Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4921160 | Fusion Engineering and Design | 2017 | 8 Pages |
â¢Precipitation evolution behavior of cold-rolled V-5Cr-5Ti alloy was investigated.â¢There are two kinds of HCP structure precipitates in cold-rolled V-5Cr-5Ti alloy.â¢The precipitates were broken into small spherical particles during cold rolling.â¢The stable precipitates with FCC structure were formed after annealing.
The mechanical properties and precipitation behavior of V-5Cr-5Ti alloy were investigated after 80% cold rolling and annealing by optical microscopy, scanning electron microscopy, transmission electron microscopy (TEM), and tensile testing. The TEM analysis revealed that the cold-rolled V-5Cr-5Ti alloy had two kinds of precipitates with an hexagonal close-packed(HCP) structure. The rectangular precipitate had the following lattice parameters: a = 0.3041-0.3048 nm, c = 0.5153-0.5158 nm, and c/a = 1.69. The elliptically shaped precipitate had the following lattice parameters: a = 0.3080-0.3082 nm, c = 0.5003-0.5009 nm, and c/a = 1.62. The other precipitates had a face-centered cubic(FCC) structure. The precipitates were broken into small spherical particles, which were arranged in the vicinity of the band structure. After annealing (1273 K Ã 1 h), the stable precipitates were formed by increasing the components of Cr and N. The yield strength of cold-rolled V-5Cr-5Ti alloy after annealing was 21.5% higher than that before cold rolling, and the yield ratio increased from 0.69 to 0.79.