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Investigating the solid-state diffusion at the interface of Ni/Ti laminated composite

Luo, J ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jmapro.2022.01.042
  3. Publisher: Elsevier Ltd , 2022
  4. Abstract:
  5. The fabrication of Ni/Ti laminated composite via cross accumulative roll bonding (CARB) and subsequent annealing treatment has been studied. The relationships between annealing conditions and microstructure at interfaces of Ni/Ti have been investigated by SEM, XRD, and EDS analyses. The results show that the layers were well-bonded by the CARB process, and by increasing the temperature and time of annealing treatment, the interfacial layers grew as a result of the interdiffusion of Ni and Ti atoms. The main intermetallic phases were NiTi and NiTi2, both of which obeyed linear kinetics of growth. However, the calculated activation energy of NiTi was lower than that of NiTi2, indicating the comparable growth of NiTi. Further, based upon the results of tensile tests, the ultimate strength of samples decreased as the intermetallic layers grew; the detachment of layers and the intergranular fraction of intermetallic compounds were the main fracture mechanisms. © 2022 The Society of Manufacturing Engineers
  6. Keywords:
  7. Annealing treatment ; Intergranular fracture ; Intermetallic compounds ; Annealing ; Binary alloys ; Fracture ; Growth kinetics ; Interface states ; Intermetallics ; Laminated composites ; Laminating ; Tensile testing ; Textures ; Accumulative roll bonding ; Annealing condition ; Annealing treatments ; Bonding process ; Interfacial layer ; Intermetallics compounds ; Ni atoms ; Solid-state diffusion ; XRD ; Activation energy
  8. Source: Journal of Manufacturing Processes ; Volume 75 , 2022 , Pages 670-681 ; 15266125 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S1526612522000597