CAJ | 학술논문

本文研究了钇对挤压Mg-6Gd-xY合金的显微组织、时效析出以及常温拉伸性能的影响。结果表明，添加稀土元素Y之后，合金的挤压态组织得到细化，但时效态组织细化不明显，时效后形成镁的稀土相Mg(Gd,Y)的强化相，使抗拉强度提高34~81MPa；合金的显微硬度随Y含量增加提高20HV，时效峰值的出现时间因Y的添加提前35h。
본문연구료을대제압Mg-6Gd-xY합금적현미조직、시효석출이급상온랍신성능적영향。결과표명，첨가희토원소Y지후，합금적제압태조직득도세화，단시효태조직세화불명현，시효후형성미적희토상Mg(Gd,Y)적강화상，사항랍강도제고34~81MPa；합금적현미경도수Y함량증가제고20HV，시효봉치적출현시간인Y적첨가제전35h。
Effects of yttrium on the microstructures, aging behavior and tensile property of extruded Mg-6Gd-xY magnesium alloy were investigated. The results indicate that yttrium can refine extruded microstructure of Mg-6Gd-xY magnesium alloy while grain refinement is not obvious at aging stage. RE containing phases Mg (Gd,Y) is formed with RE addition so that tensile strength can be improved from 34MPa to 81MPa at room temperature. The microhardness value was slight raised from 93HV to 113HV. The time of generation of the aging peak value advance 35 hours owning to the addition of the yttrium.