Effects of trace TiB2 on microstructure in cast titanium alloys

被引：9
作者：
Huang, L. G. [1 ,2 ]
Kong, F. T. [1 ]
Chen, Y. Y. [1 ]
Xiao, S. L. [1 ]
Xu, L. J. [1 ]
机构：
[1] Harbin Inst Technol, Natl Key Lab Precis Hot Proc Met, Harbin 150001, Peoples R China
[2] Liaoning Tech Univ, Coll Mat Sci & Engn, Fuxin 123000, Peoples R China
来源：
INTERNATIONAL JOURNAL OF CAST METALS RESEARCH | 2012年 / 25卷 / 06期
关键词：
Titanium alloy; Grain refining; Casting; Microstructure; TiB2; GRAIN-REFINEMENT; MECHANICAL-PROPERTIES; BORON ADDITION; COMPOSITES; MATRIX; TOUGHNESS; BEHAVIOR;
D O I：
10.1179/1743133612Y.0000000044
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Effects of trace TiB2 on solidification microstructure of Ti-6Al-4V alloy were investigated. The result shows that the microstructure of the ingot was refined by the added TiB2. The grain size and a lath size were reduced gradually with the increase in TiB2. The grain size is reduced by about an order of magnitude with an addition of 0.96wt-%TiB2, and the dendrite appears in the ingot. Such a tendency is similar to the change of the microstructure with boron addition. Ti-6Al-4V-B phase diagram and growth restriction factor Q are applied to analyse the influence mechanism of trace TiB2 on the microstructure.
引用
收藏
页码：358 / 363
页数：6
相关论文
共 26 条
[1]  
Bermingham MJ, 2008, J MATER RES, V23, P97, DOI [10.1557/jmr.2008.0002, 10.1557/JMR.2008.0002]
[2]   Effects of boron on microstructure in cast titanium alloys [J].
Bermingham, M. J. ;
McDonald, S. D. ;
Nogita, K. ;
John, D. H. St. ;
Dargusch, M. S. .
SCRIPTA MATERIALIA, 2008, 59 (05) :538-541
[3]   The mechanism of grain refinement of titanium by silicon [J].
Bermingham, M. J. ;
McDonald, S. D. ;
Dargusch, M. S. ;
StJohn, D. H. .
SCRIPTA MATERIALIA, 2008, 58 (12) :1050-1053
[4]   The elevated-temperature fatigue behavior of boron-modified Ti-6Al-4V(wt.%) castings [J].
Chen, W. ;
Boehlert, C. J. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 494 (1-2) :132-138
[5]   The effect of processing on the 455°C tensile and fatigue behavior of boron-modified Ti-6Al-4V [J].
Chen, W. ;
Boehlert, C. J. ;
Payzant, E. A. ;
Howe, J. Y. .
INTERNATIONAL JOURNAL OF FATIGUE, 2010, 32 (03) :627-638
[6]   The mechanism of grain refinement in TiAl alloys by boron addition - an alternative hypothesis [J].
Cheng, TT .
INTERMETALLICS, 2000, 8 (01) :29-37
[7]   Effect of carbon on microstructure and mechanical properties of a eutectoid β titanium alloy [J].
Chu, M ;
Jones, IP ;
Wu, XH .
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 2005, 14 (06) :735-740
[8]  
Early P.W., 1977, SCRIPTA MATER, V10, P867
[9]   IMPROVED TOUGHNESS FROM PRIOR BETA GRAINS IN TI-6AL-4V [J].
EARLY, PW ;
BURNS, SJ .
SCRIPTA METALLURGICA, 1977, 11 (10) :867-869
[10]   A model of grain refinement incorporating alloy constitution and potency of heterogeneous nucleant particles [J].
Easton, MA ;
StJohn, DH .
ACTA MATERIALIA, 2001, 49 (10) :1867-1878
123