scholarly journals Effect of Al content on microstructure and microhardness of Inconel 718 superalloy fabricated by laser additive manufacturing

2022 ◽  
Author(s):  
Wenjun Zhang ◽  
Fenggang Liu ◽  
Fencheng Liu ◽  
Chunping Huang ◽  
Lixin Liu ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Inconel 718 ◽  
Laser Additive Manufacturing ◽  
Al Content ◽  
Inconel 718 Superalloy

Review on Powder-Bed Laser Additive Manufacturing of Inconel 718 Parts

2015 ◽  
Author(s):  
Xiaoqing Wang ◽  
Xibing Gong ◽  
Kevin Chou
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Literature Review ◽  
Selective Laser Melting ◽  
Inconel 718 ◽  
Manufacturing Processes ◽  
Laser Melting ◽  
Laser Additive Manufacturing ◽  
Powder Bed ◽  
General Aspects

This study presents a thorough literature review on the powder-bed laser additive manufacturing processes such as selective laser melting (SLM) of Inconel 718 parts. The paper first introduces the general aspects of powder-bed laser additive manufacturing and then discusses the unique characteristics and advantages of SLM. Moreover, the bulk of this study includes extensive discussions of microstructures and mechanical properties, together with the application ranges, of Inconel 718 parts fabricated by SLM.

Characterization of heat affected zone liquation cracking in laser additive manufacturing of Inconel 718

2016 ◽  
Vol 90 ◽  
pp. 586-594 ◽  
Author(s):  
Yuan Chen ◽  
Ke Zhang ◽  
Jian Huang ◽  
Seyed Reza Elmi Hosseini ◽  
Zhuguo Li
Keyword(s):  
Additive Manufacturing ◽  
Heat Affected Zone ◽  
Inconel 718 ◽  
Laser Additive Manufacturing ◽  
Liquation Cracking ◽  
Zone Liquation

scholarly journals Direct Laser Metal Deposition (DLMD) Additive Manufacturing (AM)of Inconel 718 Superalloy: Elemental, Microstructural and Physical Properties Evaluation

2021 ◽  
Author(s):  
Mahmoud Moradi ◽  
Zeynab Pourmand ◽  
Arman Hasani ◽  
Mojtaba Karami Moghadam ◽  
Amir Hosein Sakhaei ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Feed Rate ◽  
Inconel 718 ◽  
Scanning Speed ◽  
Laser Metal Deposition ◽  
Powder Feed Rate ◽  
Direct Laser ◽  
Inconel 718 Superalloy ◽  
The Stability ◽  
Direct Laser Metal Deposition

Abstract In this study direct laser metal deposition (DLMD) technique is adopted for the additive manufacturing (AM) of Inconel 718 Superalloy. To conduct the experiments, a 1 kW fiber laser with a coaxial nozzle head is used. The effects of scanning speed (for two values of 2.5 and 5 mm/s) as well as powder feed rate (for two values of 17.94 and 28.52 g/min) on the process were investigated. Characteristics of the 3D printed wall specimens such as the geometrical dimensions (width and height), microstructure observations, and the microhardness were obtained. In order to study the stability of the 3D manufactured walls, the height stability was considered for the investigation. Optical microscopy (OM), field emission electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDS), and mapping analysis were performed to derive the microstructural features of the additive manufactured samples. The Vickers microhardness test is used to evaluate the hardness distributions of additively manufactured parts. Catchment concept of the powder in DLMD process is used for explaining different trends of the process. Results indicated that, by decreasing the scanning speed, the width and height of the deposited layer increase. The average width of the additively manufactured samples directly depends on the scanning speed and the powder feed rate. Scanning speed has a reverse effect on the height stability; that is, the lower the scanning speed, the larger the stability. Microstructural results showed that because of the solidification process, the alloying elements will be accumulated in the grain boundaries. The non-uniform cooling rate and non-steady solidification rates of molten area in additive manufacturing process, the microhardness values of the additively manufactured samples following a fluctuated trend.

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