采用光学显微镜(OM)、扫描电镜(SEM)、X射线衍射仪(XRD)和室温拉伸试验研究了稀土Nd对热挤压Mg-5 0Y-xNd-0.6Zr(x=0,1.0,2.6,4.2,质量分数/ %,下同)合金微观组织和力学性能的影响.结果表明:随着Nd加入量增大,挤压合金中带状分布的β和Mg24Y5相颗粒增多,促进了动态再结晶的形核,提高了再结晶体积分数,其平均晶粒尺寸由4.5μm细化到2.6μm.挤压合金的抗拉强度和屈服强度随着Nd加入量增大而升高,最高分别达到303MPa和262MPa,而延伸率和断面收缩率随Nd加入量增大而降低,其值分别从24.7%和39.9%降低到12%和16.7%.Nd加入量为2.6%时,挤压合金具有较好的综合性能.
参考文献
| [1] | MORDIKE B L;EBERT T .Magnesium properties-application-potential[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2001,302(01):37-45. |
| [2] | Kojima Y.; .Platform Science and Technology for Advanced Magnesium Alloys[J].Materials Science Forum,2000(0):3-18. |
| [3] | Mohri T.;Saito N.;Nakamura M.;Mabuchi M. .Microstructure and mechanical properties of a Mg-4Y-3RE alloy processed by thermo-mechanical treatment[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1998(2):287-294. |
| [4] | WANG J G;HSIUNG L M;NIEH T G et al.Creep of a heat treated Mg-4Y-3RE alloy[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2001,315(1-2):81-88. |
| [5] | Hiroyuki Watanabe;Toshiji Mukai;Koichi Ishikawa .Superplasticity of a Particle-Strengthened WE43 Magnesium Alloy[J].Materials transactions,2001(1):157-162. |
| [6] | Xibo Liu;Rongshi Chen;Enhou Han .High temperature deformations of Mg–Y–Nd alloys fabricated by different routes[J].Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing,2008(1/2):326-332. |
| [7] | 唐伟能,陈荣石,韩恩厚.Mg-Y-Nd-Zr合金的高温变形行为与热加工性能[J].金属学报,2006(10):1096-1100. |
| [8] | RZYCHO N T;KIE(L)BUS A .Microstructure of WE43 casting magnesium alloys[J].Journal of Achievements in Materials and Manufacturing Engineering,2007,21(01):31-34. |
| [9] | F.G. Meng;J. Wang;H.S. Liu .Experimental investigation and thermodynamic calculation of phase relations in the Mg-Nd-Y ternary system[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(0):266-273. |
| [10] | 陈振华.变形镁合金[M].北京:化学工业出版社,2005 |
| [11] | T. Al-Samman;G. Gottstein .Dynamic recrystallization during high temperature deformation of magnesium[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):411-420. |
| [12] | ION S E;HUMPHREYS F J;WHITE S H .Dynamic recrystallisation and the development of microstructure during the high temperature deformation of magnesium[J].Acta Metallurgica,1982,30(10):1909-1919. |
| [13] | Lussana D;Massazza M;Riontino G .A DSC study of precipitation hardening in a WE43 Mg alloy[J].Journal of thermal analysis and calorimetry,2008(1):223-225. |
| [14] | A. GALIYEV;R. KAIBYSHEV;G. GOTTSTEIN .CORRELATION OF PLASTIC DEFORMATION AND DYNAMIC RECRYSTALLIZATION IN MAGNESIUM ALLOY ZK60[J].Acta materialia,2001(7):1199-1207. |
| [15] | 张津;章宗和.镁合金及应用[M].北京:化学工业出版社,2004 |
| [16] | M. Zhang;W.-Z. Zhang .Interpretation of the orientation relationship and habit plane orientation of the equilibrium p-phase in an Mg-Y-Nd alloy[J].Scripta materialia,2008(7):706-709. |
| [17] | 潘金生;仝健民;田明波.材料科学基础[M].北京:清华大学出版社,1998 |
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