航空材料学报2011，Vol.31Issue(2)：89-94,6.DOI:10.3969/j.issn.1005-5053.2011.2.017
A206/1%Al2O3铝基纳米复合材料的热裂行为
Hot Cracking Behavior of A206/1％ Al2O3 Aluminum Base Nanocomposite
摘要
Abstract
A206 aluminum alloy is rarely used in critical applications because of its high propensity for hot cracking. A206/1％ Al2 O3 nanocomposite was prepared with ultrasonic dispersion method. The hot cracking susceptibility (HCS) was evaluated using constrained rod casting in a steel mold. And microstructure of the alloys was analyzed by Optical Microscopy(OM) and Scanning Electron Microscopy( SEM ). It was observed that the grain structure of α-Al in A206 alloy was changed from large dendritic crystal to small equiaxed one and the grain size was decreased from 164 μm to 26 μm with addition of Al2O3 nanoparticles. In addition, large number of flakelike (Fe, Mn)-rich intermediate phases were formed and coarse CuAl2 phases were eliminated in A206/1％ Al2 O3 aluminum composite, which significantly decreases its HCS.关键词
热裂行为/A206铝合金/纳米复合材料/晶粒细化Key words
hot cracking behavior/ A206 aluminum alloy/ nanocomposite/ grain refinement分类
通用工业技术引用本文复制引用
李克,王倩,周耐根,高挺..A206/1%Al2O3铝基纳米复合材料的热裂行为[J].航空材料学报,2011,31(2):89-94,6.基金项目
国家自然科学基金(50465003) （50465003）
