THE EFFECT OF INTERSTITIAL ELEMENTS O AND B ON TRANSITION TEMPERATURE (A-B) OF Ti-35Nb-6Ta BIOMEDICAL ALLOY

被引：0
作者：
Malek, Jaroslav [1 ]
Hnilica, Frantisek [1 ]
Vesely, Jaroslav [1 ]
Rihova, Zuzana [2 ]
机构：
[1] UJP PRAHA AS, Prague, Czech Republic
[2] Czech Tech Univ, Fac Mech Engn, Dept Mat Sci, CR-16635 Prague, Czech Republic
来源：
METAL 2014: 23RD INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS | 2014年
关键词：
Beta-titanium alloy; transition temperature; interstitial elements; biomedical materials; BETA-TITANIUM ALLOYS; SUPERELASTICITY; OXYGEN; BORON;
D O I：
暂无
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The beta-transus temperature is very important for all beta-titanium alloys during their processing. This temperature is influenced by the chemical composition of the alloy. Interstitial elements (O, N, B) can strongly influence beta-transus temperature even in very low concentration. In this work the influence of O and B elements on transition temperature of Ti-35Nb-6Ta has been studied. Specimens with various additions of O or B were prepared. These specimens were aged at 500 degrees C for 24 hours in order to obtain equilibrium alpha+beta microstructure. Subsequently the specimens were annealed at various temperatures (with 50 degrees C or 10 degrees C increment) and water quenched. The microstructure was then studied. At lower temperature a-precipitates coarsening has been observed and at higher temperatures precipitates dissolution took place. It was find out that oxygen addition strongly influences the transition temperature (increase approximately 410 degrees C/ wt. %), but the effect of boron is weak (addition of 0.5 wt. % caused increase of 15 degrees C).
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页码：1116 / 1121
页数：6
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