Formation mechanism of an α2 phase-rich layer on the surface of Ti-22Al-25Nb alloy

被引：11
|
作者：
Shao, Bin [1 ]
Wan, Shengxiang [1 ]
Xu, Wenchen [1 ]
Shan, Debin [1 ]
Guo, Bin [1 ]
Zong, Yingying [1 ]
机构：
[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Heilongjiang, Peoples R China
来源：
MATERIALS CHARACTERIZATION | 2018年 / 145卷
基金：
中国国家自然科学基金;
关键词：
Titanium aluminides; Oxidation; alpha(2) phase; Surfaces; AL-NB SYSTEM; OXIDATION RESISTANCE; TI2ALNB ALLOY; MICROSTRUCTURE; BEHAVIOR; TENSILE; 800-DEGREES-C; MEMBRANES; SUPPORTS; CREEP;
D O I：
10.1016/j.matchar.2018.08.030
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to investigate the formation mechanism of the alpha(2)-rich layer in the surface of the Ti-22A1-25Nb alloy, systematic analyses are carried out on the surface of the alloy by using SEM, XRD and EBSD. The results reveal that this alpha(2)-rich layer is formed by oxidation of the surface layer. In this surface oxidation layer, there are abundant Ti2O3 particles similar with the alpha(2) phase in structure. These Ti2O3 particles serve as nucleation points and lower the nucleation energy of the alpha(2) phase, promoting the precipitation and growth of alpha(2) phase on the surface layer of the alloy. This surface layer has a hardness of 684 HV, significantly exceeding the value of 312 HV for the interior of the alloy and thus considerably improves the surface properties of the alloy, serving as a high-performance, self-generated surface strengthening layer.
引用
收藏
页码：205 / 209
页数：5
相关论文
共 50 条
  • [1] Investigation of the phase transformations in Ti-22Al-25Nb alloy
    Shao, Bin
    Zong, Yingying
    Wen, Daosheng
    Tian, Yingtao
    Shan, Debin
    MATERIALS CHARACTERIZATION, 2016, 114 : 75 - 78
  • [2] The formation mechanism of tear strips on stretched Ti-22Al-25Nb alloy sheets
    Zong, Yingying
    Shao, Bin
    Xu, Wenchen
    Guo, Bin
    Shan, Debin
    SCIENTIFIC REPORTS, 2017, 7 (1)
  • [3] The formation mechanism of tear strips on stretched Ti-22Al-25Nb alloy sheets
    Yingying Zong
    Bin Shao
    Wenchen Xu
    Bin Guo
    Debin Shan
    Scientific Reports, 7
  • [4] Mechanism and morphology evolution of the O phase transformation in Ti-22Al-25Nb alloy
    Zong Yingying
    Wang Jiwei
    Shao Bin
    Tang Wei
    Shan Debin
    JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2021, 89 : 97 - 106
  • [5] Mechanism and morphology evolution of the O phase transformation in Ti-22Al-25Nb alloy
    Zong Yingying
    Wang Jiwei
    Shao Bin
    Tang Wei
    Shan Debin
    Journal of Materials Science & Technology, 2021, 89 (30) : 97 - 106
  • [6] Diffusion Bonding Process and Mechanism of Ti-22Al-25Nb Alloy
    Fu M.
    Zeng Y.
    Qian J.
    Liu G.
    Xiyou Jinshu/Chinese Journal of Rare Metals, 2020, 44 (12): : 1233 - 1239
  • [7] Solid diffusion bonding of Ti-22Al-25Nb O phase alloy
    Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
    Zhongguo Youse Jinshu Xuebao, 2008, 4 (577-582):
  • [8] Annealing response of the intermetallic alloy Ti-22Al-25Nb
    Dey, S. R.
    Roy, Shibayan
    Suwas, Satyam
    Fundenberger, J. J.
    Ray, R. K.
    INTERMETALLICS, 2010, 18 (06) : 1122 - 1131
  • [9] A study on transient liquid phase diffusion bonding of Ti-22Al-25Nb alloy
    Zou Gui-Sheng
    Me Er-Hu
    Bai Hai-Lin
    Wu Ai-Ping
    Wang Qing
    Ren Jia-Lie
    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2009, 499 (1-2): : 101 - 105
  • [10] In Situ Observation of Tensile Deformation of Ti-22Al-25Nb Alloy and Characterization of Deformation in α2 Phase
    Li, Dong
    Zeng, Weidong
    Zhang, Penghui
    Ma, Haoyuan
    Xu, Jianwei
    Ma, Xiong
    METALS, 2022, 12 (07)
12345