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
    Bermingham, M. J.
    McDonald, S. D.
    Nogita, K.
    John, D. H. St.
    Dargusch, M. S.
    [J]. SCRIPTA MATERIALIA, 2008, 59 (05) : 538 - 541
  • [3] The mechanism of grain refinement of titanium by silicon
    Bermingham, M. J.
    McDonald, S. D.
    Dargusch, M. S.
    StJohn, D. H.
    [J]. SCRIPTA MATERIALIA, 2008, 58 (12) : 1050 - 1053
  • [4] The elevated-temperature fatigue behavior of boron-modified Ti-6Al-4V(wt.%) castings
    Chen, W.
    Boehlert, C. J.
    [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
    Chen, W.
    Boehlert, C. J.
    Payzant, E. A.
    Howe, J. Y.
    [J]. INTERNATIONAL JOURNAL OF FATIGUE, 2010, 32 (03) : 627 - 638
  • [6] The mechanism of grain refinement in TiAl alloys by boron addition - an alternative hypothesis
    Cheng, TT
    [J]. INTERMETALLICS, 2000, 8 (01) : 29 - 37
  • [7] Effect of carbon on microstructure and mechanical properties of a eutectoid β titanium alloy
    Chu, M
    Jones, IP
    Wu, XH
    [J]. 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
    EARLY, PW
    BURNS, SJ
    [J]. SCRIPTA METALLURGICA, 1977, 11 (10): : 867 - 869
  • [10] A model of grain refinement incorporating alloy constitution and potency of heterogeneous nucleant particles
    Easton, MA
    StJohn, DH
    [J]. ACTA MATERIALIA, 2001, 49 (10) : 1867 - 1878
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