Grain structure evolution during cryogenic rolling of alpha brass

JOURNAL OF ALLOYS AND COMPOUNDS

卷:629

Article

Konkova, T.¹  Mironov, S.²  Korznikov, A.^1,3  Korznikova, G.¹  Myshlyaev, M. M.⁴  Semiatin, S. L.⁵ 

[1] Rssian Acad Sci, Inst Met Superplast Problems, Ufa 450001, Russia

[2] Tohoku Univ, Grad Sch Engn, Dept Mat Proc, Sendai, Miyagi 9808579, Japan

[3] Natl Res Tomsk State Univ, Tomsk 634050, Russia

[4] Russian Acad Sci, Baikov Inst Met & Mat Sci, Moscow 119991, Russia

[5] AFRL RXCM, Air Force Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA

关键词: Nanostructured materials;    Nanofabrication;    Grain boundaries;    Microstructure;    Scanning electron microscopy;   

DOI  :  10.1016/j.jallcom.2014.12.241

来源: Elsevier

【 摘 要 】

High-resolution electron backscatter diffraction (EBSD) was used to study grain structure development during cryogenic rolling of Cu-29.5Zn brass. Microstructure evolution was found to be broadly similar to that occurring during rolling at room temperature. Specifically, favorably-oriented grains (Copper {112} < 111 > and S {123} < 634 > experienced profuse deformation twinning followed by extensive shear banding. This eventually produced an ultrafine structure with a mean grain size of similar to 0.2 mu m. On the other hand, grains with crystallographic orientations close to Brass {110} < 112 > and Goss {110} < 100 > were found to be stable against twinning/shear banding and thus showed no significant grain refinement. As a result, the final structure developed in heavily-rolled material was distinctly inhomogeneous consisting of mm-scale remnants of original grains with poorly developed substructure and ultra-fine grain domains. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

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