Microstructural design by combining nanograins and spinodal decomposition in a Fe-Cr alloy

被引：1

作者：

Macchi, Juan ^{[1
,4
]}

Nakonechna, Olha ^{[1
]}

Henry, Ronan ^{[1
]}

Castro, Celia ^{[1
]}

Edalati, Kaveh ^{[2
]}

De Geuser, Frederic ^{[3
]}

Sauvage, Xavier ^{[1
]}

Lefebvre, Williams ^{[1
]}

机构：

[1] Univ Rouen Normandie, Normandie Univ, CNRS, GPM UMR 6634,INSA Rouen Normandie, F-76000 Rouen, France

[2] Kyushu Univ, Int Inst Carbon Neutral Energy Res WPI I2CNER, WPI, Fukuoka, Japan

[3] Univ Grenoble Alpes, CNRS, Grenoble INP, SIMaP, F-38000 Grenoble, France

[4] GPM, Ave Univ, F-76800 St Etienne Du Rouvray, France

来源：

SCRIPTA MATERIALIA | 2024年 / 252卷

关键词：

Spinodal decomposition; HPT; APT; Fracture toughness; Micro-cantilever; TRANSMISSION ELECTRON-MICROSCOPY; SEVERE PLASTIC-DEFORMATION; ATOM-PROBE TOMOGRAPHY; AL-ZN; PRECIPITATION KINETICS; VACANCIES; DEFECTS; ENERGY;

D O I：

10.1016/j.scriptamat.2024.116247

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Microstructure design of new high-performance alloys requires the combination of multiple hardening mechanisms. This study explores combining nanograins with spinodal decomposition strengthening in an Fe-51.4Cr (at. %) alloy. High-pressure torsion (HPT) produced a nanostructure with a 51 nm grain size. Atom probe tomography analysis of deformed and annealed samples revealed spinodal decomposition after one hour of annealing. HPT accelerated decomposition kinetics is due to the high vacancy concentration. Microhardness remained stable due to spinodal hardening, despite a decrease in the Hall-Petch strengthening contribution. However, fracture toughness decreased.

引用

页数：6

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