Mechanical properties of cast Ti-Hf alloys.
Mechanical properties of cast Ti-Hf alloys.
复制标题
DOI：
10.1002/jbm.b.30169
复制
发表时间：
2005-02
期刊：
影响因子：
--
通讯作者：
Hideki Sato;M. Kikuchi;M. Komatsu;O. Okuno;T. Okabe
中科院分区：
文献类型：
--
作者：
Hideki Sato;M. Kikuchi;M. Komatsu;O. Okuno;T. Okabe
本文研究了一系列Ti-Hf合金的力学性能。在氩弧熔化炉中，用钛和铪海绵制造具有10至40质量% Hf的钛合金。对浇铸到氧化镁基熔模铸造模具中的试样进行了屈服强度、抗拉强度、伸长率和弹性模量的测试。维氏显微硬度在离铸造表面25至600微米处测定。还进行了X射线衍射。商业纯钛（CP Ti）和纯钛制备从钛海绵作为对照。采用单因素方差分析和Student-Newman-Keuls检验（α = 0.05）分析数据（n = 5）。所有金属的衍射峰与α Ti的衍射峰相匹配;未发现β相峰。在所有Ti-Hf合金和CP Ti中，Hf >或= 25%的合金具有显著（p 0.05）的伸长率，而Hf >或= 30%的合金的伸长率显著（p < 0.05）低于纯Ti。测试的铸造Ti-Hf合金可以被认为是CP Ti的可行替代品，因为它们比CP Ti更强并且具有相似的伸长率。
This study examined the mechanical properties of a series of Ti-Hf alloys. Titanium alloys with 10 to 40 mass % Hf were made with titanium and hafnium sponge in an argon-arc melting furnace. Specimens cast into magnesia-based investment molds were tested for yield strength, tensile strength, percentage elongation, and modulus of elasticity. Vickers microhardness was determined at 25 to 600 microm from the cast surface. X-ray diffractometry was also performed. Commercially pure Ti (CP Ti) and pure Ti prepared from titanium sponge were used as controls. The data (n = 5) were analyzed with a one-way ANOVA and the Student-Newman-Keuls test (alpha = 0.05). The diffraction peaks of all the metals matched those for alpha Ti; no beta phase peaks were found. Alloys with Hf > or = 25% had significantly (p 0.05) in elongation among all the Ti-Hf alloys and CP Ti, whereas the elongation of alloys with Hf > or = 30% was significantly (p < 0.05) lower than that of the pure Ti. The cast Ti-Hf alloys tested can be considered viable alternatives to CP Ti because they were stronger than CP Ti and had similar elongation.