Cu对ZL114A合金组织与力学性能的影响
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摘要
以ZL114A合金为研究对象,探讨了Cu合金化对ZL114A微观组织和力学性能的影响。结果表明,在ZL114A合金中Cu加入量小于0.1%时,合金组织和性能无明显变化,此时Cu完全固溶在基体中。随着Cu加入量增加,合金抗拉强度呈先迅速升高再稍微下降趋势,伸长率则一直降低。在Cu加入量为0.5%时,ZL114A合金的抗拉强度达到最大值337.21 MPa,伸长率降低至3.4%。Cu含量高于0.1%(超过基体固溶极限)时,时效会析出W(Al2Mg5Si4Cu4)相,W相弥散分布在基体中,形成第二相强化,提高合金强度、降低塑性。析出第二相过程中铝基体会产生晶格畸变,提高合金的强度。
The effects of copper on the microstructure and mechanical properties of ZL114 Aaluminum alloy were investigated by optical microscope,scanning electron microscope and tensile testing experiment.The results reveal that there exist changes-absent in the microstructure or the mechanical properties with copper content less than 0.1%,which indicates that the copper is completely soluted in the matrix.As the increasing in Cu content,the tensile strength of the alloy is increased fast firstly and then declined slightly while the elongation is decreased.With the Cu content of 0.5%,the tensile strength and elongation of the alloy reach 337.21 MPa and 3.4%,respectively.Furthermore,the EDS data verifies that the improvement mechanisms of alloy is attributed to dispersed precipitation of the second phase W(Al2Mg5Si4Cu4)to form second phase strengthening effects with the content of Cu exceeding 0.1%(the limit of the matrix solid solubility),and there exists also lattice distortion being generated as the second phase to improve the tensile strength of the ZL114 Aaluminum alloy.
The effects of copper on the microstructure and mechanical properties of ZL114 Aaluminum alloy were investigated by optical microscope,scanning electron microscope and tensile testing experiment.The results reveal that there exist changes-absent in the microstructure or the mechanical properties with copper content less than 0.1%,which indicates that the copper is completely soluted in the matrix.As the increasing in Cu content,the tensile strength of the alloy is increased fast firstly and then declined slightly while the elongation is decreased.With the Cu content of 0.5%,the tensile strength and elongation of the alloy reach 337.21 MPa and 3.4%,respectively.Furthermore,the EDS data verifies that the improvement mechanisms of alloy is attributed to dispersed precipitation of the second phase W(Al2Mg5Si4Cu4)to form second phase strengthening effects with the content of Cu exceeding 0.1%(the limit of the matrix solid solubility),and there exists also lattice distortion being generated as the second phase to improve the tensile strength of the ZL114 Aaluminum alloy.
引文
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[2]GRANGER D A,SAWTELL R,KERSKER M.Effect of beryllium on the properties of ZL114Acasting[J].AFS Trans.,1984,92:579-586.
[3]王慧芳,龙思远,吴星宇,等.铁、镁含量及热处理对压铸铝硅合金组织和拉伸性能的影响[J].机械工程材料,2016,40(2):21-25.
[4]赵丽娟.高强韧铸造铝合金材料的研制[J].热加工工艺,2012,41(7):63-65.
[5]JONES G P,PEARSON J.Factor affecting grain of aluminium using Ti and B additions[J].Metallurigical Transactions,2002,B7:223-234.
[6]KAUFMAN G J,ROOY L E.Aluminum Alloy Castings:Properties,Processes and Applications[M].Materials Park,OH:ASM International,2004.
[7]杨通,张伟,陈保安,等.高强韧铸造铝合金组织与性能研究[J].西安工业大学学报,2008,28(3):240-245.
[8]贾泮江,陈邦峰.高强高韧铸造铝合金的研究现状及发展[A].大型飞机关键技术高层论坛暨中国航空学会2007年学术年会[C].深圳,2007.
[9]李元元,郭国文,罗宗强,等.高强韧铸造铝合金材料研究进展[J].特种铸造及有色合金,2000(6):45-47.
[10]陈子勇,舒群,陈玉勇.高强铸造铝铜合金显微组织与力学性能的研究[J].材料科学与工艺,2007,15(5):718-723.
[11]龚习,王恒强,付敏敏,等.航空航天用Al-Cu-Mn系高强铝合金的研究进展[J].热加工工艺,2015,44(22):6-10.
[12]杨顺田,姚军.铸造铝铜合金ZL203-S强化机理研究与应用[J].铸造技术,2016,37(1):91-94.
[13]鲍庆煌,叶兵,王其贵,等.Cu对铸造Al-Si-Cu合金组织和力学性能的影响[J].特种铸造及有色合金,2016,36(5):536-539.
[14]王东成.ZL114A合金组织与力学性能的综合优化[D].南昌:南昌航空大学,2010.