铝合金半固态浆料中的卷入性缺陷  

Entrained Defects in Semi-solid Slurry of Aluminum Alloys

作　　者：郭洪民[1,3] 杨湘杰 Guo Hongmin;Yang Xiangjie(School of Physics and Materials Science,Nanchang University;School of Advanced Manufacture,Nanchang University;Key Laboratory of Near-Net Forming in Jiangxi Province)

机构地区：[1]南昌大学物理与材料学院,南昌330031 [2]江西省高性能精确成形重点实验室 [3]南昌大学先进制造学院

出　　处：《特种铸造及有色合金》2023年第6期737-740,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(52165048);江西省重大科技研发专项“揭榜挂帅”企业需求类项目(20223AAE02009)。

摘　　要：已开发的半固态浆料制备方法均会产生卷入性缺陷,浇注操作和强烈的搅拌混合是产生卷入性缺陷、降低半固态浆料品质的重要因素,半固态浆料内部的卷入性缺陷主要表现为气孔、缩孔、双层膜和气泡轨迹等。开发无卷入性缺陷半固态浆料的制备方法和技术是研究和发展流变铸造首要解决的关键问题。促进卷入性缺陷钝化是减少其危害的有效途径,卷入性缺陷闭合与焊合行为机理研究将丰富铸造领域卷入性缺陷的调控理论。All methods developed to prepare semi-solid slurry can take entrained defects,and pouring operation and intense stirring or mixing are main factors for entrained defects formation.Entrained defects in semi-solid slurry present in form of gas porosity,shrinkage porosity,bifilm and bubble trail.Developed preparation method ofsemi-solid slurry without entrained defects is the key for rheo-casting processes.Decrease of entrained defects is an effective way to reduce negative effects from entrained defects,and investigations on closing mechanisms and bonding mechanisms can enrich the controlling theories for entrained defects in casting fields.

关 键 词：铝合金 流变铸造 半固态浆料 卷入性缺陷 力学性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG249.26[金属学及工艺—金属材料]