Evaluation of mechanical properties and anisotropy of ultra-fine grained 1050 aluminum sheets produced by incremental ECAP

被引:35
作者
Ciemiorek, M. [1 ]
Chrominski, W. [1 ]
Olejnik, L. [2 ]
Lewandowska, M. [1 ]
机构
[1] Warsaw Univ Technol, Fac Mat Sci & Engn, Woloska 141, PL-02507 Warsaw, Poland
[2] Warsaw Univ Technol, Inst Mfg Proc, Narbutta 85, PL-02524 Warsaw, Poland
关键词
Incremental ECAP; Lankford coefficient; Ultra-fine grained; Texture; Anisotropy; TEXTURE EVOLUTION; PURE ALUMINUM; R-VALUE; DEFORMATION; MICROSTRUCTURE; ALLOYS; FORMABILITY; REFINEMENT; NANOCRYSTALLINE; SIMULATION;
D O I
10.1016/j.matdes.2017.05.069
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Rectangular plates of technically pure 1050 aluminum processed by Incremental Equal Channel Angular Pressing were evaluated in terms of anisotropy and formability. After 8 passes, the plates exhibit in planar and through thickness isotropy which manifest by the independence of YS, UTS and r alpha -values on the testing direction and fairly uniform distribution of microhardness across thickness. Such properties were attributed to randomized texture developed during processing and uniform microstructure with ultrafine equiaxed grains in all three plate's planes. The values of the parameters describing ability for deep drawing are very promising as r values only slightly decrease with I-ECAP passes while they became independent on testing direction. This indicates that although the processed plates are slightly prone to wall thinning (typical for aluminum alloys), they are resistant to earing formation, which is one of the main technological problem in deep drawing. The combination of isotropic parameters, enhanced mechanical strength and suitable ability to deep drawing may yield attractive products with a considerable potential for further forming. [GRAPHICS] .
引用
收藏
页码:392 / 402
页数:11
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