Microstructure Change and Mechanical Properties in Binary Ti-Al Containing Ti3Al

被引:2
|
作者
Oh, Chang-Sup [1 ]
Woo, Sang-Woo [2 ]
Han, Chang-Suk [3 ]
机构
[1] Korea Inst Sci & Technol Informat, Reseat Program, Daejeon 34141, South Korea
[2] Hoseo Univ, Dept Nanobiotron, 20,Hoeo Ro 79 Beon Gil, Baebang Eup 31499, Asan, South Korea
[3] Hoseo Univ, Dept ICT Automot Engn, 20,Hoeo Ro 79 Beon Gil, Baebang Eup 31499, Asan, South Korea
来源
Korean Journal of Materials Research | 2016年 / 26卷 / 12期
关键词
grain morphology; phase stability; mechanical property; isothermal forging; compressive property;
D O I
10.3740/MRSK.2016.26.12.709
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Grain morphology, phase stability and mechanical properties in binary Ti-Al alloys containing 43-52 mol% Al have been investigated. Isothermal forging was used to control the grain sizes of these alloys in the range of 5 to 350 mu m. Grain morphology and volume fraction of alpha(2) phase were observed by optical metallography and scanning electron microscopy. Compressive properties were evaluated at room temperature, 1070 K, and 1270 K in an argon atmosphere. Work hardening is significant at room temperature, but it hardly took place at 1070 K and 1270 K because of dynamical recrystallization. The grain morphologies were determined as functions of aluminum content and processing conditions. The transus curve of alpha and alpha+gamma shifted more to the aluminum-rich side than was the case in McCullough's phase diagram. Flow stress at room temperature depends strongly on the volume fraction of the alpha(2) phase and the grain size, whereas flow stress at 1070 K is insensitive to the alloy composition or the grain size, and flow stress at 1270 K depends mainly on the grain size. The alpha(2) phase in the alloys does not increase the proof stress at high temperatures. These observations indicate that improvement of both the proof stress at high temperature and the room temperature ductility should be achieved to obtain slightly Ti-rich TiAl base alloys.
引用
收藏
页码:709 / 713
页数:5
相关论文
共 50 条
  • [1] KINETICS OF TI3AL GRAIN BOUNDARY PRECIPITATION IN TI-AL BINARY AND TI-AL-X TERNARY ALLOYS AND CORRELATION WITH MECHANICAL PROPERTIES
    CROSSLEY, FA
    [J]. METALLURGICAL TRANSACTIONS, 1970, 1 (07): : 1921 - &
  • [2] On the structure of the Ti3Al phase in Ti-Al and Ti-Al-Nb alloys
    Banumathy, S
    Ghosal, P
    Singh, AK
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2005, 394 (1-2) : 181 - 185
  • [3] Nanoscale origins of the oriented precipitation of Ti3Al in Ti-Al systems
    Wu, Hao
    Fan, Guohua
    Geng, Lin
    Cui, Xiping
    Huang, Meng
    [J]. SCRIPTA MATERIALIA, 2016, 125 : 34 - 38
  • [4] Effect of microstructure on Mechanical properties of Ti-Al based alloys
    Ding Xiao-fei
    Tan, Y.
    Zeng Bao-qing
    [J]. ADVANCED MATERIAL SCIENCE AND TECHNOLOGY, PTS 1 AND 2, 2011, 675-677 : 709 - +
  • [5] Influence of Microstructure Change on the Superplastic Properties of Ti3Al Base Alloy
    Liu, Yingying
    Yao, Zekun
    Luo, Xi
    Cao, Likun
    [J]. ADVANCED MATERIALS AND PROCESSING, 2007, 26-28 : 177 - +
  • [6] STRUCTURE AND MECHANICAL PROPERTIES Ti-Al
    Kommel, L. A.
    Ovcharov, V. K.
    Kodess, B. N.
    Teterin, G. P.
    Kisel, N. G.
    Ermolova, M. I.
    [J]. ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES, 1999, 55 : 91 - 91
  • [7] Optimum design, microstructure and mechanical properties of Ti/Ti3Al multi-layered materials
    Ma, L.
    He, X. D.
    Hu, Z. H.
    Sun, Y.
    [J]. 2006 BIMW: 2006 BEIJING INTERNATIONAL MATERIALS WEEK, PTS 1-4: MAGNESIUM, 2007, 546-549 : 1575 - +
  • [8] Effect of silicon on microstructure of Ti3Al alloys containing niobium
    Arrell, D
    Flower, HM
    West, DRF
    [J]. MATERIALS SCIENCE AND TECHNOLOGY, 1996, 12 (08) : 617 - 622
  • [9] MICROSTRUCTURE OF TI3AL BASED ALLOYS CONTAINING NIOBIUM AND SILICON
    CHEN, D
    ESSOUNI, M
    BEAVEN, PA
    WAGNER, R
    [J]. SCRIPTA METALLURGICA ET MATERIALIA, 1991, 25 (06): : 1363 - 1368
  • [10] ORDERING TRANSFORMATIONS AND MECHANICAL-PROPERTIES OF TI3AL AND TI3AL-NB ALLOYS
    SASTRY, SML
    LIPSITT, HA
    [J]. METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1977, 8 (10): : 1543 - 1552