Al基和Al-6Si基闭孔泡沫铝的动态压缩性能-中国有色金属学报.PDF

第 17 卷第 5 期 中国有色金属学报 2007 年 5 月 Vol.17 No.5 The Chinese Journal of Nonferrous Metals May 2007 文章编号：1004-0609(2007)05-0704-06 Al 基和 Al-6Si 基闭孔泡沫铝的动态压缩性能 尉海军，李 兵，郭志强，姚广春 (东北大学 材料与冶金学院，教育部材料先进制备技术工程研究中心，沈阳 110004) 摘 要：利用熔体转移发泡法制备了不同密度的 Al 基和 Al-6Si 基闭孔泡沫铝(CCAF)，探讨了 CCAF 基体的微观 形貌及物相组成，对其动态压缩性能进行了研究。结果表明：Al 基 CCAF 基体微观形貌较单一，基本上是小块状 (Al CaTi ) ；而 Al-6Si 基 CCAF 基体微观形貌复杂，主要呈大片状(Al Si 和 CaAl Si ) 、长针状(Al Ti)和小白 20 2 3.21 0.47 2 3 3 点(Al O ) 。动态压缩结果显示：Al 基 CCAF 压缩应力—应变曲线较平缓，断裂层有明显的材料撕裂痕迹；而 Al-6Si 2 3 基 CCAF 压缩应力—应变曲线不光滑，个别曲线波动较大，断裂层出现显著的脆性材料断裂特征；随着相对密度 的增加，Al 基和 Al-6Si 基 CCAF 屈服强度(σ )和表观弹性模量(E )整体趋势都在增加。 pl 0.2 关键词：闭孔泡沫铝；动态压缩；相对密度；屈服强度；表观弹性模量 中图分类号：TG 146.21 文献标识码：A Dynamic compressive property of closed-cell aluminum foam with Al matrix and Al-6Si matrix YU Hai-jun, LI Bing, GUO Zhi-qiang, YAO Guang-chun (Engineering and Researching Centre of Advanced Preparation Technology of Materials, Ministry of Education, School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China) Abstracts: Closed-cell aluminum foam (CCAF) with Al matrix and Al-6Si matrix was prepared by method of molten body transitional foaming process, the metallography of matrix was discussed, and its dynamic compressive property was researched. The results show that the metallography of CCAF with Al matrix is simple, basically existing as small pi