IMPROVEMENT OF HIGH TEMPERATURE CREEP STRENGTH OF CONVENTIONAL GRADE 91 STEEL BY THERMOMECHANICAL TREATMENTS

被引：0
|
作者：
Hernandez, Rebeca [1 ]
Serrano, Marta [1 ]
Garcia-Junceda, Andrea [2 ]
Onorbe, Elvira [1 ]
Vivas, Javier
机构：
[1] CIEMAT, Dept Technol, Madrid, Spain
[2] Imdea Mat Inst, Madrid, Spain
来源：
PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE, 2019, VOL 6B | 2019年
关键词：
AUSTENITE GRAIN-SIZE; STRUCTURAL-MATERIALS; BEHAVIOR; REACTORS; EVOLUTION; DESIGN; T91;
D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The study of the enhanced creep strength of conventional ferritic-martensitic (F/M) grade 91 steel by a thermomechanical treatment (TMT) to increase the precipitation of MX particles in the matrix was performed. Creep properties were evaluated by tests at constant load at temperatures that varied from 600 C to 700 C with different levels of stress for both steels: T91 and T91-TMT. The creep curves and main parameters for both steels in the different conditions were analysed. Results show a great improvement of creep strength of the T91 after the thermomechanical treatment in comparison with the conventional steel. T91-TMT presents a rupture life significantly higher than T91 and a decrease of the values of the minimum creep rate. An increase of the density of MX precipitates in the matrix of the T91-TMT due to the thermomechanical treatment in comparison with T91 can be also observed. A change in the fractography was also detected. T91-TMT specimens showed signs of brittle fracture instead of the ductile fracture, with the common necking effect detected in the T91.
引用
收藏
页数：8
相关论文
共 50 条
  • [1] The creep strength of aberrant grade 91 steel
    Brett, Stephen James
    Bridges, Alex
    Purdy, Daniel
    MATERIALS AT HIGH TEMPERATURES, 2021, 38 (04) : 247 - 251
  • [2] HISTORY OF ALLOWABLE STRESSES IN JAPAN AND PERSPECTIVE ON IMPROVEMENT IN CREEP STRENGTH PROPERTY OF GRADE 91 STEEL
    Kimura, Kazuhiro
    Sawada, Kota
    JOINT EPRI - 123HIMAT INTERNATIONAL CONFERENCE ON ADVANCES IN HIGH-TEMPERATURE MATERIALS, 2019, 2019, : 47 - 59
  • [3] MICROSTRUCTURE AND CREEP STRENGTH OF GRADE 91 STEEL USED IN USC PLANTS
    Yaguchi, Masatsugu
    Nagai, Seiji
    Sawada, Kota
    Kimura, Kazuhiro
    ADVANCES IN MATERIALS TECHNOLOGY FOR FOSSIL POWER PLANTS: PROCEEDINGS FROM THE EIGHTH INTERNATIONAL CONFERENCE, 2016, 2016, : 446 - 457
  • [4] EFFECT OF AGING ON CREEP STRENGTH OF GRADE 91 STEEL WELD METAL
    Nakahashi, Sosuke
    Yaguchi, Masatsugu
    Tamura, Koji
    Minami, Yusuke
    ADVANCES IN MATERIALS TECHNOLOGY FOR FOSSIL POWER PLANTS: PROCEEDINGS FROM THE EIGHTH INTERNATIONAL CONFERENCE, 2016, 2016, : 1170 - 1181
  • [5] Effect of heat treatments on room temperature creep strain of a high strength steel
    Liu, C.
    Zhao, Z.
    Northwood, D.O.
    Key Engineering Materials, 2000, 171-174 : 403 - 410
  • [6] Effect of heat treatments on room temperature creep strain of a high strength steel
    Liu, C
    Zhao, Z
    Northwood, DO
    CREEP AND FRACTURE OF ENGINEERING MATERIALS AND STRUCTURES, 2000, 171-1 : 403 - 409
  • [7] Causes of heat-to-heat variation of creep strength in grade 91 steel
    Maruyama, K.
    Nakamura, J.
    Sekido, N.
    Yoshimi, K.
    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2017, 696 : 104 - 112
  • [8] Role of thermomechanical treatments in the production of high strength steel wire
    HAGUE DP
    Wire Industry, 1971, 38 (451): : 470 - 476
  • [9] Creep rupture behavior of Grade 91 steel
    Shrestha, Triratna
    Basirat, Mehdi
    Charit, Indrajit
    Potirniche, Gabriel P.
    Rink, Karl K.
    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2013, 565 : 382 - 391
  • [10] Room temperature creep of a high strength steel
    Liu, C
    Liu, P
    Zhao, ZB
    Northwood, DO
    MATERIALS & DESIGN, 2001, 22 (04): : 325 - 328
12345