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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >Microstructure of fine-grained β-type titanium alloy produced by mechanical alloying and consolidation process
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Microstructure of fine-grained β-type titanium alloy produced by mechanical alloying and consolidation process

机译：机械合金固结工艺制备的细晶β型钛合金的组织

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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, Ti_2Fe, existed in the material, leading to the deterioration of ductility of the consolidated material.
机译：对平均组成为Ti-15质量％Fe的钛和铁的混合粉末进行机械合金化（MA）处理。庚烷也用作碳的来源用于MA处理。 MA处理导致合金粉末的生产，其中所有成分都完全溶解在固溶体中。通过将经过MA处理的粉末固结（在1073 K下进行热轧），成功地获得了具有细晶组织的β型钛合金的块状材料。 TEM观察的结果发现，尺寸为200nm的TiC颗粒分散在β-Ti基质结构内。 β-Ti的平均晶粒尺寸约为1-2μm。尽管通过MA处理和固结工艺生产的细晶粒β型钛合金具有很高的硬度，但还发现材料中存在大量的亚稳态粗金属化合物Ti_2Fe，导致延展性降低。合并材料的数量。

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