| 循环压制对喷射沉积7075/SiCp致密化的影响 |
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| 引用本文： | 袁武华,吉喆,陈振华. 循环压制对喷射沉积7075/SiCp致密化的影响[J]. 湖南大学学报(自然科学版), 2006, 33(2): 82-85 |
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| 作者姓名： | 袁武华 吉喆 陈振华 |
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| 作者单位： | 湖南大学,材料科学与工程学院,湖南,长沙,410082;湖南大学,材料科学与工程学院,湖南,长沙,410082;湖南大学,材料科学与工程学院,湖南,长沙,410082 |
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| 基金项目： | 湖南省科技厅重点项目(02GKY2004) |
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| 摘 要： | 采用循环压制工艺对多层喷射沉积大尺寸7075/SiCp复合材料(高度H>140mm)进行了致密化加工.研究了循环压制工艺对复合材料沉积坯和挤压坯密度及显微组织的影响规律,测试了复合材料的力学性能.结果表明,循环压制过程中在大的静水压力和剪切应力的共同作用下,复合材料中大部分孔洞逐渐被拉长闭合,致密化效果良好.沉积坯多次循环压制后,SiC颗粒取向平行于基体金属流动方向.挤压坯二道次压制后SiC颗粒破碎明显,分布得到改善,强度可以达到600 MPa以上.
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| 关 键 词： | 循环压制 多层喷射沉积 铝基复合材料 致密化 |
| 文章编号： | 1000-2472（2006）02-0082-04 |
| 收稿时间： | 2005-09-23 |
| 修稿时间： | 2005-09-23 |
Effects of Cyclic Pressing on Densification of Spray Formed 7075/SiCp Composite |
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| YUAN Wu-hu,JI Zhe,CHEN Zhen-hua. Effects of Cyclic Pressing on Densification of Spray Formed 7075/SiCp Composite[J]. Journal of Hunan University(Naturnal Science), 2006, 33(2): 82-85 |
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| Authors: | YUAN Wu-hu JI Zhe CHEN Zhen-hua |
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| Affiliation: | College of Material Science and Engineering, Hunan Univ, Changsha, Hunan 410082, China |
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| Abstract: | Spray formed large dimension 7075/SiCp composite was densified by cyclic pressing.Density and microstructure of the composite at different cyclic pressing pass were investigated.The tensile properties of the composite on the condition of T6 treatment were tested.The results show that most pores in the composite are elongated and closed through cyclic pressing at the joined effect of huge hydrostatic pressure and shearing stress.After cyclic pressing,SiC particles parallel to the flowing direction of the matrix in the as-deposited billet.SiC particles in extruded 7075/SiCp composite are broken and redistributed after cyclic pressing.And the tensile properties of as-pressed extruded 7075/SiCp composite are improved above 600 MPa. |
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| Keywords: | cyclic pressing multi-layer spray deposition Al matrix composite densification |
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