Abstract
The tensile properties, fracture toughness and stress corrosion cracking (SCC) behavior of HY-180 M steel at 22 °C were studied after final 5 h overaging treatments >510 ≤650 °C. SCC tests were conducted for 1000 h with compact tension specimens in aqueous 3.5 pct NaCl solutions at a noble (anodic) potential of −0.28 VSHE ( −0.48 VAg/AgC1) and a cathodic protection potential of −0.80 VSHE (−1.0 VAg/AgC1). The SCC resistance improved at aging temperatures >565 °C, the most significant improvement being at −0.80 VShe, especially after 650 ° aging whereK ISCC was raised to at least 110 MPa · m1/2. However, this was at the expense of mechanical properties. Provided low crack propagation rates of ∼3 X 10−11 m/s at −0.80V SHEmay be tolerated, the best compromise between strength, toughness, and SCC resistance was obtained after 594 °C aging. Under these conditions, stress intensities as high as ∼ 110 MPa · m1/2 can be used, with a yield strength of ∼ 1150 MPa and fracture toughness of ∼ 170 MPa · m1/2. The retained austenite content after aging increased with aging temperature up to 25 pct by vol at 650 °C. It appeared to correlate with improved SCC resistance, but other microstructural effects associated with aging may be involved.
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C.D. Little and P. M. Machmeier: Report No. 1, Contract No. F33615-73-C-5093, General Dynamics, Fort Worth Div., July 1974.
J. A. Snide: Ph.D. Thesis, Ohio State University, 1975.
S. R. Bala and D. Tromans:Met. Trans. A, 1978, vol. 9A, pp. 1125–32.
S. R. Bala and D. Tromans:Met. Trans. A, 1980, vol. 11A, in press.
R. O. Ritchie, M. H. Castro Cedeno, V. F. Zackay, and E. R. Parker:Met. Trans. A, 1978, vol. 9A, pp. 35–40.
B. L. Averbach and M. Cohen:Trans. AIME, 1948, vol. 176, pp. 401–15.
J. Durnin and K. A. Ridai:J. Iron Steel Inst., 1968, vol. 206, pp 60–67.
ASTM E399-72, ASTM, Philadelphia, PA, May 1972.
J. M. Marder and A. R. Marder:Trans. ASM Quart., 1969, vol. 62, pp. 1–10.
G. R. Speich, D. S. Dabkowski, and L. F. Porter:Met. Trans., 1973, vol. 4, pp. 303–15.
J. D. Landes and J. A. Begley: ASTM STP 560, p. 170, ASTM, Philadelphia, PA, 1974.
C. S. Carter:Corrosion, 1971, vol. 27, pp. 473–77.
P. A. Parrish, C. M. Chen, and E. D. Verink, Jr.: ASTM STP 610, H. L. Craig, Jr., ed., pp. 189–98, ASTM, Philadelphia, PA, 1976.
B. F. Brown:The Theory of Stress Corrosion Cracking in Alloys, 1. C. Scully, ed., pp. 186–203, NATO Sci. Äff. Div., Brussels, 1971.
S. K. Banerji, C. J. McMahon, Jr., and H. C. Feng:Met. Trans. A, 1978, vol. 9A, pp. 237–47.
C. L. Briant and S. K. Banerji:Met. Trans. A, 1979, vol. 10A, pp. 123–26.
R. A. Oriani:Acta Metall., 1970, vol. 18, pp. 147–57.
B. D. Craig:Acta Metall., 1977, vol. 25, pp. 1027–30.
M. R. Louthan, Jr. and R. G. Derrick:Corros. Sci., 1975, vol. 15, pp. 565–77.
N. R. Quick and H. H. Johnson:Acta Metall., 1978, vol. 26, pp. 903–07.
P. M. Machmeier, C. D. Little, M. H. Horowitz, and R. P. Oates:Met. Technol., 1979, vol. 6, pp. 291–96.
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Formerly Research Associate with theDepartment of Metallurgical Engineering , University of BritishColumbia
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Rao Bala, S., Tromans, D. Effect of overaging on mechanical properties and stress corrosion cracking of HY-180M steel. Metall Trans A 11, 1187–1196 (1980). https://doi.org/10.1007/BF02668142
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DOI: https://doi.org/10.1007/BF02668142