Preliminary measurements of the environmental cracking behaviour of titanium alloy 721 / G.J. Biefer and J.G. Garrison, Physical Metallurgy Division.: M34-20/132E-PDF
“In order to test the functioning of equipment, and to gain some initial experience concerning the environmental cracking susceptibility of Ti-7%Al-2%Nb-1%Ta (Ti-721) alloy, some tests were carried out on notched, precracked specimens loaded as cantilevers. In tests performed in 3.5% NaCl solution, it was confirmed that, subsequent to a sensitizing heat treatment designed to produce Ti3Al (8 hr at 650°C (1202°F)), alloy Ti-721 is extremely susceptible to environmental cracking. It is somewhat more resistant in the as-rolled condition. Environmental cracking tests in which specimens were broken under a gradually rising load were found to give very nearly the same results as did time-to-failure tests under a constant load. It appeared, therefore, that the rising-load method was sufficiently accurate for screening tests of alloys resembling Ti-721, though constant load tests might sometimes be needed for a more precise determination of the critical stress-intensity threshold for cracking, KISCC"--Abstract, p. i.
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| Department/Agency | Canada. Natural Resources Canada. Canada. Mines Branch. |
|---|---|
| Title | Preliminary measurements of the environmental cracking behaviour of titanium alloy 721 / G.J. Biefer and J.G. Garrison, Physical Metallurgy Division. |
| Series title | Technical bulletin ; TB 132 |
| Publication type | Series - View Master Record |
| Language | [English] |
| Format | Electronic |
| Electronic document | |
| Note(s) | Cover title. "February 1971." Digitized edition from print [produced by Natural Resources Canada]. Includes bibliographical references. Includes abstract in French. |
| Publishing information | Ottawa : Information Canada, 1971. |
| Author / Contributor | Biefer, G. J., 1921- Garrison, J. G. |
| Description | iv, 15 p. : chart, ill. |
| Catalogue number |
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| Departmental catalogue number | 300017 |
| Subject terms | Metals |