Effect of heat treatment on residual stress and wear behaviors of the TiNi/Ti2Ni based laser cladding composite coatings

Tao, Y.F.; Li, Jun; Lv, Yinghao; Li, Jun

doi:10.1016/j.optlastec.2017.07.029

Cited by 47 publications

(12 citation statements)

References 29 publications

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“…Therefore, its COF curve displayed the minimum fluctuation as shown in Figure 8b. In Figure 10f, many spalling holes were observed, illustrating severe brittle fracture occurred [42]. The bottom of the spalling holes was actually the fracture surface, where cracks were generated and propagated.…”

Section: Friction Coefficient and Wear Ratementioning

confidence: 98%

Synchronous Shot Peening Applied on HVOF for Improvement on Wear Resistance of Fe-based Amorphous Coating

et al. 2020

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Shot peening was used synchronously to improve Fe-based amorphous coating performance by delivering ZrO2 ceramic particles into a low-temperature region of a flame during the high velocity oxygen flame (HVOF) spray process. The coating became denser, and its hardness became higher via the new process. Moreover, the compressive residual stress was induced by shot peening. The results from the dry friction test indicated that the coating’s wear resistance was enhanced obviously. The wear mechanism of coatings with and without shot peening is an abrasive wear combined with an oxidation wear at wear test conditions of a low load and a low frequency. The coating with the best wear resistance did not have the strongest microhardness but had the highest compressive residual stress. The compressive residual stress had a significant positive influence on the wear resistance at a low frequency, while its effect is weakened at a high frequency.

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Section: Friction Coefficient and Wear Ratementioning

confidence: 98%

Synchronous Shot Peening Applied on HVOF for Improvement on Wear Resistance of Fe-based Amorphous Coating

et al. 2020

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“…The structure inevitably changes and the volume may change accordingly, causing the shrinkage of the cladding to be suppressed by the substrate and generating a tension on the cladding. Tensile stress corresponding to the edge of the substrate, by the force and reaction principle, forms a uniform compressive stress [ 28 ].…”

Section: Resultsmentioning

confidence: 99%

Microstructures and Properties of Laser Cladding Al-TiC-CeO2 Composite Coatings

Dejun

Song

2018

Materials

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Al-TiC-CeO2 composite coatings have been prepared by using a laser cladding technique, and the microstructure and properties of the resulting composite coatings have been investigated using scanning electron microscopy (SEM), a 3D microscope system, X-ray diffraction (XRD), micro-hardness testing, X-ray stress measurements, friction and wear testing, and an electrochemical workstation. The results showed that an Al-Fe phase appears in the coatings under different applied laser powers and shows good metallurgical bonding with the matrix. The dilution rate of the coating first decreases and then increases with increasing laser power. The coating was transformed from massive and short rod-like structures into a fine granular structure, and the effect of fine grain strengthening is significant. The microhardness of the coatings first decreases and then increases with increasing laser power, and the maximum microhardness can reach 964.3 HV0.2. In addition, the residual stress of the coating surface was tensile stress, and crack size increases with increasing stress. When the laser power was 1.6 kW, the coating showed high corrosion resistance.

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“…The reason behind the descendant trend of the residual stress is the lower thermal gradient between the clad and the substrate material and relatively slower cooling rate [16,23]. The slower the cooling rate, the material got longer time to come back to the original dimension.…”

Section: Resultsmentioning

confidence: 99%

“…The higher cooling rate generates higher misfit of strain, resulting higher residual stress [13]. Preheating of the substrate reduces the thermal gradient which significantly minimizes residual stresses and prevents cracks on the surface [16].…”

Section: 202 Page 2 Ofmentioning

confidence: 99%

An analytical model to predict and minimize the residual stress of laser cladding process

et al. 2018

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Laser cladding is one of the advanced thermal techniques used to repair or modify the surface properties of high-value components such as tools, military and aerospace parts. Unfortunately, tensile residual stresses are generated in the thermally treated area of this process. This work focuses on to investigate the key factors for the formation of tensile residual stress and how to minimize it in the clad when using dissimilar substrate and clad materials. To predict the tensile residual stress, a onedimensional analytical model has been adopted. Four cladding materials (Al 2 O 3 , TiC, TiO 2 , ZrO 2 ) on the H13 tool steel substrate and a range of preheating temperatures of the substrate, from 300 to 1200 K, have been investigated. Thermal strain and Young's modulus are found to be the key factors of formation of tensile residual stresses. Additionally, it is found that using a preheating temperature of the substrate immediately before laser cladding showed the reduction of residual stress.

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Effect of heat treatment on residual stress and wear behaviors of the TiNi/Ti2Ni based laser cladding composite coatings

Cited by 47 publications

References 29 publications

Synchronous Shot Peening Applied on HVOF for Improvement on Wear Resistance of Fe-based Amorphous Coating

Synchronous Shot Peening Applied on HVOF for Improvement on Wear Resistance of Fe-based Amorphous Coating

Microstructures and Properties of Laser Cladding Al-TiC-CeO2 Composite Coatings

An analytical model to predict and minimize the residual stress of laser cladding process

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