摘要:

AbstractPlane stress yield loci are derived from an extensive bank of textural data which covers a range of fcc metals and alloys subjected to a wide range of thermomechanical processing operations. Results are given in terms of a parameter Y which describes the shape of the yield locus and corresponds to the ratio of the yield stress at balanced biaxial tension to the yield stress at pure shear. It is found that the yield loci indicative of good formability occur in metal sheets in which textural components are carefully balanced. For high stacking fault energy metals this corresponds to a mixture of cube texture with retained rolling texture components. For low stacking fault energy metals, the mixture is in the form of the brass annealing texture supplemented by components of grain growth texture. Improvements which can be gained in the formability with the latter texture are quite significant, while the former texture is capable only of restoring the formability to isotropic levels.MST/869

ISSN:0267-0836    

DOI:10.1179/mst.1989.5.2.186

出版商:Taylor&Francis    

年代:1989

数据来源: Taylor

摘要:

AbstractExperiments have been carried out using two high strength commercial Al–Mg alloys (AA 5056 and AA 5083) with the aim of understanding the structural developments that occur in the deformation zone during rolling as a function of temperature and reduction per pass. From optical and transmission electron micrographs of samples taken from various locations of the deformation zone, it was found that stabilisation of the substructure is dependent on the exit temperature, pass reduction, and the individual grain orientation to the stress axis. The results of microscopy were supplemented by microhardness measurements along the length of the deformation zone, from which it was found that, even when plane strain conditions obtain (width/thickness>5 : 1), after deformation differing properties were exhibited by the plate edge compared with the plate centre.MST/908

ISSN:0267-0836    

DOI:10.1179/mst.1989.5.2.194

出版商:Taylor&Francis    

年代:1989

数据来源: Taylor

ISSN:0267-0836    

DOI:10.1179/mst.1989.5.2.202

出版商:Taylor&Francis    

年代:1989

数据来源: Taylor