Texture and mechanical properties of EUROFER 97 steel processed by ECAP

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:528

Article

Eddahbi, M.¹  Monge, M. A.¹  Leguey, T.¹  Fernandez, P.²  Pareja, R.¹ 

[1] Univ Carlos III Madrid, Dept Fis, Madrid 28911, Spain

[2] CIEMAT, E-28040 Madrid, Spain

关键词: RAFM steels;    EUROFER 97;    ECAP processing;    Texture;    Microtexture;    Mechanical properties;   

DOI  :  10.1016/j.msea.2011.04.006

来源: Elsevier

【 摘 要 】

The EUROFER 97 steel was processed by equal channel angular pressing (ECAP) at 550 degrees C for four passes via route C. The starting material consisted of ferrite-martensite dual phase composed by small subgrains of about 0.5 mu m and low angle boundaries less than 5 degrees. The volume fraction of second phase particles was around 10 vol.%, besides a texture formed by several fibers orientations belonging to the zone axes < 110 >, < 111 > and < 112 >. Increasing ECAP deformation, this microstructure became into equiaxed grain structures of less than 1 mu m, and the misorientation between contiguous grains increased. This refinement of the microstructure was accompanied by the development of a new texture described by a family of fiber orientations related by rotations around axes < 110 > and < 111 >. Tensile tests have revealed that an ECAP treatment at 550 degrees C for two passes could significantly strengthen the tempered material still maintaining good ductility. (C) 2011 Elsevier B.V. All rights reserved.

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