本文利用熔剂保护法制备了Mg-5Yb-0.5Zr合金,并进行了热挤压和热处理,对合金在各种加工状态下的相结构、显微组织和力学性能进行了试验和测试.结果表明,合金由α-Mg和Mg2Yb相组成,铸态组织中的Mg2Yb相聚集在晶界,并在热挤压过程中被破碎起到限制再结晶和弥散强化的作用;合金经热处理后有一定的时效强化效应,析出相为共轭生长的短棒状Mg2Yb颗粒.合金在挤压态的强度最高,T5态热处理可得到良好的综合力学性能.
参考文献
| [1] | B.L.Mordike;T.Ebert .Magnesium Propcrties-applications-potential[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2001,302:37-42. |
| [2] | 罗治平;张少卿 .稀土镁合金的研究[J].材料科学与工程,1993,11(04):38-41. |
| [3] | 于文斌,刘志义,程南璞,吴安如.稀土变形镁合金的研究和开发[J].材料导报,2006(11):65-68,72. |
| [4] | Nie J F .Preface to viewpoint set on:phase transformations and deformation in magnesium alloys[J].Scripta Materialia,2003,48:981-985. |
| [5] | Xu D K;Liu L;Xu Y B et al.The effect of precipitates on the mechanical properties of ZK60-Y alloy[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2006,420:322. |
| [6] | Zhang Y;Zeng X Q;Liu L F et al.Effects of yttrium on microstrueture and mechanical properties of hot-extruded Mg-Zn-Y-Zr alloys[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2004,373:320-326. |
| [7] | 周海涛,曾小勤,刘文法,丁文江,朱燕萍.稀土铈对AZ61变形镁合金组织和力学性能的影响[J].中国有色金属学报,2004(01):99-104. |
| [8] | Zeng X Q;Zhang Y;Lu C et al.Precipitation behavior and mechanical properties of a Mg-Zn-Y-Zr alloy processed by thermo-mechanical treatment[J].Journal of Alloys and Compounds,2005,395:213-217. |
| [9] | Wei Wu;Yue Wang;Xia Zeng;Li Jia Chen;Zheng Liu .Effect of neodymium on mechanical behavior of Mg-Zn-Zr magnesium alloy[J].Journal of Materials Science Letters,2003(6):445-447. |
| [10] | 罗治平.热处理对Mg-Nd-Zr挤压合金性能与组织的影响[J].中国稀土学报,1994(02):183. |
| [11] | T. Honma;T. Ohkubo;S. Kamado .Effect of Zn additions on the age-hardening of Mg-2.0Gd-l.2Y-0.2Zr alloys[J].Acta materialia,2007(12):4137-4150. |
| [12] | 于文斌,刘志义,程南璞,何洪.Mg-xYb和Mg-xYb-0.4Zr合金的铸态组织及力学性能[J].金属学报,2007(06):612-618. |
| [13] | Massalski T B;Murray J L;Bennett L H.Binary Alloy Phase Diagrams[M].Ohio:ASM,1988 |
| [14] | Friedrich E H;Mordike B L.Magnesium Technology[M].Heidelberg:Springer-Verlag,2006 |
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