Strain path and work-hardening behavior of brass

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

卷:507

Article

Sakharova, N. A.²  Fernandes, J. V.²  Vieira, M. F.¹ 

[1] Univ Porto, Fac Engn, Dept Met & Mat Engn, CEMUC, P-4200465 Oporto, Portugal

[2] Univ Coimbra, Dept Mech Engn, CEMUC, P-3030788 Coimbra, Portugal

关键词: Deformation;    Mechanical properties;    Electron microscopy;    Microstructure;   

DOI  :  10.1016/j.msea.2009.01.006

来源: Elsevier

【 摘 要 】

Plastic straining in metal forming usually includes changes of strain path, which are frequently not taken into account in the analysis of forming processes. Moreover, strain path change can significantly affect the mechanical behavior and microstructural evolution of the material. For this reason, a combination of several simple loading test sequences is an effective way to investigate the dislocation microstructure of sheet metals under such forming conditions. Pure tension and rolling strain paths and rolling-tension strain path sequences were performed on brass sheets. A study of mechanical behavior and microstructural evolution during the simple and the complex strain paths was carried out, within a wide range of strain values. The appearance and development of deformation twinning was evident. It was shown that strain path change promotes the onset of premature twinning. The work-hardening behavior is discussed in terms of the twinning and dislocation microstructure evolution, as revealed by transmission electron microscopy. (C) 2009 Elsevier B.V. All rights reserved.

【 授权许可】

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