Abstract
Sustained-load cracking (SLC) characteristics of Ti-6A1-4V are significantly influenced by 1) exposure temperature, 2) hydrogen content, and 3) basal plane crystallographic texture. The stress intensity applied to precracked specimens did not play a major role in affecting crack initiation or crack growth rate except that there would appear to be a required minimum level. Increasing hydrogen content raises the temperature at which SLC occurs and increases crack growth rate. A model for SLC has been proposed based on hydride precipitation at the crack tip and subsequent crack propagation by creep, cleavage, andJor interfacial separation at the hydrideJmatrix interface.
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Formerly with the Boeing Commercial Airplane Co., is presently an Engineering Consultant.
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Boyer, R.R., Spurr, W.F. Characteristics of sustained-load cracking and hydrogen effects in Ti-6AI-4V. Metall Trans A 9, 23–29 (1978). https://doi.org/10.1007/BF02647166
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DOI: https://doi.org/10.1007/BF02647166