Grain growth of Ni-based superalloy IN718 coating fabricated by pulsed laser deposition

Zhang, Yaocheng; Yang, Li; Dai, Jun; Huang, Zedong; Meng, Tao

doi:10.1016/j.optlastec.2016.01.015

Cited by 35 publications

(5 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The sub-grains measure up to 125 µm long with an average width of 26 µm. This result agrees with previous studies [7,21] that show similar observations in microstructure. The pole figure shown in Fig.…”

Section: Microstructuresupporting

confidence: 94%

Microstructural studies of direct-laser-deposited stainless steel 316L-Si on 316L base material

2020

View full text Add to dashboard Cite

Section: Microstructuresupporting

confidence: 94%

Microstructural studies of direct-laser-deposited stainless steel 316L-Si on 316L base material

2020

View full text Add to dashboard Cite

“…The small white particles were precipitated along the interdendritic regions, and dendritic arm spacing became larger as the number of deposited layers increased. According to the previous studies [ 23 , 24 , 25 , 26 , 27 , 28 ], similar precipitation morphology was observed and identified as Laves phase which was segregated from the austenite γ matrix during the rapid solidification of IN718.…”

Section: Resultssupporting

confidence: 68%

Laser Engineered Net Shaping of Nickel-Based Superalloy Inconel 718 Powders onto AISI 4140 Alloy Steel Substrates: Interface Bond and Fracture Failure Mechanism

et al. 2017

View full text Add to dashboard Cite

As a prospective candidate material for surface coating and repair applications, nickel-based superalloy Inconel 718 (IN718) was deposited on American Iron and Steel Institute (AISI) 4140 alloy steel substrate by laser engineered net shaping (LENS) to investigate the compatibility between two dissimilar materials with a focus on interface bonding and fracture behavior of the hybrid specimens. The results show that the interface between the two dissimilar materials exhibits good metallurgical bonding. Through the tensile test, all the fractures occurred in the as-deposited IN718 section rather than the interface or the substrate, implying that the as-deposited interlayer bond strength is weaker than the interfacial bond strength. From the fractography using scanning electron microscopy (SEM) and energy disperse X-ray spectrometry (EDS), three major factors affecting the tensile fracture failure of the as-deposited part are (i) metallurgical defects such as incompletely melted powder particles, lack-of-fusion porosity, and micropores; (ii) elemental segregation and Laves phase, and (iii) oxide formation. The fracture failure mechanism is a combination of all these factors which are detrimental to the mechanical properties and structural integrity by causing premature fracture failure of the as-deposited IN718.

show abstract

“…[ 47 ] Referring Figure 9a, it can be seen that <100> is the preferred direction in FCC alloys. [ 48 ] The grains are randomly oriented and inherently equiaxed, as observed from the IPF map (refer to Figure 9a). The microstructure of the substrate shows the pearlite structure (colored black) surrounded by equiaxed ferrite grains along with few nonmetallic inclusions and the fraction of LAGBs is 65%, as presented in Figure 9b.…”

Section: Resultsmentioning

confidence: 94%

Microstructure, Mechanical Properties, and Corrosion Behavior of Co‐Based Stellite 6 Multilayer Overlays Deposited on ASTM A36 Steel by Gas Metal Arc Welding Process

Sankarapandian¹,

Kumar

Kannan

et al. 2023

steel research int.

View full text Add to dashboard Cite

Hardfacing is an effective method for restoring the damaged part. Herein, cobalt‐based superalloy Stellite‐6 is deposited on A36 substrate using gas metal arc welding process. The mechanical properties, microstructure, and corrosion behavior of Stellite‐6 overlays on A36 substrate are examined. Defect‐free hard overlays are obtained, and a dilution ratio of 19.9% is achieved with weaving technique. X‐ray diffraction analysis reveals the presence of M7C3, M23C6, M6C, and martensite in the Stellite‐6 hard overlays. The microstructure of the deposit contains martensite, carbides, and interdendritic precipitates while the mean hardness is 471 HV0.5. Tensile testing with specimens extracted on the longitudinal (LD) and transverse (TD) orientation of the stellite‐6 deposit shows a strength above 950 MPa along with the brittle nature of fracture. Grain growth is epitaxial and shows dendritic morphologies. The higher fraction of high‐angle grain boundaries improves the tensile strength of the deposit and interface region. The localized corrosion behavior of stellite‐6 hard overlays is found to be excellent, and the corrosion analysis exhibits a corrosion rate of 0.10 mils per year (mpy). The outcomes of the study highlight the feasibility of Stellite‐6 hard overlays for extending the service life of A36 steel in chloride environments.

show abstract

Grain growth of Ni-based superalloy IN718 coating fabricated by pulsed laser deposition

Cited by 35 publications

References 26 publications

Microstructural studies of direct-laser-deposited stainless steel 316L-Si on 316L base material

Microstructural studies of direct-laser-deposited stainless steel 316L-Si on 316L base material

Laser Engineered Net Shaping of Nickel-Based Superalloy Inconel 718 Powders onto AISI 4140 Alloy Steel Substrates: Interface Bond and Fracture Failure Mechanism

Microstructure, Mechanical Properties, and Corrosion Behavior of Co‐Based Stellite 6 Multilayer Overlays Deposited on ASTM A36 Steel by Gas Metal Arc Welding Process

Contact Info

Product

Resources

About