Microstructure and Mechanical Properties of Ti-Cu-Fe-Si-Nb Dendrite-Ultrafine Grained Composites with High Strength

被引：0
作者：
Wang H. [1 ]
Liu Y. [1 ,2 ]
Pang S. [1 ]
Zhang T. [1 ]
机构：
[1] Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing
[2] School of Physics and Nuclear Energy Engineering, Beihang University, Beijing
来源：
Xiyou Jinshu/Chinese Journal of Rare Metals | 2019年 / 43卷 / 01期
关键词：
Composite; Mechanical properties; Microstructure; Titanium alloys;
D O I：
10.13373/j.cnki.cjrm.XY18010049
中图分类号：
学科分类号：
摘要：
Ti64Cu25-xFe10Si1Nbx (x=1,3,5,7; %, atom fraction) dendrite-ultrafine grained composites free from biotoxic elements, exhibiting high strength and large plasticity at room temperature, were developed by composition design and copper mold casting. The influence of Nb content on microstructure and mechanical properties was investigated. It was found that the Ti64Cu25-xFe10Si1Nbx (x=1,3,5,7) alloys consisted of β-Ti phase, submicron CuTi2 phase and CuTi3 phase. With Nb contentincreasing, the volume fraction of β-Ti phase increased. When the Nb content was 5% and 7%, the β-Ti phase presented as dendrite and distributed evenly. The Ti-based alloys exhibited high compressive strength and hardness, which were 2125~2230 MPa and HV 505~HV 520, respectively. The plastic strain of the alloys was 3.4%~14.3%, which increased with Nb content increasing. Therefore, it was effective to tailoring the phase constituent and mechanical properties through Nb alloying. The Ti-Cu-Fe-Si-Nb alloys were promising for surgical devices materials in biomedical application. © Editorial Office of Chinese Journal of Rare Metals. All right reserved.
引用
收藏
页码：25 / 31
页数：6
相关论文
共 21 条
[1]  
Ma E., Eight routes to improve the tensile ductility of bulk nanostructured metals and alloys, The Journal of the Minerals, Metals and Materials Society, 58, 4, (2006)
[2]  
Koch C.C., Youssef K.M., Scattergood R.O., Murty K.L., Breakthroughs in optimization of mechanical properties of nanostructured metals and alloys, Advanced Engineering Materials, 7, 9, (2005)
[3]  
Kumar K.S., Swygenhoven H.V., Suresh S., Mechanical behavior of nanocrystalline metals and alloys, Acta Materialia, 51, 19, (2003)
[4]  
Kim K.B., Das J., Xu W., Zhang Z.F., Eckert J., Microscopic deformation mechanism of a Ti<sub>66.1</sub>Nb<sub>13.9</sub>Ni<sub>4.8</sub>Cu<sub>8</sub>Sn<sub>7.2</sub> nanostructure-dendrite composite, Acta Materialia, 54, 14, (2006)
[5]  
Eckert J., Das J., Kim K.B., Baier F., Loser W., Calin M., Zhang Z.F., Gerbert A., Deformation behavior of a Ti<sub>66</sub>Cu<sub>8</sub>Ni<sub>4.8</sub>Sn<sub>7.2</sub>Nb<sub>14</sub> nanostructured composite containing ductile dendrites, Journal of Alloys and Compounds, 434, 2, (2007)
[6]  
He G., Eckert J., Loser W., Schultz L., Novel Ti-based nanostructure-dendrite composite with enhanced plasticity, Nature Materials, 2, 1, (2003)
[7]  
He G., Loser W., Eckert J., In situ formed Ti-Cu-Ni-Sn-Ta nanostructure-dendrite composite with large plasticity, Acta Materialia, 51, 17, (2003)
[8]  
He G., Eckert J., Dai Q.L., Sui M.L., Loser W., Hagiwara M., Ma E., Nanostructured Ti-based multi-component alloys with potential for biomedical applications, Biomaterials, 24, 28, (2003)
[9]  
Kuhn U., Mattern N., Gebert A., Kusy M., Siegel U., Schultz L., Ductile Ti-based nanocrystalline matrix composites, Intermetallics, 14, 8, (2006)
[10]  
Xie G.Q., Qin F.X., Zhu S.L., Recent progress in Ti-based metallic glasses for application as biomaterials, Materials Transactions, 54, 8, (2013)
123