In-situ synchrotron HEXRD study on the phase transformation mechanisms of the ω-related phases in a Ti4Al3Nb alloy

被引：2
作者：
Guo, Xiang [1 ,2 ]
Song, Lin [1 ,2 ,4 ]
Liu, Xu [1 ,2 ]
Stark, Andreas [3 ]
Pyczak, Florian [3 ]
Zhang, Tiebang [2 ,4 ]
机构：
[1] NPU Shanghai, Collaborat Innovat Ctr, Shanghai 201108, Peoples R China
[2] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
[3] Helmholtz Zentrum Hereon, Inst Mat Phys, Max Planck Str 1, D-21502 Geesthacht, Germany
[4] Northwestern Polytech Univ, Chongqing Innovat Ctr, Chongqing 401135, Peoples R China
来源：
MATERIALS CHARACTERIZATION | 2023年 / 200卷
基金：
中国国家自然科学基金; 上海市自然科学基金;
关键词：
TiAl alloys; Ordered omega phase; In-situ synchrotron X-ray diffraction; Phase transformation; TIAL ALLOYS; BETA-PHASE; HIGH-NB; MICROSTRUCTURE; DECOMPOSITION; EVOLUTION; EXAMPLE;
D O I：
10.1016/j.matchar.2023.112901
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The omega-related phases in TiAl alloys have various structures and usually precipitate from the beta(o) phase. In the present study, the dissolution and precipitation of the omega ''/omega(o) phases in a Ti4Al3Nb alloy was investigated by means of in-situ synchrotron high energy X-ray diffraction. The results show that the." phase dissolves prior to the omega(o) phase during heating. During cooling, the omega(o) phase precipitates from beta(o) phase directly. Furthermore, the cooling rates significantly affect the precipitation temperatures of the omega-related phases. The morphology of the two phases was characterized by transmission electron microscopy. The distribution and size of the two phases vary with cooling rates. The nucleation mechanisms of the omega-related phases were also discussed.
引用
收藏
页数：6
相关论文
共 24 条
  • [1] Modeling concepts for intermetallic titanium aluminides
    Appel, F.
    Clemens, H.
    Fischer, F. D.
    [J]. PROGRESS IN MATERIALS SCIENCE, 2016, 81 : 55 - 124
  • [2] Omega phase transformation - morphologies and mechanisms
    Banerjee, S.
    Tewari, R.
    Dey, G. K.
    [J]. INTERNATIONAL JOURNAL OF MATERIALS RESEARCH, 2006, 97 (07) : 963 - 977
  • [3] THE FORMATION OF ORDERED OMEGA-RELATED PHASES IN ALLOYS OF COMPOSITION TI4AL3NB
    BENDERSKY, LA
    BOETTINGER, WJ
    BURTON, BP
    BIANCANIELLO, FS
    SHOEMAKER, CB
    [J]. ACTA METALLURGICA ET MATERIALIA, 1990, 38 (06): : 931 - 943
  • [4] Microstructure and fracture toughness of a β phase containing TiAl alloy
    Chen, Yuyong
    Niu, Hongzhi
    Kong, Fantao
    Xiao, Shulong
    [J]. INTERMETALLICS, 2011, 19 (10) : 1405 - 1410
  • [5] The decomposition of the beta phase in Ti-44Al-8Nb and Ti-44Al-4Nb-4Zr-0.2Si alloys
    Cheng, TT
    Loretto, MH
    [J]. ACTA MATERIALIA, 1998, 46 (13) : 4801 - 4819
  • [6] OMEGA PHASE TRANSFORMATION IN TITANIUM ALLOYS AS AN EXAMPLE OF DISPLACEMENT CONTROLLED REACTIONS
    DEFONTAINE, D
    PATON, NE
    WILLIAMS, JC
    [J]. ACTA METALLURGICA, 1971, 19 (11): : 1153 - +
  • [7] Solid-Solid Phase Transformations and Their Kinetics in Ti-Al-Nb Alloys
    Distl, Benedikt
    Hauschildt, Katja
    Pyczak, Florian
    Stein, Frank
    [J]. METALS, 2021, 11 (12)
  • [8] Theoretical investigation of the ω-related phases in TiAl-Nb/Mo alloys
    Hu, Qing-Miao
    Vitos, Levente
    Yang, Rui
    [J]. PHYSICAL REVIEW B, 2014, 90 (05)
  • [9] Ordered ω phases in a 4Zr-4Nb-containing TiAl-based alloy
    Huang, Z. W.
    [J]. ACTA MATERIALIA, 2008, 56 (08) : 1689 - 1700
  • [10] Advances in Gammalloy Materials-Processes-Application Technology: Successes, Dilemmas, and Future
    Kim, Young-Won
    Kim, Sang-Lan
    [J]. JOM, 2018, 70 (04) : 553 - 560
123