Effect of cryogenic temperature and change of strain path on grain refinement during rolling of Cu–30Zn brass. (5th December 2015)

• Record Type: Journal Article
• Authors: Konkova, T.; Mironov, S.; Korznikov, A.; Korznikova, G.; Myshlyaev, M.M.; Semiatin, S.L.
• Is Part Of: Materials & design. Volume 86(2016:Oct.)
• Page Start: 913
• Page End: 921
• Publication Date: 2015-12-05
• Subjects: Cu–30Zn brass -- Grain refinement -- Cryogenic deformation -- Change of strain path -- Electron backscatter diffraction -- Grain structure; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2015.06.146
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: The effect of cryogenic temperature and change of strain path on grain refinement during the rolling of Cu–30Zn brass was determined. To this end, the material was unidirectionally rolled or cross-rolled to 90% thickness reduction at either ambient or liquid-nitrogen temperatures, and the resulting grain structures and crystallographic textures were determined via electron backscatter diffraction (EBSD) technique. In all cases, grain refinement was found to be governed primarily by twinning and shear banding. Lowering of the rolling temperature to the cryogenic range was found to provide only a minor effect. Cryogenic rolling was thus concluded to impart no practical benefit with regard to grain refinement or property improvement for this material. In contrast, a change of strain path via cross rolling was shown to enhance twinning and shear banding and thus to promote the formation of a relatively homogeneous ultrafine-grain microstructure. Graphical abstract: Highlights: In all studied cases, grain refinement is governed by twinning and shear banding. Cryogenic rolling conditions provide only minor grain-refinement effect. Cross rolling enhances twinning and shear banding and promotes grain refinement.