Fatigue Properties of Rapidly Solidified Mg-6Zn-1Y-0.6Ce-0.6Zr Alloy Processed by Reciprocating Extrusion
The ribbons of rapidly solidified Mg-6wt% Zn-lwt%Y-0.6wt%Ce-0.6wt%Zr alloy were reciprocatingly extruded and forward extruded into dense bar material. Room-temperature fatigue behavior of the alloy was tested in axial tension-tension stress condition. The fracture morphologies of the alloy after fatigue were observed by SEM. The results show that the fatigue limit is 159.2MPa with 106 cycles when the load frequency was lOHz. The S-N curve of the alloy can be regarded as Type II fatigue curve. The fatigue cracks originate from surface or subsurface of the fatigue specimens generally. The second phases or inclusions in these areas were prone to be the crack sources. The high fatigue properties of the alloy can be attributed to grain refinement strengthening and dispersion strengthening resulted from rapid solidification and reciprocating extrusion.
Zhongming Zhang Chunjie Xu Ting Wang Lin Yang
School of Materials Science and Engineering,Xian University of Technology,No.5 South Jinhua Road,Xian,Shaanxi,710048,P.R.China
国际会议
5th International Conference on Nanomaterials by Severe Plastic Deformation(第五届剧烈塑性变形纳米材料国际会议)
南京
英文
1027-1032
2011-03-01（万方平台首次上网日期，不代表论文的发表时间）