研究了在定向凝固条件下,在亚共晶二元Al-Li合金中获得共晶复合材料的晶体生长准则,并观察了组织形貌.结果表明,当6.5×10~5K·s·cm~(-2)≤G_L/R<11×10~5K·s·cm~(-2)时,晶体可以保持稳定的平面固-液界面生长,得到规则的共晶复合组织.二元Al-Li合金共晶组织中β相(AlLi)为棒状形貌.
The crystal growth criterion was studied to obtain eutectic composite materials for hypoeutectic Al-Li alloy. It is shown that the solid/liquid interface exhibits a stable and planar form and the ragular eutectic structure can be obtained when 6.5×10~5 K·s·cm~(-2)≤ G_L/R< 11×10~5K·s·cm~(-2). The morphology of β phase (AlLi) is bar-like in Al-Li eutectic structure.
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[8] | HagneslllTG,WyteM.Proceedingsof4thInternationalAl-LiConference,Paris,LesEditionsdePhysique,1987:6022WebsterD,HayneslllTG,FlemingRG.MetProg,1988 |
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