Effect of TiC and Magnetic Field on Microstructure and Mechanical Properties of IN738 Superalloy Processed by Selective Laser Melting

Zhang, Bing; Shirvani, Kourosh; Taheri, Morteza; Beirami, Khashayar; Wang, Yinwei

doi:10.1007/s11665-023-08228-2

Cited by 8 publications

(2 citation statements)

References 43 publications

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“…In a study, Paidar et al [44] reported the formation of equiaxed grains in the coating as the cause of the increased wear resistance due to stronger atomic bonding. Similar results were also reported by Wang et al [45]. In this study, the MT2 specimen with zigzag grain boundaries (see Figure 12) has stronger atomic bonds, and as a result, it undergoes plastic deformation later.…”

Section: Wearsupporting

confidence: 90%

Microstructure of NbMoTaTiNi Refractory High-Entropy Alloy Coating Fabricated by Ultrasonic Field-Assisted Laser Cladding Process

Zhao,

Taheri,

Shirvani

et al. 2023

Coatings

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Refractory high-entropy alloys (RHEAs) contain alloying elements with a high melting point, promising high-temperature applications due to their unique properties. In this work, laser cladding is used to prepare RHEAS based on NbMoTaTiNi. At the same time as laser cladding, the ultrasonic field is used, and then the microstructural characteristics, grain size, residual stress, wear, and hardness of the coating are evaluated. The results show that the coating is biphasic and includes the γ (Ni) and NbMoTaTiNi phase. The NbMoTaTiNi phase had a uniform distribution throughout the coating when the ultrasonic field was applied, so that when the ultrasonic field was not used, the NbMoTaTiNi powder, in addition to spreading uniformly, had the un-melting of large particles. This caused an increase in the residual tension of the coating. The conversion of columnar grains to the equiaxed, and the reduction in structural defects, were other characteristics of using the ultrasonic field. The formation of equiaxed grains with zigzag grain boundaries reduced the friction coefficient, wear volume loss, and the wear rate of the coating applied with ultrasonic.

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Section: Wearsupporting

confidence: 90%

Microstructure of NbMoTaTiNi Refractory High-Entropy Alloy Coating Fabricated by Ultrasonic Field-Assisted Laser Cladding Process

Zhao,

Taheri,

Shirvani

et al. 2023

Coatings

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“…One of the limitations of increasing the laser power is the creation of liquation cracks in the HAZ [30]. Zhang et al [31] reported that with the increase in laser power in the coating of IN738 superalloy, the HAZ zone expands, and grain boundary melts are created around the γ′ phase, which becomes cracks by applying shrinkage stresses. In Figure 3, it is shown that the highest After coating, the specimens were cut perpendicular to the coating by a wire cutter.…”

Section: Microstructural Investigationsmentioning

confidence: 99%

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

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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.

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Preparation and Characterization of Al-ZrB2 Composites by Planetary Milling and Equal Channel Angular Pressing: Effect of ZrB2 Amount and Milling Time on Wear Behavior and Compressive Strength

Jafari,

Montazeri-Pour,

Rajabi

2024

J. of Materi Eng and Perform

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Effect of TiC and Magnetic Field on Microstructure and Mechanical Properties of IN738 Superalloy Processed by Selective Laser Melting

Cited by 8 publications

References 43 publications

Microstructure of NbMoTaTiNi Refractory High-Entropy Alloy Coating Fabricated by Ultrasonic Field-Assisted Laser Cladding Process

Microstructure of NbMoTaTiNi Refractory High-Entropy Alloy Coating Fabricated by Ultrasonic Field-Assisted Laser Cladding Process

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

Preparation and Characterization of Al-ZrB2 Composites by Planetary Milling and Equal Channel Angular Pressing: Effect of ZrB2 Amount and Milling Time on Wear Behavior and Compressive Strength

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