摘要
利用搅拌铸造法制备了体积分数为2%的Mg2B2O5w/6061Al复合材料,对复合材料进行热挤压试验,研究了复合材料热挤压变形前后的显微组织及力学性能。结果表明:热挤压变形后,材料内部显微孔洞等铸造缺陷明显消除,组织沿挤压方向流线排列并呈现出明显的带状特征,晶须分布更加均匀且沿挤压方向排布;复合材料的强度和塑性显著提高;热挤压变形有利于改善晶须与基体合金的界面结合,从而提高了材料的力学性能。
Mg2B2OsJ6061A1 composites （2vol.%Mg2B2Osw） was prepared by stirring casting and hot extrusion process. The microstructure and mechanical properties of the composites before and after hot extrusion were investigated. The results indicate that the extrusion process may make the distribution of Mg2B2Osw whisker more homogeneous and the arrangement of Mg2BEOsw whisker in the direction of extrusion more orientated and orderly, so the feature of banded structure is presented. The process may eliminate the micro-porosity in the composite and increase the strength and plasticity of the composites. Hot extrusion deformation is helpful to improve the bonding of MgEB2OsJ6061Al interface and the mechanical properties of materials.
出处
《铸造技术》
CAS
北大核心
2013年第9期1105-1107,共3页
Foundry Technology
基金
"973"计划前期专项资助项目(2011CB612201)
关键词
搅拌铸造
铝基复合材料
显微组织
热挤压
stirring casting
aluminum matrix composite materials
microstructure
hot extrusion
