材料工程2017，Vol.45Issue(1)：27-32,6.DOI:10.11868/j.issn.1001-4381.2014.001258
激光快速成形GH4169合金显微组织与力学性能
Microstructure and Mechanical Properties of Laser Melting Deposited GH4169 Superalloy
摘要
Abstract
The block samples of a Ni-based superalloy named GH4169 were prepared by laser melting deposited method using the corresponding GH4169 alloy powders,and then were heat treated with solution treatment followed by double aging.The microstructure and element segregation analysis of both as-deposited and heat treated samples were studied by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS).The microhardness as well as tensile properties at room and elevated temperatures were tested.The results indicate that the microstructure of as deposited sample mainly consists of columnar dendritic crystals that grow along with different directions.Grains are refined after solution and aging heat treatment,but remain dendritic crystals substructure inside.Compared with the as-deposited sample,the microhardness and tensile strength of the heat treated sample increase substantially,but the plasticity somewhat decreases.Nonetheless the tensile properties are superior to the standard values of forgings.The fracture surface exhibits ductile transcrystalline fracture mode.关键词
激光快速成形/GH4169/显微组织/力学性能Key words
laser melting deposition/GH4169/microstructure/mechanical property分类
矿业与冶金引用本文复制引用
杜博睿,张学军,郭绍庆,李能,孙兵兵,唐思熠..激光快速成形GH4169合金显微组织与力学性能[J].材料工程,2017,45(1):27-32,6.基金项目
北京市科技计划项目(Z141100002814002) （Z141100002814002）
