| Title: |
Features of the Grain-Subgrain Structure of Ti49.8Ni50.2Alloy after Megaplastic Deformation by abc Pressing and Subsequent Annealing |
| Authors: |
Krukovskii, K. V., Lotkov, A. I., Grishkov, V. N., Gusarenko, A. A., Bobrov, D. I. |
| Source: |
Inorganic Materials: Applied Research; April 2024, Vol. 15 Issue: 2 p489-497, 9p |
| Abstract: |
Abstract: Using the backscattered electron diffraction method, the features of grain-subgrain structure of the Ti49.8Ni50.2(at %) alloy after megaplastic deformation by multiaxial forging (abc pressing) at 573 K and subsequent annealing were studied. It has been shown that the best detection of patterns of grain-subgrain structure of the Ti49.8Ni50.2alloy after a given true deformation of e= 9.55 and annealing at 773 K for 2 h is observed in zones without martensitic relief on the surface of a samples. The clearest backscattered electron diffraction patterns are observed in the central part of grains, and the quality of the Kikuchi lines deteriorates with distance from the grain center. Calculation based on the equivalent grain diameter showed that the average grain size is 0.203 ± 0.053 μm. Grains are mainly elliptical in shape with an axial ratio of 0.48. Elongated grains along their length have a discrete-continuous misorientation of the crystal structure, which can reach 5 degrees per 1 μm. |
| Database: |
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