ニオブを添加した生体用β型チタン-ジルコニウム基合金の相安定性と力学的性質

DOI Web Site Web Site 被引用文献7件 参考文献21件

書誌事項

タイトル別名
  • Phase Stability and Mechanical Properties of Biomedical β type Titanium-Zirconium Based Alloys Containing Niobium
  • ニオブ オ テンカ シタ セイタイヨウ ベータガタ チタン ジルコニウムキ ゴウキン ノ ソウ アンテイセイ ト リキガクテキ セイシツ
  • Phase Stability and Mechanical Properties of Biomedical β type Titanium-Zirconium Based Alloys Containing Niobium

この論文をさがす

抄録

Phase stability and mechanical properties of Ti-Zr based alloys containing Nb as β stabilizer were investigated. Phase stability of annealed and quenched alloys with various Nb concentration were examined by optical microscopy and X-ray diffractometry while mechanical properties of the alloys were evaluated by hardness and tensile tests. Young’s moduli were also measured by free-free beam resonance method.<BR>Because Widmanstatten structure is observed in annealed 0-4 mol%Nb alloys while a two-phase structure is seen in annealed alloys containing more than 8 mol%Nb, it is considered that of α transus lays around 4-8 mol%Nb at room temperature. In the case of quenched alloys, alloys containing 0-4 mol%Nb exhibit martensitic transformed structure while alloys with more than 8 mol%Nb remain in a β single phase structure. Through microscopy and X-ray diffractometry, β phase stability in Ti-Zr-Nb system was considered and a Ti-Zr equiatomic isoplethal toward Nb corner in the Ti-Zr-Nb ternary phase diagram showing MS temperature was established.<BR>Hardness and strength of β phase alloys are lower than those of martensitic alloys. Ductility of the former is larger than the latter. This might be caused by the deformability of bcc structure. Young’s moduli of β alloys are 74-90 GPa which are smaller than those of CP titanium (105 GPa). Those moduli correspond well with data in references.<BR>From the results above, it is concluded that development of biomedical alloys with low elastic modulus is promising using titanium and zirconium as base materials and niobium as β stabilizer.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 64 (11), 1120-1126, 2000

    公益社団法人 日本金属学会

被引用文献 (7)*注記

もっと見る

参考文献 (21)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ