Investigation on microstructure and mechanical properties of Fe-based amorphous coatings prepared via laser cladding assisted with ultrasonic vibration

Xiao, Mingying; Jiang, Fengchun; Guo, Chunhuan; Song, Haolun; Dong, Tao

doi:10.1016/j.optlastec.2023.109294

Cited by 23 publications

(3 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, under such conditions, the cooling speed will exceed the critical speed, and as a result, not only the melt around the coating powder, but also the rest of the coating will be formed in an amorphous form. Xiao et al [28] reported that the critical rate of conversion of crystalline to amorphous material in iron-base alloy Fe 41 Co 7 Cr 15 Mo 14 C 15 B 6 Y 2 was obtained under the conditions of temperature gradient and cooling rate of 10 6 K m −1 and 10 4 K s −1 , respectively.…”

Section: Resultsmentioning

confidence: 99%

The effect of ultrasonic field on the microstructure and corrosion behavior of Fe-based amorphous coating applied to selective laser melting

Taheri

Razavi

2023

Mater. Res. Express

View full text Add to dashboard Cite

This study was conducted to investigate the effect of the ultrasonic field on the preparation of amorphous/crystalline Fe-based coatings. For this purpose, Fe86.3Si 5.9B3.2Cr4.6 (wt.%) powder was deposited on GTD-111 superalloy substrate with and without ultrasonic field by selective laser melting method. After coating, the corrosion behavior, microstructure, and hardness of the amorphous coating were investigated. The results showed that in conditions without ultrasonic vibration, the growth of grains starts in columnar form. At the same time, the use of an ultrasonic field inhibits columnar growth and creates equiaxed grains. In addition, the ultrasonic field increased the amorphous phase by 34.5%. This is attributed to the increased solidification rate caused by the cavitation effect. The experimental results of corrosion show that the self-corrosion current density of 6.83×10-7 A⋅cm2 is obtained due to the refinement of the microstructure and the increase of the amorphous phase. The wear results showed that the increase in the amorphous phase, as well as the decrease in the grain size, reduction in the grain ratio, and the increase in the tendency to equiaxed grains when using the ultrasonic field, reduce the coefficient of friction by 97%.

show abstract

Section: Resultsmentioning

confidence: 99%

The effect of ultrasonic field on the microstructure and corrosion behavior of Fe-based amorphous coating applied to selective laser melting

Taheri

Razavi

2023

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…After further magnification (Figure 3d), we confirmed that ultrasonic promotes the growth of columnar and equiaxed crystals in the transition zone, which become coarser. The in situ generated micro-gradient structure reduces differences in mechanical properties, such as hardness, elastic modulus, and plasticity between the amorphous coating and the substrate, effectively improving the toughness and bonding strength of the coating, and reducing cracks [26]. Figure 3 shows the microstructure of Fe-based amorphous coating (U1000) fabricated via laser cladding with ultrasonic.…”

Section: Microstructural Examination Resultsmentioning

confidence: 99%

Corrosion Performance of Fe-Based Amorphous Coatings via Laser Cladding Assisted with Ultrasonic in a Simulated Marine Environment

Han,

Xiao,

Wang

2023

Metals

Self Cite

View full text Add to dashboard Cite

Fe-based amorphous alloys are considered potential coating materials for applications in marine corrosive environments owing to their high resistance to chloride ion corrosion. Fe-based amorphous alloy (Fe41Co7Cr15Mo14C15B6Y2) was deposited on AISI 1020 steel using ultrasonic-assisted laser cladding. The research findings revealed a gradient structure generated at the junction of the coating and substrate. Ultrasonic promoted crystallization and increased the gradient structure’s average thickness, reducing coating surface cracks. However, ultrasonic had little effect on the amorphous content of the prepared coating surface, which still had a high amorphous content. The Fe-based amorphous coating prepared via laser cladding with ultrasonic demonstrated good corrosion resistance. The corrosion resistance of the coating without ultrasonic was reduced significantly due to cracks. EIS results confirmed that corrosion resistance was related to crystallization and crack issues. Cr element segregation due to crystallization hindered passivation film forming, reducing its corrosion resistance. Crack corrosion enlarged the crack gap and hollowed out the coating and the substrate’s binding zone, accelerating coating failure.

show abstract

“…Since the horn and ultrasonic transducer are located in the lower part of the specimen (see Figure 2a), the lower part of the coating has finer grains than the upper part. Meanwhile, in various research, by placing the horn on top of the coating, the lower part of the coating was less likely to crumble [34]. In our previous work [26], where the horn and ultrasonic transducer were placed on the top of the specimen, this issue showed that the grains on the top of the coating were more refined than those on the bottom.…”

Section: Microstructural Investigationsmentioning

confidence: 95%

The Effect of an Ultrasonic Field on the Microstructure and Tribological Behavior of ZrB2/ZrC+Ni60A/WC Composite Coating Applied by Laser Cladding

Wei,

Najafi,

Taheri

et al. 2023

Coatings

View full text Add to dashboard Cite

Ni60A/WC composite coating reinforced with ZrB2/ZrC was layered on GTD-111 superalloy by laser cladding. The effect of an ultrasonic field on coating formation, microstructure, microhardness, and wear was investigated and analyzed. The results showed that the resulting coating had pores and microcracks, which were removed when using an ultrasonic field. Ultrasonic fields increased the heat input and increased the dimensions of the coating pool by creating a cavitation effect. The dendrites of the coating microstructure were mainly composed of Zr(B, C) and ZrC blocks and small α-Zr dendrites. The mechanical vibrations resulting from the application of ultrasonic fields caused the crushing of the growing dendrites, and as a result, the grains and dendrites crumbled. By decreasing the grain size, the average hardness increases from 312 HV for coating without an ultrasonic field to 617 HV for coating with 300 W ultrasonic power. The results of the wear test also showed that the sample coated with 300 W of ultrasonic power, with a coefficient of friction of 0.41 and scar wear of 6.8 µm, has the highest wear resistance due to the removal of porosity and the presence of equiaxed grains on the top and bottom of the clad zone.

show abstract

Investigation on microstructure and mechanical properties of Fe-based amorphous coatings prepared via laser cladding assisted with ultrasonic vibration

Cited by 23 publications

References 48 publications

The effect of ultrasonic field on the microstructure and corrosion behavior of Fe-based amorphous coating applied to selective laser melting

The effect of ultrasonic field on the microstructure and corrosion behavior of Fe-based amorphous coating applied to selective laser melting

Corrosion Performance of Fe-Based Amorphous Coatings via Laser Cladding Assisted with Ultrasonic in a Simulated Marine Environment

The Effect of an Ultrasonic Field on the Microstructure and Tribological Behavior of ZrB2/ZrC+Ni60A/WC Composite Coating Applied by Laser Cladding

Contact Info

Product

Resources

About