TY - JOUR
T1 - Microstructure of fine-grained β-type titanium alloy produced by mechanical alloying and consolidation process
AU - Tsuchiyama, T.
AU - Hamamoto, S.
AU - Nakashima, K.
AU - Takaki, S.
PY - 2008/2/15
Y1 - 2008/2/15
N2 - The mechanical alloying (MA) treatment was applied to the mixed powder of titanium and iron with average composition of Ti-15 mass%Fe. Heptane was also used for the MA treatment as a source of carbon. The MA treatment resulted in the production of alloyed powder in which all constituents were fully dissolved in the solid solution. By the consolidation of the MA-treated powder (hot rolling at 1073 K), a bulk material of β-type titanium alloy with fine-grained structure was successfully obtained. As a result of TEM observation, it was found that the TiC particles with a size of 200 nm were dispersed within the β-Ti matrix structure. The mean grain size of β-Ti was measured at around 1-2 μm. Although the fine-grained β-type titanium alloy produced by the MA treatment and consolidation process has very high hardness, it was also found that a significant amount of metastable coarse metallic compounds, Ti2Fe, existed in the material, leading to the deterioration of ductility of the consolidated material.
AB - The mechanical alloying (MA) treatment was applied to the mixed powder of titanium and iron with average composition of Ti-15 mass%Fe. Heptane was also used for the MA treatment as a source of carbon. The MA treatment resulted in the production of alloyed powder in which all constituents were fully dissolved in the solid solution. By the consolidation of the MA-treated powder (hot rolling at 1073 K), a bulk material of β-type titanium alloy with fine-grained structure was successfully obtained. As a result of TEM observation, it was found that the TiC particles with a size of 200 nm were dispersed within the β-Ti matrix structure. The mean grain size of β-Ti was measured at around 1-2 μm. Although the fine-grained β-type titanium alloy produced by the MA treatment and consolidation process has very high hardness, it was also found that a significant amount of metastable coarse metallic compounds, Ti2Fe, existed in the material, leading to the deterioration of ductility of the consolidated material.
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U2 - 10.1016/j.msea.2007.03.104
DO - 10.1016/j.msea.2007.03.104
M3 - Article
AN - SCOPUS:37649024067
SN - 0921-5093
VL - 474
SP - 120
EP - 127
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
IS - 1-2
ER -