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.
Original language | English |
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Pages (from-to) | 23-29 |
Number of pages | 7 |
Journal | Metallurgical Transactions A - Physical Metallurgy and Materials Science |
Volume | 9 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Jan 1978 |
Externally published | Yes |