The effect of trace Ti and Y on Au-based alloys with 990 fineness has beeninvestigated systematically by means of tensile test, hardness test, scanning and transmissionelectron microscopic analyses. These experimental...The effect of trace Ti and Y on Au-based alloys with 990 fineness has beeninvestigated systematically by means of tensile test, hardness test, scanning and transmissionelectron microscopic analyses. These experimental results show that trace Ti and Y can significantlyimprove the mechanical properties of Au-based alloys with 990 fineness because Ti and Y cansignificantly refine matrix grains, and solid solution strengthening, work strengthening andprecipitation strengthening occur during mechanical heat treatment.展开更多
The mierostructure of an AuNiFeCrlnZr alloy has been studied by means of TEM,CBED. SEM and EDS. The results show that the alloy contains Au-rich solid solution, Ni-rich solid solution, and η- and -ωphases. The η-ph...The mierostructure of an AuNiFeCrlnZr alloy has been studied by means of TEM,CBED. SEM and EDS. The results show that the alloy contains Au-rich solid solution, Ni-rich solid solution, and η- and -ωphases. The η-phase containing 90at%Cr possesses an orlhorhombic .structure with a = 0.448nm. b = 1.40nm and c = 1.21nm, and space group of Pmm2 or Pmmm. The ω-phase is an fee structure with a = 0.682nin and space group of Fm3m. The ω-phase dispersed in the alloy matrix plays an important role in increasing strength and wear resistance of the alloy.展开更多
基金This work is financially supported by the Key Scientific and Technological Project of Hubei Province (No. 971P0216).
文摘The effect of trace Ti and Y on Au-based alloys with 990 fineness has beeninvestigated systematically by means of tensile test, hardness test, scanning and transmissionelectron microscopic analyses. These experimental results show that trace Ti and Y can significantlyimprove the mechanical properties of Au-based alloys with 990 fineness because Ti and Y cansignificantly refine matrix grains, and solid solution strengthening, work strengthening andprecipitation strengthening occur during mechanical heat treatment.
文摘The mierostructure of an AuNiFeCrlnZr alloy has been studied by means of TEM,CBED. SEM and EDS. The results show that the alloy contains Au-rich solid solution, Ni-rich solid solution, and η- and -ωphases. The η-phase containing 90at%Cr possesses an orlhorhombic .structure with a = 0.448nm. b = 1.40nm and c = 1.21nm, and space group of Pmm2 or Pmmm. The ω-phase is an fee structure with a = 0.682nin and space group of Fm3m. The ω-phase dispersed in the alloy matrix plays an important role in increasing strength and wear resistance of the alloy.
