TITANIUM VT1-0 MICROSTRUCTURE EVOLUTION DURING COLD AND CRYOGENIC ROLLING |
| 2 | |
| 2013 |
| scientific article | 620.22 | ||
| 72-78 | titanium, cold rolling, cryogenic rolling (cryorolling), twinning, microstructure refinement, electron backscatter diffraction (EBSD) |
| Microstructure evolution of commercially pure titanium during rolling up to a reduction ratio of 93% at 77 K and 293 K has been studied. Straining at both temperatures is accompanied by twinning. At 77 K, grains are more exten- sively twinned in terms of the twinned grain fraction and the extension of the twinning stage. Rolling to 93% resulted in the formation of a microstructure with grain/subgrain sizes of ~80 nm at 77K and ~200 nm at 293 K, the ultimate ten- sile strength value amounted to 1180 and 910 MPa, respectively. The twinning effect on the microstructure refinement is discussed. |
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