钛镍合金
金属间化合物
材料科学
冶金
微观结构
共晶体系
压痕硬度
脆性
合金
形状记忆合金
基质(水族馆)
枝晶(数学)
图层(电子)
沉积(地质)
复合材料
地质学
古生物学
几何学
海洋学
生物
数学
沉积物
作者
Ming Nie,Yuan Zhou,Ping Jiang,X.R. Li,Dongdong Zhu,Z.H. Shan,Z.K. Chen,Zhihui Zhang
标识
DOI:10.1016/j.apsusc.2023.158107
摘要
The high brittleness intermetallic compound Fe2Ti is a key obstacle in joining stainless steel and NiTi alloys. In this study, Ni interlayer are introduced to prepare 316-Ni-NiTi multi-material specimens by direct energy deposition to reduce the excessive Fe2Ti in the system while improving the wear resistance of 316 under different loads. The presence of Ni interlayer reduces intermetallic compound Fe2Ti, resulting in the composition of 316-Ni-NiTi phase dominated by NiTi and Ni3Ti. The microstructure shows a typical dendritic morphology, in which eutectic regions existed in the NiTi layer. Both the 316/Ni interface and the Ni/NiTi interface exhibits good metallurgical bonding, the occurrence of the mutual diffusion phenomenon is confirmed by quantitative and qualitative analysis of the chemical composition of the 316-Ni-NiTi specimens. The average microhardness of the NiTi layer is 770 HV, which is 4.9 times higher than the 316, which benefiting from the intermetallic compound with high hardness generated by the introduction of the Ni interlayer. The wear weight loss of the 316-Ni-NiTi coating is less than that of the substrate at different loads, especially at a load of 60 N, which is only 29% of the substrate.
科研通智能强力驱动
Strongly Powered by AbleSci AI