Ｍｏ添加によるＭＩＭ　Ｔｉ‐６Ａｌ‐４Ｖ合金の組織制御に関する検討

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タイトル別名
  • Microstructural Modification for Injection Molded Ti-6Al-4V Alloys by Addition of Mo Powder
  • Mo添加によるMIM Ti-6Al-4V合金の組織制御に関する検討
  • Mo テンカ ニ ヨル MIM Ti 6Al 4V ゴウキン ノ ソシキ セイギョ ニ カンスル ケントウ

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抄録

The metal injection molding process was applied to produce the microstructual modified Ti-6Al-4V alloy compacts using Ti, 60Al-40V alloy and fine Mo powders. To improve the tensile properties of the compacts with modification of microstructure, the effect of Mo content and sintering conditions on the microstructures and mechanical properties of the sintered compacts were investigated, and the characteristic X-ray images were also measured by means of electron probe micro analyzer to estimate the distribution of added Mo.<BR>The microstructures of sintered compacts were consisted of acicular α and intergranular β phases and the acicular α phase became fine with increasing Mo contents. The tensile strength of sintered compacts increased with increasing Mo contents. Although the elongation of sintered compacts slightly reduced with increasing Mo contents, these sintered compacts showed excellent ductility above 10% of elongation up to 4mass% of Mo contents. Eventually, the mechanical properties of the sintered compacts added 4mass% of Mo were improved to be 970MPa with 13.8% of elongation due to the fine microstructure.

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