Texture changes during superplastic deformation of mechanically alloyed aluminium IN90211 |
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Authors: | Zhe Jin T R Bieler |
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Affiliation: | (1) Department of Materials Science and Mechanics, Michigan State University, 48824 East Lansing, MI, USA |
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Abstract: | Superplastic deformation of mechanically alloyed aluminium IN90211 was studied by texture analysis. The textures in three deformed specimens were investigated as a function of strain using the three-dimensional crystal orientation distribution functions (CODFs). The results for the two superplastically deformed specimens (425 °C, strain rate of 1 s–1, stress near 50 MPa, and 475 °C, initial strain rate of 77 s–1, about 110 MPa) indicate that at strains below about 2.0, the specimen deforms by grain-boundary sliding and single (or double) slip, and at larger strains the deformation is dominated by grain-boundary sliding, multiple slip and some recrystallization. At 475°C, 330s–1, and stress near 160 MPa, the specimen was above the superplastic regime, and the resulting texture changes with deformation were markedly different from superplastic results, and quite unusual. |
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