Microstructures and mechanical properties of friction stir processed Mge2.0Nde0.3Zne1.0Zr magnesium alloy

作     者：F.Y.Zheng Y.J.Wu L.M.Peng X.W.Li P.H.Fu W.J.Ding 

作者机构：National Engineering Research Center of Light Alloy Net FormingShanghai Jiao Tong University800 Dongchuan RoadShanghai 200240PR China The State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong University800 Dongchuan RoadShanghai 200240PR China 

出 版 物：《Journal of Magnesium and Alloys》 (镁合金学报（英文）)

年 卷 期：2013年第1卷第2期

页      面：122-127页

学科分类：0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：This work is supported by Shanghai Phospherus Program(Project No.11QH1401200) Program for New Century Excellent Talents in University by Ministry of Education of China(Project No.NCET-11-0329) 

主　　题：Mg-Nd-Zn-Zr alloy Friction stir processing Grain refinement Dynamic recrystallization 

摘      要：The effect of Friction stir process(FSP)parameters on the microstructure and mechanical properties of an extruded Mge2.0Nde0.3Zne1.0Zr(wt.%)alloy was investigated in this *** alloy was friction stir processed with different passes:single-pass,three-pass and five-pass,under a tool rotation rate of 800μm and a traverse speed of 200 mm min^(-1).FSP results in remarkable grain refinement of the extruded alloy(average grain size w3.8 mm as 3 passes)and almost complete dissolution of the Mg_(12)Nd phase in the *** the increase of pass,the average grain size in the stir zone(SZ)is decreased firstly and then *** Vikers hardness of SZs in all FSPed samples is higher than that of the parent material(PM).Tensile tests at room-temperature show that the tensile strengths of the stir zones along the FSP advancing direction are slightly lower than those of ***,the elongations are remarkably improved from 13.0%for PM to 24.5%for SZ FSPed with *** improved tensile properties are attributed to the microstructure refinement,dynamic recrystallization and dissolution of the Mg_(12)Nd phase.