DISPERSION HARDENING EFFECTS OF NB-V PRECIPITATES IN MOD.9CR-1MO STEELS

被引：15
|
作者：
HAMADA, K
TOKUNO, K
TAKEDA, T
机构：
[1] Steel Research Laboratories, Nippon Steel Corporation, Futtsu, Chiba, 20-1, Shintomi
来源：
NUCLEAR ENGINEERING AND DESIGN | 1993年 / 139卷 / 03期
关键词：
D O I：
10.1016/0029-5493(93)90169-A
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
The mechanism of high creep strength of high nitrogen Mod.9Cr-1Mo steels was metallurgically investigated by using an analytical high resolution TEM. The threshold stress in the constituent equation, epsilon = A(sigma(a)-sigma(th))n exp(Q/RT), is strongly dependent on dispersion strengthening due to peculiar-shaped niobium-and-vanadium-precipitates, i.e. wing-like vanadium-nitrides ''V-wings'' adhering to spherical niobium-carbonitrides. Key factors of the strength are size and shape of the precipitates. Increase of nitrogen addition is effective to growth of V-wings leading to large threshold stress. Calculated stresses based on a dispersion strengthening showed a good fit with experimentally-measured stresses.
引用
收藏
页码：277 / 281
页数：5
相关论文
共 50 条
  • [1] Effect of trace amounts of S on the steam oxidation behavior for Mod.9Cr-1Mo steels
    Kutsumi, H
    Itagaki, T
    Abe, F
    TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 2002, 88 (09): : 520 - 525
  • [2] Fracture Toughness Characterization of Mod.9Cr-1Mo Welds
    Dutt, B. Shashank
    Shanthi, G.
    Moitra, A.
    STRUCTURAL INTEGRITY ASSESSMENT, ICONS 2018, 2020, : 535 - 543
  • [3] Creep degradation in welds of Mod.9Cr-1Mo steel
    Masuyama, Fujimitsu
    INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING, 2006, 83 (11-12) : 819 - 825
  • [4] Thermal treatment improving creep properties of nitrogen-added Mod.9Cr-1Mo steels
    Woo Seog Ryu
    Sung Ho Kim
    Transactions of the Indian Institute of Metals, 2010, 63 : 111 - 115
  • [5] Thermal treatment improving creep properties of nitrogen-added Mod.9Cr-1Mo steels
    Ryu, Woo Seog
    Kim, Sung Ho
    TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS, 2010, 63 (2-3): : 111 - 115
  • [6] LONG-TERM CREEP RUPTURE STRENGTH AND MICROSTRUCTURAL EVOLUTION OF WELDMENTS IN MOD.9CR-1MO STEELS
    Arisue, Ko
    Komai, Nobuyoshi
    Tominaga, Kimihiko
    Fujita, Masaaki
    ADVANCES IN MATERIALS TECHNOLOGY FOR FOSSIL POWER PLANTS: PROCEEDINGS FROM THE EIGHTH INTERNATIONAL CONFERENCE, 2016, 2016, : 1149 - 1159
  • [7] Modeling Creep-Fatigue Behavior of Mod.9Cr-1Mo Steel
    Li, Meimei
    Majumdar, S.
    Natesan, K.
    CREEP-FATIGUE INTERACTIONS: TEST METHODS AND MODELS, 2011, 1539 : 128 - 141
  • [8] Creep damage behavior of Mod.9Cr-1Mo steel welded joint
    Hongo, Hiromichi
    Tabuchi, Masaaki
    Li, Yongkui
    Takahashi, Yukio
    Zairyo/Journal of the Society of Materials Science, Japan, 2009, 58 (02) : 101 - 107
  • [9] Change in hardness and substructure during creep of Mod.9Cr-1Mo steel
    Endo, T
    Masuyama, F
    Park, KS
    TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 2002, 88 (09): : 526 - 533
  • [10] Improvement of Ω method to estimate creep behavior of a Mod.9Cr-1Mo steel
    Park, KS
    Masuyama, F
    Endo, T
    TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 1999, 85 (06): : 492 - 499
12345