Microstructural evolution and deformation features in gas turbine blades operated in-service

被引：50
作者：
Sun, Fei [1 ]
Tong, Jinyan [2 ]
Feng, Qiang [2 ,3 ]
Zhang, Jianxin [1 ]
机构：
[1] Shandong Univ, Key Lab Liquid Struct & Hered Mat, Minist Educ, Jinan 250061, Peoples R China
[2] Univ Sci & Technol Beijing, Natl Ctr Mat Serv Safety, Beijing 100083, Peoples R China
[3] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 618卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Gas turbine blades; Superalloy; Carbide; Dislocation; Transmission Electron Microscope (TEM); NICKEL-BASE SUPERALLOY; INTERFACIAL DISLOCATION NETWORKS; LOW-CYCLE FATIGUE; SHEAR CREEP DEFORMATION; SINGLE-CRYSTALS; TEMPERATURES; MECHANISM; DAMAGE; PARTICLES; STRESS;
D O I：
10.1016/j.jallcom.2014.08.246
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The nickel based superalloy GH4037 is employed in gas turbine blades because of its high temperature strength and oxidation resistance. Microstructural evolution and deformation features in gas turbine blades after 1600 h service have been investigated by Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). The microstructure of blade changes according to complex and comprehensive temperature and stress fields applied on it. Microstructural observations show that minor carbide precipitates dispersedly precipitate in the matrix. Two MC decomposition reactions occur: MC + gamma -> M23C6 + gamma' and MC + gamma M23C6 + eta. Blocky, closely spaced M23C6 particles continuously distribute along grain boundaries. The main deformation features, such as slip bands, APB-coupled dislocation pairs, stacking faults bound by partial dislocations and deformation twinning, have also been analyzed in terms of fundamental deformation mechanisms and environmental effects. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：728 / 733
页数：6
相关论文
共 39 条
  • [1] THRESHOLD STRESSES IN MATERIALS CONTAINING DISPERSED PARTICLES
    ARZT, E
    ASHBY, MF
    [J]. SCRIPTA METALLURGICA, 1982, 16 (11): : 1285 - 1290
  • [2] The microstructures of base/modified RR2072 SX superalloys and their effects on creep properties at elevated temperatures
    Chen, QZ
    Jones, N
    Knowles, DM
    [J]. ACTA MATERIALIA, 2002, 50 (05) : 1095 - 1112
  • [3] AN INSITU STUDY OF CUBE GLIDE IN THE GAMMA'-PHASE OF A SUPERALLOY .1. THE CONTROLLING MECHANISM
    CLEMENT, N
    COURET, A
    CAILLARD, D
    [J]. PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1991, 64 (03): : 669 - 695
  • [4] DEFORMATION MICROSTRUCTURES AFTER LOW-CYCLE FATIGUE AT 950-DEGREES-C IN NI-BASED SUPERALLOYS - THE EFFECT OF TEST CONDITIONS
    DECAMPS, B
    BRIEN, V
    MORTON, AJ
    [J]. SCRIPTA METALLURGICA ET MATERIALIA, 1994, 31 (07): : 793 - 798
  • [5] FIELD RD, 1992, SUPERALLOYS 1992, P557
  • [6] FLINN PA, 1960, T AM I MIN MET ENG, V218, P145
  • [7] Gabb J., 1986, SCRIPTA METALL, V20, P513
  • [8] THE ROLE OF INTERFACIAL DISLOCATION NETWORKS IN HIGH-TEMPERATURE CREEP OF SUPERALLOYS
    GABB, TP
    DRAPER, SL
    HULL, DR
    MACKAY, RA
    NATHAL, MV
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1989, 118 : 59 - 69
  • [9] Glatzel V., 1991, SCRIPTA METALL MATER, V25, P1845
  • [10] M23C6 precipitation behavior in a Ni-base superalloy M963
    He, LZ
    Zheng, Q
    Sun, XF
    Hou, GC
    Guan, HR
    Hu, ZQ
    [J]. JOURNAL OF MATERIALS SCIENCE, 2005, 40 (11) : 2959 - 2964
1234