A Ti-6Al-4V alloy was hydrogenated to various levels and subjected to fracture toughness and conventional tensile testing. The results indicate that these particular properties are not unduly influenced by hydrogen contents of up to 490 ppm. Furthermore, the fracture resistance was not affected by a 20 h hold on load, although sustained load cracking did occur at high hydrogen contents. Nevertheless, transmission electron microscopy revealed that, at hydrogen concentrations in excess of 225 ppm, strain-induced hydride precipitation occurred ahead of the loaded crack tip.
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References
1.
WAISMANJ. L., SINESG., and ROBINSONL. B.: Metall. Trans. A, 1973, 4, 291.
2.
MEYND. A.: ibid., 1974, 5, 2405.
3.
WILLIAMSD. N.: Mater. Sci. Eng., 1976, 24, 53.
4.
YODERG. R., GRIFFITHSC. A., and CROOKERT. W.: ASME, J. Eng. Mater. Technol., 1974, 96, 268.
5.
CHUH. P.: Eng. Fract. Mech., 1972, 4, 675.
6.
WILLIAMSD. N.: Metall. Trans. A, 1973, 4, 675.
7.
SANDOZG.: Proc. Conf. on ‘Fundamental aspects of stress corrosion cracking’, Ohio State University, 1969, 684.
8.
PATONN. E. and WILLIAMSJ. C.: ‘Hydrogen in metals’, (ed. BernsteinI. M. and ThompsonA. W.) 409, 1974, Metals Park, Ohio, ASM.
9.
MARGOLINH.: Metall. Trans. A, 1976, 7, 1233.
10.
BOYERR. R. and SPURRW. F.: ibid., 1978, 9, 23.
11.
SPURLINGR. A.: ibid., 1975, 6, 1660.
12.
RHODESC. G. and WILLIAMSJ. C.: ibid., 1975,6, 1670.
13.
HALLI. W.: Scand. J. Metall., 1978, 7, 277.
14.
HALLI. W.: Metall. Trans. A, 1978, 9, 815.
15.
HALLI. W. and HAMMONDC.: Met. Sci., 1978, 12, 339.
16.
HALLI. W. and FIAMMONDC.: Mater. Sci. Eng., 1978, 32, 241.
17.
RICHARDSN. L. and BARNBYJ. T.: ibid., 1976, 26, 221.
18.
BOYDJ. D.: Trans. AS114, 1969, 62, 977.
19.
DUTTONR., NUTTALK.PULSM.P., and SIMPSONL. A. Metall. Trans. A, 1977, 8, 1553.
20.
LOUTHANM. R.: Trans. AIME, 1963, 227, 1166.
21.
SIMPSONC. J. and ELLSC. E.: J. Nucl. Mater., 1974, 52, 289.
