618 SPS 法を用いた水素吸蔵処理による Ti 合金の組織微細化

概要

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This study is to produce TiC distributed Ti-6Al-4V composite material with fine grain to enhance the strength of Ti-6Al-4V alloy. The dispersed particles Mo_2C to Ti-6Al-4V alloy produced reactive precipitate TiC in the matrix during SPS sintering method. The titanium element has characteristic properties such as hydrogen absorption and dehydrogenation. It was shown that the process combination of particles dispersion and heavy strain work forming for Ti-6Al-4V alloy with hydrides TiH_2 were useful to decrease the grain size. It was found that the microstructure had an average grain size of less than 1μm and those decreased with in increasing of hydrogen content and TiC particles. For specimens with hydrogenation treatment, tensile strength increased more than 1.5 times in comparison with that of non-hydrogenated specimens.
一般社団法人日本機械学会の論文
2003-10-17