Evolutions on Microstructure and Impact Toughness of G115 Steel after Long-Term Aging at 700 °C

被引：0
|
作者：
Yu, Jianming [1 ]
Ma, Shaohai [1 ]
Liang, Kui [1 ]
Yan, Kai [1 ]
Yang, Xisheng [1 ]
Zhang, Shuli [1 ]
机构：
[1] China Special Equipment Inspect & Res Inst, Beijing 100029, Peoples R China
来源：
METALS | 2024年 / 14卷 / 08期
关键词：
aging process at high temperature; martensitic steels; precipitates; toughness; CRACK-GROWTH BEHAVIOR; HEAT-EXCHANGER; FERRITIC STEEL; DAMAGE MODEL; CREEP; TEMPERATURE; STRENGTH;
D O I：
10.3390/met14080921
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure and impact toughness evolution of G115 steel after long-term (ranging from 500 h to 10,000 h) aging at 700 degrees C were investigated in this study. The results showed that the microstructure of the G115 steel evolved from a finer-grained matrix with minor precipitates to a coarse-grained matrix with more precipitate with aging time, presenting a decrease in the local deformation degree in the matrix. The impact toughness of the steel decreased with aging time, presenting the largest decline at the initial aging times. The decrease in impact toughness was attributed to the coarsening of precipitates (M23C6 and Laves phase) in the steel matrix. The stable impact toughness during the whole aging process (from 500 h to 10,000 h) should be related to the comprehensive effects, including the precipitation of the Laves phase, the increase in high-angle grain boundaries, and the softening of the metal matrix.
引用
收藏
页数：13
相关论文
共 50 条
  • [41] The effect of microstructure evolution on the mechanical properties of martensite ferritic steel during long-term aging
    Xu, Yuantao
    Nie, Yihong
    Wang, Mingjia
    Li, Wei
    Jin, Xuejun
    ACTA MATERIALIA, 2017, 131 : 110 - 122
  • [42] Long-term creep rupture strength prediction for a new grade of 9Cr martensitic creep resistant steel (G115)-An application of a new tensile creep rupture model
    Jiang, C. C.
    Dong, Z.
    Song, X. L.
    Jia, J.
    Xiang, Z. D.
    JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, 2020, 9 (03): : 5542 - 5548
  • [43] EFFECT OF LONG-TERM AGING ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF ALLOY C276
    Liu Jinxi
    Zhang Jixiang
    Lu Yanling
    Li Xiaoke
    Li Zhijun
    Zhou Xingtai
    ACTA METALLURGICA SINICA, 2013, 49 (06) : 763 - 768
  • [44] Fatigue life modeling for a low alloy steel after long-term thermal aging
    Jin, Long
    Zhu, Ming-Liang
    Zhang, Shang-Lin
    Yang, Min
    Yu, Tian-Da
    Xuan, Fu-Zhen
    International Journal of Fatigue, 2025, 190
  • [45] The relationship between microstructure evolution and impact toughness degeneration of alloy 617B during long term aging
    Jiang, He
    Xiang, Xuemei
    Dong, Jianxin
    JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, 2022, 17 : 809 - 818
  • [46] THE EFFECT OF LONG-TERM IMPACT OF ELEVATED TEMPERATURE ON CHANGES IN MICROSTRUCTURE AND MECHANICAL PROPERTIES OF HR3C STEEL
    Zielinski, A.
    Sroka, M.
    Hernas, A.
    Kremzer, M.
    ARCHIVES OF METALLURGY AND MATERIALS, 2016, 61 (02) : 761 - 765
  • [47] QUANTITATIVE ANALYSIS OF STABILITY OF 9% Cr STEEL MICROSTRUCTURE AFTER LONG-TERM AGEING
    Golanski, G.
    Jasak, J.
    Zielinski, A.
    Kolan, C.
    Urzynicok, M.
    Wieczorek, P.
    ARCHIVES OF METALLURGY AND MATERIALS, 2017, 62 (01) : 263 - 271
  • [48] Microstructure of CB2 Steel before and after Long-term Creep Tests
    Jandova, Dagmar
    Kasl, Josef
    Chvostova, Eva
    METALLOGRAPHY XV, 2014, 782 : 311 - 318
  • [49] EFFECT OF LONG-TERM AGEING AT 475 °C ON PROPERTIES AND MICROSTRUCTURE OF CUSTOM 465 STEEL
    Roznovska, Gabriela
    Vodarek, Vlastimi
    Kubon, Zdenek
    METAL 2017: 26TH INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS, 2017, : 991 - 996
  • [50] Change of microstructure and toughness during the long-term aging of various steels for the first wall structural materials of fusion reactors
    Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, 81 (07):
12345