The influence of Cr and Ce additions on the mechanical properties of Fe3Al based alloys

被引：13

作者：

Cieslar, M

Karlík, M

Benko, M

Cernoch, T

机构：

[1] Charles Univ, Dept Met Phys, CR-12116 Prague 2, Czech Republic

[2] Czech Tech Univ, Dept Mat, Prague 12000 2, Czech Republic

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2002年 / 324卷 / 1-2期

关键词：

Fe3Al; hardness; Cr-Fe-(C) precipitates; microstructure;

D O I：

10.1016/S0921-5093(01)01277-1

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The influence of Cr and Ce solutes on the hardness evolution of an Fe-28 at.% Al alloy during isothennal and isochronal annealing in the temperature range 300-1000degreesC was studied. In the Cr-containing alloys, Cr-Fe-(C) precipitates were found after hot working and cooling. These precipitates were dissolved during annealing at 1000degreesC for 2 h. Subsequent isothermal and isochronal annealing caused their reprecipitation starting above 300degreesC. Preferentially they nucleate on dislocations, nearest-neighbor antiphase boundaries and subgrain and grain boundaries. It appears that the precipitate formation decreases the hardness of the alloy. The Ce addition and the Ce-containing particles influence neither the formation of Cr-Fe-(C) precipitates nor the evolution of hardness of the alloy. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：23 / 27

页数：5

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