High-cycle fatigue properties at cryogenic temperatures in forged- and rolled-Ti–5% Al–2.5% Sn ELI alloys
| Autor: | Tetsumi Yuri, Hideshi Sumiyoshi, Yoshinori Ono, S. Matsuok, Toshio Ogata |
|---|---|
| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | Science and Technology of Advanced Materials. 4:301-307 |
| ISSN: | 1878-5514 1468-6996 |
| Popis: | High-cycle fatigue properties were investigated at 4, 77 and 293 K in Ti–5% Al–2.5% Sn ELI alloys, in which mean alpha grain sizes were about 30 mm in the rolled material and 80 mm in the forged material. The ultimate tensile strengths of both materials were almost same and increased with decreasing temperature. The fatigue strength of each material also tended to increase with decreasing temperature. At 293 K, the fatigue strength of each material was almost equivalent. At 4 and 77 K, however, the fatigue strength of the rolled material was higher than that of the forged material. Concerning the rolled material, the fatigue strengths at 106 cycles at 4 and 77 K were about 1.6 and 1.5 times higher than that at 293 K, respectively. On the other hand, in the forged material, it should be noted that the fatigue strengths in longer-life region (over 106 cycles) were almost equivalent not depending on test temperatures. Fatigue cracks initiated in the specimen interior independently of test temperature... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|