Low temperature flow behavior of B2 intermetallic phase in Ti-Al-Nb system

被引：9
作者：
Shankar, Hari
Prasad, N. Eswara
Singh, A. K.
Nandy, T. K. [1 ]
机构：
[1] Def Met Res Lab, Hyderabad 500058, Andhra Pradesh, India
[2] Indian Inst Technol, Kanpur 208016, Uttar Pradesh, India
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 424卷 / 1-2期
关键词：
intermetallic; Ti-Al-Nb system; Peierl;
D O I：
10.1016/j.msea.2006.02.048
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Low temperature flow behavior of polycrystalline B2 intermetallic in Ti-Al-Nb system has been studied in a range of temperature (77-298 K) and strain rate (10(-4) to 10(-3) s(-1)). To assess the rate limiting mechanisms, activation volume and energy have been determined. Relatively low values of activation volume (20-50b(3)) and activation energy (0.2 mu b(3)) suggest that a short-range obstacle that is Peierls barrier restricts the dislocation movement. Work hardening behavior of the intermetallic is also studied and contrasted with that of other B2 intermetallics. The intermetallic C exhibits extremely low rates of work hardening that is attributed to localized and planar flow. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：71 / 76
页数：6
相关论文
共 36 条
  • [11] A NEW MODEL FOR THE PEAK OF ACTIVATION AREA OF ALPHA-TITANIUM
    FARENC, S
    CAILLARD, D
    COURET, A
    [J]. ACTA METALLURGICA ET MATERIALIA, 1995, 43 (10): : 3669 - 3678
  • [12] FLEISCHER R, 1993, STRUCTURAL INTERMETA, P61
  • [13] FORST HJ, 1982, DEFORMATION MECHANIS, P8
  • [14] Effect of composition on the mechanical properties of newly developed Ti2AlNb-based titanium aluminide
    Germann, L
    Banerjee, D
    Guédou, JY
    Strudel, JL
    [J]. INTERMETALLICS, 2005, 13 (09) : 920 - 924
  • [15] Microstructure and mechanical properties of orthorhombic alloys in the Ti-Al-Nb system
    Gogia, AK
    Nandy, TK
    Banerjee, D
    Carisey, T
    Strudel, JL
    Franchet, JM
    [J]. INTERMETALLICS, 1998, 6 (7-8) : 741 - 748
  • [16] GOGIA AK, 1991, THESIS BANARAS HINDU
  • [17] GRAVES JA, 1992, MATER RES SOC SYMP P, V273, P31, DOI 10.1557/PROC-273-31
  • [18] Gray T. G., 2002, INTERMETALLIC COMPOU, V3, P361, DOI [10.1002/0470845856.ch19, DOI 10.1002/0470845856.CH19]
  • [19] DEFORMATION BEHAVIOR OF AGE-HARDENED TI-MO ALLOYS
    GYSLER, A
    LUTJERING, G
    GEROLD, V
    [J]. ACTA METALLURGICA, 1974, 22 (07): : 901 - 909
  • [20] TEMPERATURE AND STRAIN RATE DEPENDENCE OF FLOW-STRESS OF TANTALUM
    HOGE, KG
    MUKHERJEE, AK
    [J]. JOURNAL OF MATERIALS SCIENCE, 1977, 12 (08) : 1666 - 1672
1234