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作者:

Wang, Man (Wang, Man.) | Sun, Hongying (Sun, Hongying.) | Zheng, Wenyue (Zheng, Wenyue.) | Zhou, Zhangjian (Zhou, Zhangjian.)

收录:

EI SCIE

摘要:

An Fe-18Ni-12Cr-based alumina-forming austenitic (AFA) steel with simple alloy design free of Nb and C was developed for potential application in advanced ultra-supercritical power plants. Creep behavior of the material was studied at the target application temperature of 700 °C. Creep properties were analyzed in terms of stress exponent (n), Monkman-Grant relationship and creep damage tolerance factor (λ). The microstructural evolution of crept samples was investigated by scanning electron microscope (SEM), electron back scatter diffraction (EBSD) and transmission electron microscope (TEM). The minimum creep rate decreased from 5.8 × 10−8 to 1.6 × 10-9 1/s with the applied stress decreasing from 140 to 80 MPa. Precipitation of B2-NiAl during the prolonged creep process contributed to improve creep resistance of the material. The related creep mechanism was found to be dislocation creep, which was supported by the value of n = 7.0 and by the crept microstructure of dislocations tangled with precipitations. Characterization results of creep fracture morphology indicate that the creep failure was resulted from microstructural degradation of precipitation coarsening. © 2020 Elsevier Ltd

关键词:

Alumina Aluminum oxide Austenite Austenitic stainless steel Coarsening Creep Creep resistance Morphology Scanning electron microscopy Transmission electron microscopy

作者机构:

  • [ 1 ] [Wang, Man]School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing; 100083, China
  • [ 2 ] [Wang, Man]College of Materials Science and Engineering, Beijing University of Technology, Beijing; 100124, China
  • [ 3 ] [Sun, Hongying]School of Mechanical Engineering, Anyang Institute of Technology, Anyang; 455002, China
  • [ 4 ] [Zheng, Wenyue]National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing; 100083, China
  • [ 5 ] [Zhou, Zhangjian]School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing; 100083, China

通讯作者信息:

  • [zheng, wenyue]national center for materials service safety, university of science and technology beijing, beijing; 100083, china

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来源 :

Materials Today Communications

年份: 2020

卷: 25

3 . 8 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:37

JCR分区:2

被引次数:

WoS核心集被引频次: 0

SCOPUS被引频次: 12

ESI高被引论文在榜: 0 展开所有

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