High pressure torsioning of Cu-9Fe-1.2X(X =Co,Ni,Ag) microcomposites and their microstructural and mechanical evolution
In this study, strength of Cu-9Fe-1.2X (X 5 Ag or Cr) microcomposite disks obtained HPT(high pressure torsioning) have been investigated.The dendrite arms were aligned along the drawing direction and elongated into filaments.The filament spacings were found to small in Cu9Fe-1.2Ag compared to those of other microcomposites.The ultimate tensile strength of the Cu-FeAg microcomposites were higher than those of Cu-Fe-Co and Cu-Fe-Ni microcomposites,suggesting the strengthening of the matrix is more effective than the strengthening of the filaments in strengthening the microcomposites.The strength of Cu-Fe-Xi microcomposites increased more rapidly when the finer microstructure was developed by the plastic flow and refinement of filaments by the effect of strong Cu matrix strengthened by Ag atoms.With increase of strain up to 7 rotations, the second phase lamella was observed to be fragmented by HPT rotations and small second phase particles were observed.
Hybrid alloy Cu-Fe-Co/Co-Fe-Ni/Co-Fe-Ag High Pressure Torsion1
Woo Min Choi Sun Ig Hong
Chungnam National University Deajeon,Korea
国际会议
香港
英文
87-90
2013-06-25（万方平台首次上网日期，不代表论文的发表时间）