Microstructure and metallic ion release of pure titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion

被引：45
作者：
Dimic, Ivana [1 ]
Cvijovic-Alagic, Ivana [2 ]
Voelker, Bernhard [3 ]
Hohenwarter, Anton [3 ]
Pippan, Reinhard [4 ]
Veljovic, Dorde [5 ]
Rakin, Marko [5 ]
Bugarski, Branko [5 ]
机构：
[1] Univ Belgrade, Innovat Ctr, Fac Technol & Met, Belgrade 11120, Serbia
[2] Univ Belgrade, Inst Nucl Sci Vinca, Belgrade 11001, Serbia
[3] Univ Leoben, Dept Mat Phys, A-8700 Leoben, Austria
[4] Austrian Acad Sci, Erich Schmid Inst Mat Sci, A-8700 Leoben, Austria
[5] Univ Belgrade, Fac Technol & Met, Belgrade 11120, Serbia
来源：
MATERIALS & DESIGN | 2016年 / 91卷
关键词：
High pressure torsion; Ultrafine-grained; Titanium; Ti-13Nb-13Zr alloy; Microhardness; Metallic ion release; SEVERE PLASTIC-DEFORMATION; MECHANICAL-PROPERTIES; BIOMEDICAL APPLICATIONS; NANOSTRUCTURED MATERIALS; MICROHARDNESS EVOLUTION; GRAIN-REFINEMENT; HEAT-TREATMENT; BEHAVIOR; TI; ADVANTAGES;
D O I：
10.1016/j.matdes.2015.11.088
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Significant enhancement of mechanical properties of metallic biomaterials can be achieved by grain refinement obtained by severe plastic deformation. The purpose of this study was to determine metallic ion release from commercially pure titanium (CPTi) and Ti-13Nb-13Zr alloy processed by high pressure torsion (HPT). The materials microstructures, in the initial state and after HPT deformation, were examined by scanning and transmission electron microscopy. The microhardness was determined along the radius of the disc-shaped samples of ultrafine-grained (UFG) CPTi and Ti-13Nb-13Zr alloy in order to evaluate homogeneity of HPT-processed materials. The quantities of released ions were determined using inductively coupled plasma-mass spectrophotometer for samples immersed in artificial saliva at 37 degrees C for 7 days. Also, the effect of artificial saliva pH value on metallic ion release was estimated. Obtained results revealed that the quantities of released ions from UFG CPTi and Ti-13Nb-13Zr alloy obtained by HPT process were higher than the quantities of released ions from CPTi and Ti-13Nb-13Zr alloy produced by traditional casting. This behavior can be explained by the fact that metallic ions are easily released from microstructure with smaller grains achieved by HPT process. (C) 2015 Elsevier Ltd. All rights reserved.
引用
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页码：340 / 347
页数：8
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