 1971, vol. 2, p. 175.
W. W. Gerberich:J. Mater. Sci., 1970, vol. 5, p. 283.
W. W. Gerberich:J. Mech. Phys. Solids, 1971, vol. 19, p. 71.
K. F. J. Heinrich,Quantitative Electron Probe Microanalysis, National Bureau of Standards Sp. Publ., 1958, p. 298.
Aluminum in Iron and Steel, S. L. Case and K. R.Van Horn, Eds., p. 273, John Wiley, New York, 1953.
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Formerly with Drexel University, is Research Metallurgist, Franklin Institute Research Laboratories, Philadelphia, Pa.
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Pattnaik, A., Lawley, A. Effect of elevated temperature exposure on the structure, stability, and mechanical behavior of aluminum-stainless steel composites. Metall Trans 5, 111–122 (1974). https://doi.org/10.1007/BF02642934
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DOI: https://doi.org/10.1007/BF02642934