Abstract:The Ti-29Nb-13Ta-4.6Zr powder was compacted with a self-developed high velocity compaction machine. The effect of impact energy on density as well as mechanical properties was investigated. The results reveal that the green density increases with increasing impact energy, the green density reaches a maximum of 5.63 g/cm3 (relative density of 94.1%) with impact energy of 1 805 J. The radial spring back of the samples increase with increasing impact energy. After sintered in vacuum at 1 250 ℃, the sintered density increases with the increase of impact energy while the volume of the sintered compacts expand and the sintered compacts obtain the maximum density of 5.53 g/cm3 (relative density of 92.5%). After sintered for 2.0 h in vacuum, the sintered compacts obtain the highest tensile strength of 629.8 MPa and the highest hardness of 324.5 HV.
[1] Song X, Niinomi M, Tsutsumi H, et al. Effects of TiB on the mechanical properties of Ti-29Nb-13Ta-4.6Zr alloy for use in biomedical applications [J]. Materials Science and Engineering A, 2011, 528: 5600-5609.
[2] Raman V, Nagarajan S, Rajendran N. Electrochemical impedance spectroscopic characterization of passive film formed over β Ti-29Nb-13Ta-4.6Zr alloy [J]. Electrochemistry Communications, 2006, 8: 1309-1314.
[3] Kuroda D, Niinomi M, Masahiko M, et al. Design and mechanical properties of new β type titanium alloys [J]. Material Science and Engineering A, 1998, 243(1-3): 244-249.
[4] Akahori T, Niinomi M, Fukui H, et al. Improvement in fatigue characteristics of newly developed beta type titanium alloy for biomedical applications by thermo-mechanical treatments [J]. Material Scinece and Engineering C, 2005, 25(3): 248-254.
[5] Nakai M, Niinomi M, Hieda J, et al. Heterogeneous grain refinement of biomedical Ti-29Nb-13Ta-4.6Zr alloy through high-pressure torsion [J]. Scientia Iranica, 2013, 20(3): 1067-1070.
[6] Saito T, Takamiya H, Furtuta T. Thermomechanical properties of P/M βtitanium metal matrix composite [J]. Material Science and Engineering A, 1998, 243(1-2): 273-278.
[7] Eriksson M, Andresson M, Adolfssona E, et al. Titanium-hydroxyapatie composite biomaterial for detal implants [J]. Powder Metallurgy, 2006, 49(1): 70-77.
[8] Yan Z Q, Chen F, Cai Y X, et al. High velocity compaction of titanium powder and process characterization [J]. Powder Technology, 2011, 208: 596-599.
[9] Khan D F, Yin H Q, Li H, et al. Compaction of Ti-6Al-4V powder using high velocity compaction technique [J]. Material and Design, 2013, 50: 479-483.
[10] Yan Z Q, Chen F, Cai Y X, et al. Preparation and properties of Ti-4.5Al-6.8Mo-1.5Fe alloy by high-velocity compaction [J]. Powder Technology, 2013, 246: 345-350.
[11] 蔡一湘, 闫志巧, 陈峰, 崔亮. 高速压制成形纯钛粉的特性研究[J]. 粉末冶金技术, 2010, 28(5): 341-345.
[12] 果世驹, 迟悦, 孟飞, 杨霞.粉末冶金高速压制成形的压制方程[J].粉末冶金材料科学与工程, 2006, 11(1):24-28.
[13] 李超杰, 肖志瑜, 林小为, 吴苑标, 朱权利. 316L不锈钢粉末高速压制行为[J]. 粉末冶金材料科学与工程, 2012, 17(3): 350-355.
[14] 黄培云. 粉末冶金原理[M].北京:冶金工业出版社, 1982:202-203.
[15] 蔡一湘, 林炳, 黄培云. 钛铝金属粉末间的偏扩散成孔作用[J]. 中南矿冶学院学报, 1988, 19(5): 546-552.
[16] Li H, Yin H Q, Khan D F, et al. High velocity compaction of 0.9Al2O3/Cu composite powder[J]. Material and design, 2014, 54(5): 546-550.
[17] Khan D F, Yin H Q, Li H, et al. Effect of impact force on Ti-10Mo alloy powder compaction by high velocity compaction technique [J]. Material and Design, 2014, 54: 149-153.
[18] 黄培云. 粉末冶金原理[M].北京:冶金工业出版社,1982:384-389.