This report is a study of structure, castability, mechanical properties as well as corrosion behaviour of titanium doped with up to 5 weight percentage (wt%) of a series of alloy elements, including Ta, Mo, Nb, Hf, Zr, Sn, Bi and Ag. The results indicate that, with addition of 1 wt% alloy element, Bi and Mo were most effective in enhancing the castability of titanium. With more alloy elements added, the castability values of most alloys more or less decreased. Except Ti-Mo system, all Ti alloys with a fine acicular morphology had the same crystal structure (hcp) as that of c.p. Ti with a typical lath type morphology. When 3 wt% or more Mo was added, a finer orthorhombic alpha'' phase was formed. The microhardness and bending strength values of Ti alloys were all higher than those of c.p. Ti. Among all alloys, Ti-Mo system exhibited the highest hardness and strength level. For a certain alloy, the bending strength did not necessarily increase with its alloy content. Except Ti-5Zr and Ti-Mo alloys, the bending moduli of most alloy systems were not much different from that of c.p. Ti. All alloys showed an excellent resistance to corrosion in Hanks' solution at 37 degrees C.

译文

本报告研究了掺有高达5重量百分比 (wt %) 的一系列合金元素 (包括Ta,Mo,Nb,Hf,Zr,Sn,Bi和Ag) 的钛的结构,可铸造性,机械性能以及腐蚀行为。结果表明,添加1 wt % 合金元素时,Bi和Mo最有效地提高了钛的可铸造性。随着添加更多的合金元素,大多数合金的可铸造性值或多或少会降低。除Ti-Mo体系外,所有具有细针状形态的Ti合金均具有与c.p.相同的晶体结构 (hcp)。具有典型板条型形态的Ti。当添加3 wt % 或更多Mo时,形成了更细的正交晶型 α'' 相。Ti合金的显微硬度和弯曲强度值均高于c.p.Ti。在所有合金中,Ti-Mo体系表现出最高的硬度和强度水平。对于某种合金,弯曲强度不一定随其合金含量而增加。除Ti-5Zr和Ti-Mo合金外,大多数合金体系的弯曲模量与c.p.没有太大差异。Ti。所有合金在汉克斯溶液中在37 ℃ 下均表现出优异的耐腐蚀性。

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