热处理对喷射沉积TiC_p/ZA35合金复合材料阻尼性能的影响  

Effect of heat treatment on damping property of spray deposited TiC_p/ZA35 alloy composites

作　　者：刘敬福[1] 冯立丽[1] 岳鹏 王一[1,2] 曲迎东 

机构地区：[1]辽宁工程技术大学材料科学与工程学院,辽宁阜新123000 [2]沈阳工业大学材料科学与工程学院,辽宁沈阳110870

出　　处：《金属热处理》2017年第12期177-181,共5页Heat Treatment of Metals

基　　金：辽宁省自然科学基金(201602356)

摘　　要：研究了热处理工艺对喷射沉积原位反应TiC_p/ZA35合金复合材料组织和阻尼性能的影响。结果表明:TiC_p/ZA35合金复合材料晶粒细小,Ti C颗粒呈均匀近球形,多沿晶界分布,未发现聚集。Ti C颗粒和ZA35合金基体界面处的位错密度较高。TiC_p/ZA35合金复合材料的内耗随测试温度上升而增加,随测试频率增加而减小。在测试频率为1 Hz,温度为160℃,内耗达到0.105。经350℃×4 h+150℃×6 h热处理后,阻尼较未热处理增加16.2%。热处理后材料阻尼增加归因于位错内耗和增强相Ti C/ZA35合金基体界面内耗。Effect of heat treatment on microstructure and damping property of TiCp/ZA35 alloy composites fabricated by spray deposition in situ reaction was investigated. The results show that the TiCp/ZA35 alloy composites own fine grains and nearly spherical TiC particles distributed uniformly along the grain boundaries without obvious aggregation. The dislocation density is higher at the interface between TiC particles and ZA35 alloy matrix. The internal friction of TiCJZA35 alloy composites increases with the temperature rises, and decreases with the rise of test frequency, and goes up to 0. 105 at 160℃ and 1 Hz. The damping of TiCp/ZA35 alloy composites after 350 ℃ ×4 h ＋ 150 ℃-6 h heat treatment is 16.2% higher than that without heat treatment, which is attributable to the dislocation internal friction and the interface internal friction between reinforcement TiC and ZA35 alloy matrix.

关 键 词：原位反应 喷射沉积 热处理 TiCp/ZA35合金复合材料 阻尼性能 

分 类 号：TG174.2[金属学及工艺—金属表面处理]