Microstructural characterization of an extruded Mg-Ni-Y-RE alloy processed by equal channel angular extrusion

JOURNAL OF ALLOYS AND COMPOUNDS

卷:473

Article

Eddahbi, M.¹  Perez, P.²  Monge, M. A.¹  Garces, G.²  Pareja, R.¹  Adeva, P.² 

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

[2] CSIC, Ctr Nacl Invest Met, Madrid 28020, Spain

关键词: Magnesium alloys;    Severe plastic deformation;    Equal channel angular extrusion;    Texture;   

DOI  :  10.1016/j.jallcom.2008.05.064

来源: Elsevier

【 摘 要 】

Equal channel angular extrusion (ECAE) was performed in a conventionally extruded Mg-Ni-Y-RE material to develop fine-grained microstructures. The microstructure of the extruded alloy consisted of agglomerated phase particles zones (APZs) aligned along the extrusion direction and phase particles free zones (PFZs) containing recrystallized magnesium grains smaller than 5 mu m in size. Some PFZs contained a banded unrecrystallized structure. The global texture was very weak and described by a (1 0 0) fibre which is common in extruded magnesium alloys. PFZs grain size was reduced to less than 1 mu m after ECAE deformation at temperatures of 275,310 and 375 degrees C, although some PFZs remained unrecrystallized. The mechanical properties of ECAE deformed materials were correlated with grain size and texture. (C) 2008 Elsevier B.V. All rights reserved.

【 授权许可】

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