Importance of austenitization temperature and ausforming on creep strength in 9Cr ferritic/martensitic steel

被引：40

作者：

Vivas, J. ^{[1
]}

Capdevila, C. ^{[1
]}

Altstadt, E. ^{[2
]}

Houska, M. ^{[2
]}

San-Martin, D. ^{[1
]}

机构：

[1] Ctr Nacl Invest Met CENIM CSIC, Phys Met Dept, Mat Res Grp, Avda Gregorio Amo 8, Madrid 28040, Spain

[2] HZDR, Bautzner Landstr 400, D-01328 Dresden, Germany

来源：

SCRIPTA MATERIALIA | 2018年 / 153卷

关键词：

Small punch creep tests; MX nanoprecipitates; Creep ductility; Ausforming; Creep resistant steels; FERRITIC-MARTENSITIC STEELS; HEAT-RESISTANT STEELS; SMALL PUNCH TEST; THERMOMECHANICAL TREATMENT; MECHANICAL-PROPERTIES; RUPTURE STRENGTH; POWER-PLANTS; MICROSTRUCTURE; BEHAVIOR; LATH;

D O I：

10.1016/j.scriptamat.2018.04.038

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Small Punch Creep technique was used as a screening procedure to evaluate the creep properties of different microstructures developed in a thermomechanical simulator. The goal seek was to generate alternative microstructures in a conventional ferritic-martensitic G91 steel grade which boost thermal stability at temperatures as high as 700 degrees C. The developed microstructures allow studying the effect of the austenitization temperature optimized by thermodynamic calculations and the ausforming on the creep strength and ductility. The improvement in creep strength recorded was attributable to a higher number density of MX precipitates. By contrast, these microstructures showed an important reduction in creep ductility. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：14 / 18

页数：5

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