Effect of Multiaxial Forging on Structure Evolution and Mechanical Properties of Oxygen Free Copper

摘要：

Evolution of micro-and macrostructure and mechanical properties of oxygen-free copper after MAF at room temperature was studied. MAF included sequential upsetting and drawing with total cycles number equal to 20 and maximum strain ≈50. MAF causes the formation of homogenous UFG structure with a grain/subgrain size of 0.3 μm and fraction of high angle boundaries 50%, but macrostructure is heterogeneous. Rough shear macrobands areas of different orientation are observed. MAF results in significant strengthening from 280 MPa to 445 MPa, but samples remain very ductile even after large strains. Mechanisms of UFG structure formations during MAF are discussed.

作者: G.A.Salishchev N.D.Stepanov A.V.Kuznetsov S.V.Zherebtsov O.R.Valiakhmetov A.A.Kuznetsov S.V.Dobatkin

作者单位: Laboratory of Bulk Nanostructured Materials,Belgorod State University,85 Pobeda Str.,Belgorod,803015 Institute for Metals Superplasticity Problems,Russian Academy of Science,39 Khalturina Str.,Ufa,4500 A.A.Baikov Institute of Metallurgy and Materials Science,Russian Academy of Sciences,49Leninskii pr.

会议类型: 国际会议

会议名称: 5th International Conference on Nanomaterials by Severe Plastic Deformation(第五届剧烈塑性变形纳米材料国际会议)

会议地点: 南京

会议语种:英文

页码: 289-294

在线出版日期: 2011-03-01（万方平台首次上网日期，不代表论文的发表时间）