原位内生颗粒增强TiB_2/7055铝基复合材料的组织  

Microstructure of in-situ TiB_2 particle reinforced 7055 aluminum alloy matrix composites

作　　者：郝世明[1,2] 毛建伟[3] 谢敬佩[4,2] 

机构地区：[1]河南科技大学物理工程学院,河南洛阳471023 [2]有色金属共性技术河南省协同创新中心,河南洛阳471023 [3]上海交通大学金属基复合材料国家重点实验室,上海200240 [4]河南科技大学材料与工程学院,河南洛阳471023

出　　处：《材料热处理学报》2015年第5期29-34,共6页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51371077)

摘　　要：对原位内生Ti B2/7055铝基复合材料的微观组织和热处理特性进行了研究。结果表明,原位内生的Ti B2颗粒在基体中弥散分布,与基体界面结合良好。Ti B2/7055复合材料具有显著的时效强化行为,增强相Ti B2颗粒促进复合材料的时效析出行为,缩短硬度达到峰值的时间,热处理后硬度和抗拉强度等性能明显提高。确定了12 mass%Ti B2/7055复合材料最佳热处理制度为460℃固溶60 min,120℃时效20 h。Microstructure and heat treatments of in-situ Ti B2 particle reinforced 7055 aluminum alloy matrix composites were studied. The results show that the in-situ Ti B2 reinforced particles distribute dispersively in the matrix and the interface between the Ti B2 particles and the matrix binds well. The Ti B2/7055 composites exhibit the remarkable aging strengthening effects. The Ti B2 particles promote the aging precipitation of alloying elements in the composites and their hardness,tensile strength can be improved obviously after heat treatment.The optimal heat treatment process of 12 mass% Ti B2/7055 composites is determined based on the experiments,which is solution treating at 460 ℃ for 60 min and then aging at 120 ℃ for 20 h.

关 键 词：7055铝合金 铝基复合材料 原位合成 TIB2 热处理 

分 类 号：TB333[一般工业技术—材料科学与工程]