航空材料学报2012，Vol.32Issue(4)：32-37,6.DOI:10.3969/j.issn.1005-5053.2012.4.006
水下搅拌摩擦加工对AZ91镁合金组织和力学性能的影响
Microstructure and Mechanical Properties of Submerged Friction Stir Processed AZ91 Magnesium Alloy
摘要
Abstract
Normal and submerged friction stir processing ( SFSP) were applied to prepare fine-grained AZ91 alloy, and microstructure and mechanical properties of the processed materials were investigated. The results show that owing to cooling water, the stir zone ( SZ) area of SFSP is smaller than that of normal FSP, and microstructures are significantly refined, which the average grain sizes were 1.9μm and 3.5μm respectively. The fibrous structure in the thermal-mechanically affected zone (TMAZ) , but the average grain size of SFSP was finer. Microstructure of the normal FSP coarsened in the heat affected zone ( HAZ) , while the grain size of the SFSP plate was almost equal to that of the base material ( BM ). The second phase β-Mg17 Al12 of both two processes were changed from network into particles in SZ. The hardness, tensile strength and elongation of SFSP material were higher than those of normal FSP.关键词
水下搅拌摩擦加工/AZ91镁合金/微观组织/力学性能Key words
submerged friction stir process/ AZ91 magnesium alloy/ microstructure/ mechanical property分类
矿业与冶金引用本文复制引用
柴方,张大童,张文,邱诚..水下搅拌摩擦加工对AZ91镁合金组织和力学性能的影响[J].航空材料学报,2012,32(4):32-37,6.基金项目
广州市科技支撑计划资助项目(2009Z2-D811) （2009Z2-D811）
中央高校基金科研业务费专项资金资助项目(2009ZM0264) （2009ZM0264）
