论文摘要
The GH4169 superalloy with different content of δ-Ni3Nb phase was welded by tungsten inert gas welding.A detailed study of microstructure and hardness of heat-affected zone（HAZ） was performed in both as-welded and aged state.The results show that the precipitation of δ phase, especially the intergranular δ phase, can lead to the enrichment of Nb and Mo elements, which promote the formation of γ/Laves eutectic constituent at grain boundaries in HAZ.In as-welded state, the hardness decreases first and then increases（exhibiting a "V" shape） with distance away from fusion line in HAZ, which is governed by grain size.After aging treatment, however, the γ″ phase plays a key role in hardness and leads to the " Λ " shape profiles of hardness in HAZ.
论文目录
文章来源
类型: 期刊论文
作者: Tian-Fu Wang,Xin-Jie Di,Cheng-Ning Li,Jia-Mei Wang,Dong-Po Wang
来源: Acta Metallurgica Sinica(English Letters) 2019年08期
年度: 2019
分类: 工程科技Ⅰ辑
专业: 金属学及金属工艺
单位: School of Materials Science and Engineering, Tianjin University,Tianjin Key Laboratory of Advanced Joining Technology
基金: financially supported by the National Natural Science Foundation of China (No.51774213),the Regional Demonstration Project of Marine Economic Innovation and Development (No.BHSF2017-10)
分类号: TG132.3;TG444.74
页码: 1041-1052
总页数: 12
文件大小: 12421K
下载量: 43