Effect of Silicon Addition on Microstructure and Mechanical Properties of Cast Titanium Alloys
Effect of Silicon Addition on Microstructure and Mechanical Properties of Cast Titanium Alloys
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DOI：
10.2320/matertrans.42.336
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发表时间：
2001-02
影响因子：
1.2
通讯作者：
Jun Zhu;A. Kamiya;Takahiko Yamada;A. Watazu;W. Shi;K. Naganuma
中科院分区：
文献类型：
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作者：
Jun Zhu;A. Kamiya;Takahiko Yamada;A. Watazu;W. Shi;K. Naganuma
为了开发一种新型医用种植体材料，利用牙科铸造机制备的小铸锭，研究了铸造Ti-Si合金的显微组织和力学性能。结果表明，硅的加入显著改变了钛合金的显微组织。当硅含量大于1.33质量%时，在α相和β相基体中析出Ti - 5si - 3金属间化合物。当硅含量超过2.35质量%时，化合物在钛基体晶界周围形成网状结构。此外，与纯钛和Ti-6Al-4V合金相比，Ti-Si合金在广泛的硅含量范围内表现出良好的强度和延展性。由于在强度和延展性之间取得了良好的平衡，铸造Ti-Si合金是牙科应用的有希望的候选人。
In order to develop a new kind of medical implant material, the microstructure and mechanical properties of cast Ti-Si alloys were investigated using small-size ingots prepared by a dental casting machine. The results show that the addition of silicon significantly changes the microstructure of titanium alloys. The Ti 5 Si 3 intermetallic compound precipitation occurs in the matrix of alpha and beta phases, when the silicon content is over 1.33 mass%. The compound is observed as a netted structure around grain boundaries of the titanium matrix when the silicon content exceeds 2.35 mass%. In addition, the Ti-Si alloys show a good combination of strength and ductility in a wide range of silicon content in contrast to the pure titanium and Ti-6Al-4V alloys. The cast Ti-Si alloys are promising candidates for dental applications because of a good balance between strength and ductility.