通过金相观测、断口扫描和力学性能测试等实验,研究了宽幅AZ31B镁合金铸轧板的组织分布,及其对板带边裂和力学性能的影响.结果表明:AZ31B镁合金铸轧板的组织主要由a-Mg基体、析出相β-Mg17Al12相及α+β离异共晶组成,呈树枝晶形貌；β-Mg17Al12相在AZ31B镁合金铸轧板坯的表层及边部主要分布于晶界处且密度较大、构成网状,而在板坯的心部和中部呈球状弥散于α-Mg基体中,构成层片状；在板坯边部枝晶间低熔点的共晶相及晶界上的β-Mg17Al12相易成为裂纹源,并沿晶向外扩展,是铸轧过程中产生裂纹的主要原因；试样拉伸断口呈脆性解理断裂的特征,其力学性能呈明显的各向异性.
参考文献
| [1] | E.Aghion,B.Bronfin,Magnesium alloys development to towards the 21st century,Materials Science Forum,350(351),19(2000) |
| [2] | Hongmei Chen,S.B.Kang,Huashun Yu,Microstructure and mechanical properties of Mg-4.5Al-1.0Zn alloy sheets produced by twin roll casting and sequential warm rolling,Materials Science Engineering,492(1/2),317(2008) |
| [3] | S.S.Park,T.Baeg,I.Kangdi,H.Jungi,S.Shink,N.J.Kim,Microstructure and tensile properties of twin-roll cast Mg-Zn-Mn-Al alloys,Seripta Materialia,57(9),793(2007) |
| [4] | P.Waurzyniak,Advanced materials in automotive:Newer steels,aluminum,magnesium,and other materials lead to more light-weight,economical vehicles,Manufacturing Engineering,143(3),65(2009) |
| [5] | C.Blawert,N.Hort,K.U.Kainer,Automotive applications of magnesium and its alloys,Transactions of the Indian Institute of Metals,57(4),397(2004) |
| [6] | B.L.Mordike,T.Ebert,Magnesium properties-application spotential,Materials Science and Engineering,302(A),37 (2001) |
| [7] | LI Yonglin,LI Zheng,DI Hongshuang,LIU Xianghua,WANG Guodong,The study on new technology of AZ31 magnesium alloy by strip casting,Light Alloy Fabrication Technology,37(7),15(2004)(李永林,李正,邸红双,刘相华,王国栋,AZ31镁合金薄带直接铸轧新技术,轻合金加工技术,37(7),15(2004)) |
| [8] | WANG Guangshan,DI Hongshuang,HUANG Feng,Experimental study on vertial twin-roll casting for preparing AZ31 magnesium alloy strip,Forging and Stamping Technology,34(4),52(2009)(王广山,邸洪双,黄锋,双辊铸轧镁合金热塑性和热轧工艺研究,热加工工艺,34(4),52(2009)) |
| [9] | J.Kim,H.Ryou,D.Kim,D.Kim,W.Lee,S.Hong,K.Chung,Constitutive law for AZ31B Mg alloy sheets and finite element simulation for three-point bending,International Journal of Mechanical Sciences,50(10-11),1510(2008) |
| [10] | TANG Ning,WANG Mingpu,LOU Huafen,LI Zhou,GUO Mingxing,LEI Qian,Phases analysis of twin-roll casting AZ3 1 M g alloy plate blank,The Chinese Journal of Nonferrous Metals,19(3),433(2009)(唐宁,汪明朴,娄花芬,李周,双辊铸轧AZ31镁合金板坯的物相分析,中国有色金属学报,19(3),433(2009)) |
| [11] | GAO Qiang,The New Non-Ferrous Metals Metallographic Atlas (BeiJing,China Metallurgical Industry Press,2005) p.974(高强,有色金属图谱(北京,中国有色工业出版社,2005)p.974) |
| [12] | PAN Fusheng,HAN Enhou,High Performance Magnesium Alloys and Processing Technology(Beijing,Science Press,2007) p.59(潘复生,韩恩厚,高性能变形镁合金及加工技术(北京,科学出版社,2007) p.59) |
| [13] | Q.Dai,D.Zhang,X.Chen,On the anisotropic deformationof AZ31 Mg alloy under compression,Materials & Design,32(10),5004(2011) |
| [14] | W.J.Jim,J.B.Lee,W.Y.Klm,H.T.Jeong,H.G.Jeong,Microstructure and mechanical propertics of Mg-Al-Zn alloy sheets severely deformed by asymmetrical rolling,Scripta Materialia,56(32),309(2007) |
| [15] | Y.N.Wang,J.C.Huan,Texture analysis in hexagonal material,Materials Chemistry and Physics,81(1),11(2003) |
| [16] | A.S.Khan,A.Pandey,T.G.Herold,R.K.Mishra,Mechanical response and texture evolution of AZ31 alloy at large strains for different strain rates and temperatures,International Journal of Plasticity,27(5),688(2011) |
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