采用400rpm 100mm/min,800rpm 100mm/min,800rpm 200mm/min三种工艺参数对铸态AZ91镁合金进行搅拌摩擦加工(FSP)处理,并对合金加工前后的显微组织和拉伸性能及微观断裂机制进行分析.结果表明,经800rpm 100mm/min工艺FSP处理后,合金的显微组织明显细化,延伸率和抗拉强度显著提高,综合拉伸性能最好,且拉伸断口主要表现为韧性断裂的特征.这主要是由于在FSP过程中合金发生动态再结晶,使合金晶粒显著细化及粗大β相的溶解和破碎所致.
参考文献
[1] | Ma ZY;Sharma SR;Mishra RS .Effect of multiple-pass friction stir processing on microstructure and tensile properties of a cast aluminum-silicon alloy[J].Scripta materialia,2006(9):1623-1626. |
[2] | Su JQ;Nelson TW;Sterling CJ .Microstructure evolution during FSW/FSP of high strength aluminum alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):277-286. |
[3] | Ma ZY;Sharma SR;Mishra RS .Effect of friction stir processing on the microstructure of cast A356 aluminum[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1-2):269-278. |
[4] | Fei-Yi Hung;Chien-Chih Shin;Li-Hui Chen .Microstructures and high temperature mechanical properties of friction stirred AZ31-Mg alloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2007(1/2):106-114. |
[5] | ESPARZA J A;DAVIS W C .Friction stir of magnesium alloy AZ31B[J].Journal of Materials Science Letters,2002,21:917-920. |
[6] | 刘生发,黄尚宇,徐萍.Ce对AZ91镁合金铸态组织细化的影响[J].金属学报,2006(04):443-448. |
[7] | Yuanyuan Li,Datong Zhang,Ying Liu,Yan Long,Weiping Chen.Microstructure and tensile behavior of hot extruded AZ91 alloys at room temperature[J].北京科技大学学报(英文版),2002(05):352-355. |
[8] | MAHONEY M W;RHODES C G;FLINTOFF J G et al.Properties of Friction Stir Welded 7075 T651 Aluminum[J].Metallurgical and Materials Transactions,1998,29A:1955-1964. |
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