Dislocation Hardening in a New Manufacturing Route of Ferritic Oxide Dispersion-Strengthened Fe-14Cr Cladding Tube

被引：0

作者：

Salliot, Freddy ^{[1
]}

Borbely, Andras ^{[2
]}

Sornin, Denis ^{[1
]}

Loge, Roland ^{[3
]}

Spartacus, Gabriel ^{[4
]}

Leguy, Hadrien ^{[1
]}

Baudin, Thierry ^{[5
]}

de Carlan, Yann ^{[1
]}

机构：

[1] Univ Paris Saclay, Serv Rech Mat & Procedes Avances, CEA, F-91191 Gif sur Yvette, France

[2] Univ Lyon, Ctr SMS, CNRS, Mines St Etienne,UMR LGF 5307, F-42023 St Etienne, France

[3] Ecole Polytech Fed Lausanne EPFL, PX Grp Chair, Thermomech Met Lab LMTM, CH-2002 Neuchatel, Switzerland

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

[5] Univ Paris Saclay, Inst Chim Mol & Mat Orsay, CNRS, F-91405 Orsay, France

来源：

MATERIALS | 2024年 / 17卷 / 05期

关键词：

ODS steel; microstructure; cold rolling; dislocation density; X-ray diffraction; EBSD; FBR CORE APPLICATION; STEELS; RECRYSTALLIZATION; PARTICLES; BEHAVIOR; ALLOYS; IMPROVEMENT; MORPHOLOGY; EVOLUTION; TEXTURE;

D O I：

10.3390/ma17051146

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The microstructure evolution associated with the cold forming sequence of an Fe-14Cr-1W-0.3Ti-0.3Y2O3 grade ferritic stainless steel strengthened by dispersion of nano oxides (ODS) was investigated. The material, initially hot extruded at 1100 degrees C and then shaped into cladding tube geometry via HPTR cold pilgering, shows a high microstructure stability that affects stress release heat treatment efficiency. Each step of the process was analyzed to better understand the microstructure stability of the material. Despite high levels of stored energy, heat treatments, up to 1350 degrees C, do not allow for recrystallization of the material. The Vickers hardness shows significant variations along the manufacturing steps. Thanks to a combination of EBSD and X-ray diffraction measurements, this study gives a new insight into the contribution of statistically stored dislocation (SSD) recovery on the hardness evolution during an ODS steel cold forming sequence. SSD density, close to 4.1015 m-2 after cold rolling, drops by only an order of magnitude during heat treatment, while geometrically necessary dislocation (GND) density, close to 1.1015 m-2, remains stable. Hardness decrease during heat treatments appears to be controlled only by the evolution of SSD.

引用

页数：16

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