Residual Stresses and Nanoindentation Testing of Films and Coatings by Haidou Wang Lina Zhu & Binshi Xu

Author:Haidou Wang, Lina Zhu & Binshi Xu
Language: eng
Format: epub
Publisher: Springer Singapore, Singapore

Scanning speed (mm s−1)

Laser beam diameter (mm)

Laser power (W)

Powder feed rate (g min−1)

Track width (mm)

Track thickness (mm)

Overlapping rate (%)

3

3

3500

12.8

2.4

1

30

Fig. 5.2Macroscopic morphology of the Fe90 cladding coating and the image after detection

5.1.2 Microstructures of Fe-Based Laser Cladding Coatings

The morphologies, element analysis, and the phase constitution of the cladding coating were examined using scanning electron spectroscopy equipped with energy-dispersive X-ray spectroscopy, X-ray diffractometer, and transmission electron microscopy.

Figure 5.3 shows the cross-sectional morphologies of the laser cladding coating. The cladding coating with a thickness of 1 mm presents a uniform appearance, and no crack or defect is observed. It is seen from Fig. 5.3b that there is a clear bright band between the cladding layer and substrate, indicating that a good metallurgical bonding exists between the cladding layer and the substrate.

Fig. 5.3Cross-sectional morphologies of the laser cladding coating

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