The solidification microstructure of biomedical titanium alloys under the centrifugal force

被引：0

作者：

Chen, Ziyong ^{[1
]}

Xu, Lijuan ^{[1
]}

Liu, Zhiguang ^{[1
]}

Chen, Yuyong ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2006年 / 20卷 / 25-27期

关键词：

titanium alloys; solidification microstructure; arborescent crystal; equiaxed crystal; solidification defect;

D O I：

10.1142/S0217979206041896

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Two biomedical alloys, Ti-39Nb-5.1Ta-7.1Zr (TNTZ1) and Ti-35.3Nb-5.1Ta-7.1Zr(TNTZ2) were melted using LZ5 type centrifugal equipment for casting titanium. The solidification microstructures of TNTZI and TNTZ2 alloys cast in graphite crucible without centrifugal force are mostly big arborescent crystal with dispersed porosity in it. After pouring into a graphite mould under centrifugal force, the lower part of ingot showed mostly arborescent crystals with few equiaxed crystals, while the upper part of ingot is basically spherical equiaxed crystals. The solidification defects, such as dispersed pores were very difficult to find. Nb is supposed to refine the arborescent crystals. X-ray diffraction (XRD) analysis showed Ti-phase and Nb-phase existing in the above two alloys. The content of Ti was found relatively low in crystal interior and relatively high in crystal boundary. The content of Nb/Zr was uniform in whole microstructure.

引用

页码：4685 / 4690

页数：6

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