Journal ArticleDOI
Analysis of laser beam weldability of Inconel 738 superalloy
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In this paper, the susceptibility of pre-weld heat treated laser beam welded IN 738 superalloy to heat affected zone (HAZ) cracking was studied, and the authors found that a pre-Weld heat treatment that produced the minimal grain boundary liquation resulted in a higher level of cracking compared to those with more intergranular liquation.About:
This article is published in Materials Characterization.The article was published on 2010-05-01. It has received 101 citations till now. The article focuses on the topics: Heat-affected zone & Liquation.read more
Citations
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Journal ArticleDOI
Characterization of heat affected zone liquation cracking in laser additive manufacturing of Inconel 718
TL;DR: In this paper, the authors investigated the effect of grain boundary misorientation on susceptibility to liquation cracking in laser additive manufactured Inconel 718, and the results showed that the tendency of liquation film to crack increased with grain boundary angle, which was considered to be attributed to the higher stability of liquid at larger grain boundary during the last stage of solidification.
Book ChapterDOI
Laser Powder Bed Fabrication of Nickel-Base Superalloys: Influence of Parameters; Characterisation, Quantification and Mitigation of Cracking
TL;DR: In this paper, microstructural and physical properties of the Ni-based superalloy CM247LC were investigated by using a stereological study of scanning electron microscope (SEM) micrographs.
Journal ArticleDOI
The liquation cracking behavior of IN738LC superalloy during low power Nd:YAG pulsed laser welding
M. Montazeri,F.M. Ghaini +1 more
TL;DR: In this paper, the liquation cracking behavior of low power pulsed Nd:YAG laser welded IN738LC was studied using several pre-weld heat treatment cycles.
Journal ArticleDOI
Effect of welding thermal treatment on the microstructure and mechanical properties of nickel-based superalloy fabricated by selective laser melting
Li Liang,Li Liang,Mingfang Xu,Yuhua Chen,Timing Zhang,Wei Tong,Huiting Liu,Huijuan Wang,Hongxiang Li +8 more
TL;DR: In this article, Gleeble thermal simulations were employed to investigate the influence of welding heat on grain morphology, carbide evolution, and mechanical properties of Inconel 625 alloys manufactured by selective laser melting.
Journal ArticleDOI
The initiation and propagation mechanism of the overlapping zone cracking during laser solid forming of IN-738LC superalloy
TL;DR: In this article, the authors investigated the cracking mechanism in the overlapping zone (OZ) of laser solid forming (LSF) of IN-738LC alloy and found that both the solidification cracks and liquation cracks can be found in the OZ of the LSFed IN- 738LC specimen, and the results showed that the cracks always propagated along the high-angle grain boundaries due to their relatively wider solidification temperature range compared with the lower angle grain boundaries.
References
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Journal ArticleDOI
Microstructural study of weld fusion zone of TIG welded IN 738LC nickel-based superalloy
TL;DR: In this article, the weld fusion zone microstructure of a commercial aerospace superalloy IN 738 was examined and the elemental segregation induced interdendritic microconstituents were identified to include terminal solidification product M3B2 and Ni7Zr2 in association with γ-γ′ eutectic constituent.
Journal ArticleDOI
On the magnitude of the solid/liquid interfacial energy of pure metals and its relation to grain boundary melting
W.A. Miller,G.A. Chadwick +1 more
TL;DR: In this article, the problem of grain boundary melting is reconsidered in the light of these findings, and it is concluded that boundaries should melt at undercoolings within the range 0.02Tm.
Journal ArticleDOI
Hot cracking in Al–Mg–Si alloy laser welding – operating parameters and their effects
TL;DR: In this paper, the authors consider what the most important parameters may be, relating to tensile strength and the quantity of cracks produced, that might influence the presence or absence of hot cracking.
Journal ArticleDOI
Microstructural Analysis of Laser-Beam-Welded Directionally Solidified INCONEL 738
TL;DR: In this article, a laser welding of a directionally solidified INCONEL 738 superalloy (DS IN738) was investigated, and microstructural analysis of the fusion zone (FZ) and the heat-affected zone (HAZ) revealed that cracking occurred mainly in HAZ with only some cracks being extended into the FZ.