Cu precipitation-me diate d formation of reverted austenite during ageing of a 15-5 PH stainless steel

被引：33

作者：

Zhou, Tao ^{[1
]}

Neding, Benjamin ^{[1
]}

Lin, Sen ^{[1
]}

Tseng, Jo-Chi ^{[2
]}

Hedstrom, Peter ^{[1
]}

机构：

[1] KTH Royal Inst Technol, Dept Mat Sci & Engn, SE-10044 Stockholm, Sweden

[2] DESY, Deutsch Elektronen Synchrotron, D-22603 Hamburg, Germany

来源：

SCRIPTA MATERIALIA | 2021年 / 202卷

关键词：

Austenitic transformation; Precipitation; In situ X-ray diffraction; Atom probe tomography; Computational thermodynamics; MICROSTRUCTURE EVOLUTION; MECHANICAL-PROPERTIES; MARTENSITE; BEHAVIOR; DETECTOR; DICTRA;

D O I：

10.1016/j.scriptamat.2021.114007

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A Cu precipitation-mediated austenitic transformation during ageing treatment of a 15-5 PH stainless steel is revealed through atom probe tomography, in situ synchrotron X-ray diffraction and computational thermodynamics and kinetics. The austenitic transformation is proposed to occur through the pathway: Cu precipitation at the martensite/retained austenite interfaces or at martensite lath boundaries -> partitioning of austenite stabilizing elements towards interfaces of the Cu precipitates -> reverted austenite formation. (c) 2021 The Author(s). Published by Elsevier Ltd on behalf of Acta Materialia Inc. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/ )

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