期刊
MATERIALS TRANSACTIONS
卷 49, 期 1, 页码 41-46出版社
JAPAN INST METALS & MATERIALS
DOI: 10.2320/matertrans.ME200710
关键词
commercial purity titanium; severe plastic deformation; accumulative roll-bonding; annealing behavior; recrystallization
Ultrafine grained commercial purity titanium (CP-Ti) was fabricated by accumulative roll-bonding (ARB) process up to 6 cycles at ambient temperature. The microstructure was composed of the equiaxed grain structure having a mean grain size of 90nm and the lamellar boundary structure having a mean lamellar spacing of 70 nm. The specimen ARB processed by 6 cycles were subsequently annealed at various temperatures for 1.8ks. After annealing at 400 degrees C, the ARB specimen showed the partially recrystallized microstructure composed of recrystallized grains with grain size of approximately 0.5 mu m and the recovered ultratine structure. After annealing at 500 degrees C, the microstructure was filled with the equiaxed recrystallized grains having a mean grain size of approximately 2 mu m. The mechanical properties of the ARB processed and subsequently annealed specimens were investigated by tensile test. The tensile strength decreased and the total elongation increased continuously with increasing the annealing temperature. It was found that the tensile strength decreased linearly with increasing the total elongation in a strength-ductility balance plot, which was significantly different from the cases of Al and the interstitial free (IF) steel where the strength-elongation balance showed a trade-off relationship. The result indicates that ultrafine grained Ti has an excellent strength-ductility balance compared with Al and IF steel.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据