【摘要】 研究了喷射成形大尺寸La₆₂Al_15.7（Cu,Ni）_22.3非晶合金在过冷液相区内的塑性变形行为.结果表明,随加热温度的增加和应变速率的减小,该非晶合金由非稳态变形向单一稳态变形行为转变.当应变速率为5×10^-3s^-1,温度为443 K和挤压比为6.25时,喷射成形La₆₂Al_15.7（Cu,Ni）_22.3非晶合金样品的密度由挤压前的5.723增加到挤压后的5.924 g/cm³,达到了同成分吸铸态非晶合金密度（6.134 g/cm³）的96.6%.挤压后非晶合金样品依然保持完全非晶态.更多还原

【Abstract】 A large sized La₆₂Al_15.7（Cu,Ni）_22.3amorphous alloy was produced by spray deposition, and its compressive deformation behavior in supercooled region was investigated.It is found that both the strain rate and test temperature significantly affect the stress-strain behavior of the amorphous alloy in the supercooled liquid region.The deformation behavior is characterized by a transformation from unsteady-state flow to steady-state flow with the decrease of strain rate or increase of heating temperature in the supercooled region.After hot extrusion at 443 K,the alloy is still amorphous and its density（5.924 g/cm³）is 96.6%of the suction-cast amorphous alloy with the same component（6.134 g/cm³）when the reduction ratio,strain rate and heating temperature are adopted as 6.25,5×10^-3s^-1and 443 K,respectively.更多还原