中国有色金属学报（英文版）
中國有色金屬學報（英文版）
중국유색금속학보（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2012年
6期
1322-1328
,共7页
AZ80镁合金%Nd%显微组织%力学性能
AZ80鎂閤金%Nd%顯微組織%力學性能
AZ80미합금%Nd%현미조직%역학성능
AZ80 magnesium alloy%Nd%microstructure%mechanical properties
研究添加稀土元素Nd对AZ80镁合金显微组织及力学性能的影响.结果表明:添加1.0％ Nd元素可以有效地改善AZ80合金的铸态组织,其晶粒尺寸由448 μm细化至125μm,凝固组织中出现条状的Al11Nd3相和块状的Al2Nd相,且β-Mg17Al12相显著细化,由连续网状变为不连续分布.时效过程中Nd元素的添加抑制了晶界处不连续析出相的出现,并推迟合金时效峰值的出现.在AZ80合金中添加1.0％ Nd时,合金的综合力学性能最佳,屈服强度、抗拉强度和伸长率分别为103.7 MPa、224.0 MPa和8.4％.该合金T6态的屈服强度和抗拉强度分别达到141.1和231.1 MPa.
研究添加稀土元素Nd對AZ80鎂閤金顯微組織及力學性能的影響.結果錶明:添加1.0％ Nd元素可以有效地改善AZ80閤金的鑄態組織,其晶粒呎吋由448 μm細化至125μm,凝固組織中齣現條狀的Al11Nd3相和塊狀的Al2Nd相,且β-Mg17Al12相顯著細化,由連續網狀變為不連續分佈.時效過程中Nd元素的添加抑製瞭晶界處不連續析齣相的齣現,併推遲閤金時效峰值的齣現.在AZ80閤金中添加1.0％ Nd時,閤金的綜閤力學性能最佳,屈服彊度、抗拉彊度和伸長率分彆為103.7 MPa、224.0 MPa和8.4％.該閤金T6態的屈服彊度和抗拉彊度分彆達到141.1和231.1 MPa.
연구첨가희토원소Nd대AZ80미합금현미조직급역학성능적영향.결과표명:첨가1.0％ Nd원소가이유효지개선AZ80합금적주태조직,기정립척촌유448 μm세화지125μm,응고조직중출현조상적Al11Nd3상화괴상적Al2Nd상,차β-Mg17Al12상현저세화,유련속망상변위불련속분포.시효과정중Nd원소적첨가억제료정계처불련속석출상적출현,병추지합금시효봉치적출현.재AZ80합금중첨가1.0％ Nd시,합금적종합역학성능최가,굴복강도、항랍강도화신장솔분별위103.7 MPa、224.0 MPa화8.4％.해합금T6태적굴복강도화항랍강도분별체도141.1화231.1 MPa.
The influence of Nd addition on the microstructures and mechanical properties of AZ80 magnesium alloys was investigated.The results show that the microstructure of as-cast AZ80 magnesium alloy is modified effectively with the addition of 1.0％ Nd,the grain size is decreased from 448 to 125 rn,new rod-shaped Al11Nd3 phase and block-shaped Al2Nd phase are observed in the as-cast microstructure,and β-Mg17Al12 phases are refined and become discontinuous.The addition of Nd suppresses the discontinuous precipitations at grain boundaries during aging,and the time of reaching the peak hardness is delayed.With the addition of 1.0％ Nd,the combined properties reach an optimum,the yield strength,tensile strength and elongation are 103.7MPa,224.0 MPa and 8.4％,respectively.After T6 heat treatment,the yield strength and tensile strength of the AZ80-1.0％Nd alloy are increased to 141.1 and 23 1.1 MPa,respectively.
