Processing and Character Evaluation of Ultrafine Grained Aluminum Alloys Containing Ceramic Particles

The purpose of The present study is to investigate The solid-state weldability of aluminum-basedRS/PM alloys and to assess the applicability of这些alloys as advanced structural materials. as afirst step,我们try here to perform friction welding (FRW) of RS/PM aluminum alloys containing 4 or 8 mass% iron。Although detailed experimental studies have been performed on the FRW of conventional aluminumalloys,almost no light has been shed upon the FRW on such PM aluminum alloys. the results are summarized asfollows.(1) The friction welding can be applied to RS/PM aluminum alloys Al- 4fe and Al- 8fe，although the ductility of the welded joint is insufficient at present .(2) under almost allconditions employed,the FRW provides a joint with the tensile strength comparable with that of base metal both at room(3) The lack of ductility is principally ascribed to The lack of ductilityformation of an intermetallic layer especially in the outer region of the interface. Partial meltingof the matrix may possibly play an important role in the above process.(4)甚至在the weldinterface, matrix does not melt as a whole in the welding process。

The purpose of the present study is to investigate the solid-state weldability of aluminum-based RS/PM alloys and to assess the applicability of these alloys as advanced structural materials. As a first step, we try here to perform friction welding (FRW) of RS/PM aluminum alloys containing 4 or 8 mass% iron. Although detailed experimental studies have been performed on the FRW of conventional aluminum alloys, almost no light has been shed upon the FRW on such PM aluminum alloys. The results are summarized as follows.(1) The friction welding can be applied to RS/PM aluminum alloys Alー4Fe and Al-8Fe, although the ductility of the welded joint is insufficient at present.(2) Under almost all conditions employed, the FRW provides a joint with the tensile strength comparable with that of base metal both at room temperature and at elevated temperatures.(3) The lack of ductility is principally ascribed to the formation of an intermetallic layer especially in the outer region of the interface. Partial melting of the matrix may possibly play an important role in the above process.(4) Even at the weld interface, the matrix does not melt as a whole in the welding process.