Microstructure and mechanical properties of γ′ strengthened Co-Ni-Al-W-base ODS alloys

被引:13
|
作者
Zhang, Lin [1 ]
Qu, Xuanhui [1 ]
Qin, Mingli [1 ]
Rafi-ud-Din [1 ]
He, Xinbo [1 ]
Liu, Ye [1 ]
机构
[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing Key Lab Powder Met & Particulate Mat, Beijing 100083, Peoples R China
关键词
Alloys; Powder metallurgy; Electron microscopy; Microstructure; HIGH-TEMPERATURE STRENGTH; SUPERALLOY; PHASE; SYSTEM; DEFORMATION; REFINEMENT; STABILITY; FAILURE;
D O I
10.1016/j.matchemphys.2012.06.055
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
gamma ' precipitates strengthened Co-Ni-Al-W-base ODS alloys, produced by mechanical alloying, are promising high-temperature structural materials. The alloys were found to be composed of gamma/gamma ' two-phase region and discontinuously formed area. The element Ni was effective in enhancing the solubility limit of Al and W within gamma matrix, thus promoting the precipitation of gamma ' phase and restricting the formation of secondary phases, such as Co7W6, Co3W, and AlxCo phases. The flow stress of the alloys was effectively enhanced by the addition of Ni. The peak stress has decreased with increasing deformation temperature. The improved low-temperature strength was mainly attributed to the pining effect of oxide dispersion, gamma ' precipitates and fine-grained structure. The sharp fall in the yield strength in the temperature range of 600-700 degrees C was ascribed to grain boundary sliding, diffusion-controlled void formation, and the formation of shear band. (c) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:371 / 378
页数:8
相关论文
共 50 条
  • [21] Microstructure and mechanical properties of Fe-Ni-Mn-Al alloys
    Wittmann, MW
    Baker, I
    Hanna, JA
    Integrative and Interdisciplinary Aspects of Intermetallics, 2005, 842 : 35 - 40
  • [22] Microstructure, mechanical properties and wear of Ni-Al-Fe alloys
    Munroe, PR
    George, M
    Baker, I
    Kennedy, FE
    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 325 (1-2): : 1 - 8
  • [23] Mechanical properties and microstructural evolution of Mo-Co-co strengthened W-Ni-Fe alloys by spark plasma sintering
    Ding, L.
    Xiang, D. P.
    Pan, Y. L.
    Li, Y. Y.
    JOURNAL OF ALLOYS AND COMPOUNDS, 2017, 712 : 593 - 598
  • [24] Microstructure, texture and mechanical properties of hot rolled and annealed Ni-Fe-W and Ni-Fe-W-Co matrix alloys
    Rao, A. Sambasiva
    Manda, Premkumar
    Mohan, M. K.
    Nandy, T. K.
    Singh, A. K.
    JOURNAL OF ALLOYS AND COMPOUNDS, 2018, 742 : 937 - 951
  • [25] MICROSTRUCTURE, PHASE CONSTITUTION AND TENSILE PROPERTIES OF CO-NI-TI-AL BASE MULTIPHASE INTERMETALLIC ALLOYS
    MISHIMA, Y
    LEE, EH
    LIU, CT
    MATERIALS TRANSACTIONS JIM, 1995, 36 (08): : 1031 - 1040
  • [26] Effect of Cr and Ni/Fe Ratio on the Microstructure and Mechanical Properties of γ′-Strengthened Ni-Fe-Based Alloys
    Liu, Zhuo
    Tin, Sammy
    METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2023, 54 (03): : 838 - 853
  • [27] Effect of Cr and Ni/Fe Ratio on the Microstructure and Mechanical Properties of γ′-Strengthened Ni–Fe-Based Alloys
    Zhuo Liu
    Sammy Tin
    Metallurgical and Materials Transactions A, 2023, 54 : 838 - 853
  • [28] Formation, microstructure and mechanical properties of Al-Fe base quasicrystalline alloys
    Kimura, HM
    Sasamori, K
    Inoue, A
    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2000, 294 : 168 - 172
  • [29] Formation, microstructure and mechanical properties of Al-Fe base quasicrystalline alloys
    Kimura, H.M.
    Sasamori, K.
    Inoue, A.
    Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, 2000, 294-296 : 168 - 172
  • [30] Formation, microstructure and mechanical properties of Al-Fe base quasicrystalline alloys
    Kimura, H.M.
    Sasamori, K.
    Inoue, A.
    Materials Science and Engineering A, 2000, 294-296 : 168 - 172