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

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.

scholarly journals Heat-Affected-Zone Liquation Cracking in Welded Cast Haynes® 282®

Metals ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 29 ◽  
Author(s):  
Sukhdeep Singh ◽  
Joel Andersson
Keyword(s):  
Heat Treatment ◽  
Heat Affected Zone ◽  
Heat Treatments ◽  
Treatment Temperature ◽  
Mass Spectrometry Analysis ◽  
Liquation Cracking ◽  
Spectrometry Analysis ◽  
Thermomechanical Simulation ◽  
Common Understanding ◽  
Zone Liquation

Varestraint weldability testing and Gleeble thermomechanical simulation of the newly developed cast form of Haynes® 282® were performed to understand how heat-affected-zone (HAZ) liquation cracking is influenced by different preweld heat treatments. In contrast to common understanding, cracking susceptibility did not improve with a higher degree of homogenization achieved at a higher heat-treatment temperature. Heat treatments with a 4 h dwell time at 1120 °C and 1160 °C exhibited low cracking sensitivity, whereas by increasing the temperature to 1190 °C, the cracking was exacerbated. Nanosecond ion mass spectrometry analysis was done to characterize B segregation at grain boundaries that the 1190 °C heat treatment indicated to be liberated from the dissolution of C–B rich precipitates.

Morphology of weld heat-affected zone liquation cracking in Ta-modified cast Alloy 718

Metallography ◽  
1989 ◽  
Vol 23 (3) ◽  
pp. 219-229 ◽  
Author(s):  
S.L. West ◽  
W.A. Baeslack ◽  
T.J. Kelly
Keyword(s):  
Heat Affected Zone ◽  
Cast Alloy ◽  
Alloy 718 ◽  
Liquation Cracking ◽  
Cast Alloy 718 ◽  
Zone Liquation ◽  
Weld Heat

scholarly journals Power Density Distribution for Laser Additive Manufacturing (SLM): Potential, Fundamentals and Advanced Applications

Technologies ◽  
2018 ◽  
Vol 7 (1) ◽  
pp. 5 ◽  
Author(s):  
Alexander Metel ◽  
Michael Stebulyanin ◽  
Sergey Fedorov ◽  
Anna Okunkova
Keyword(s):  
Additive Manufacturing ◽  
Laser Beam ◽  
Density Distribution ◽  
Power Density ◽  
Selective Laser Melting ◽  
Laser Melting ◽  
Laser Additive Manufacturing ◽  
Power Density Distribution ◽  
Advanced Applications

Problems with the laser additive manufacturing of metal parts related to its low efficiency are known to hamper its development and application. The method of selective laser melting of metallic powders can be improved by the installation of an additional laser beam modulator. This allows one to control the power density distribution optically in the laser beam, which can influence the character of heat and mass transfer in a molten pool during processing. The modulator contributes alternative modes of laser beam: Gaussian, flat top (top hat), and donut (bagel). The study of its influence includes a mathematical description and theoretical characterization of the modes, high-speed video monitoring and optical diagnostics, characterization of processing and the physical phenomena of selective laser melting, geometric characterization of single tracks, optical microscopy, and a discussion of the obtained dependences of the main selective laser melting (SLM) parameters and the field of its optimization. The single tracks were produced using the advanced technique of porosity lowering. The parameters of the obtained samples are presented in the form of 3D graphs. The further outlook and advanced applications are discussed.

Sign in / Sign up

Export Citation Format

Share Document