Optimization of responses in electron beam welding of inconel-718 alloy using genetic algorithm approach

This research was aimed at investigating the high temperature oxidation behavior of Inconel 718 superalloy fabricated by electron beam melting with the building direction of 0°, 55° and 90° deviation from the Z axis of cylindrical samples. Columnar γ-fcc phase with preferred crystal orientations was found in all specimens. With the temperature ranging from 700 to 1000 °C, the 0° sample, symbolized by the lowest grain boundary density, and largest grain size, reveals the best oxidation performance. It is concluded that the building direction has more impact on the amount of grain boundary density than crystal orientation, which determined the oxidation resistance.

Download Full-text

Investigation on Microstructure, Hardness and Wear Resistance of Electron Beam Wire-Feeding Deposited Inconel 718 Alloy Coatings

Metals and Materials International ◽

10.1007/s12540-019-00494-x ◽

2019 ◽

Cited By ~ 1

Author(s):

Dongheng Xu ◽

Han Wang ◽

Xuewei Tao ◽

Zhengjun Yao ◽

Shasha Zhang ◽

...

Keyword(s):

Wear Resistance ◽

Electron Beam ◽

Inconel 718 ◽

Inconel 718 Alloy ◽

Wire Feeding

Download Full-text

A study of the heat-affected zone (HAZ) of an Inconel 718 sheet welded with electron-beam welding (EBW)

Materials Science and Engineering A ◽

10.1016/j.msea.2005.03.029 ◽

2005 ◽

Vol 398 (1-2) ◽

pp. 275-281 ◽

Cited By ~ 47

Author(s):

C.A. Huang ◽

T.H. Wang ◽

C.H. Lee ◽

W.C. Han

Keyword(s):

Electron Beam ◽

Heat Affected Zone ◽

Inconel 718 ◽

Electron Beam Welding

Download Full-text

Validation of three-dimensional finite element model for electron beam welding of Inconel 718

Science and Technology of Welding & Joining ◽

10.1179/174329305x48347 ◽

2005 ◽

Vol 10 (6) ◽

pp. 717-724 ◽

Cited By ~ 35

Author(s):

A. Lundbäck ◽

H. Runnemalm

Keyword(s):

Finite Element ◽

Electron Beam ◽

Finite Element Model ◽

Inconel 718 ◽

Electron Beam Welding ◽

Three Dimensional ◽

Element Model ◽

Dimensional Finite Element ◽

Three Dimensional Finite Element

Download Full-text

Electron Beam Welding of Rolled and Laser Powder Bed Fused Inconel 718

10.21203/rs.3.rs-987398/v1 ◽

2021 ◽

Author(s):

Akash Sali ◽

Vivek Patel ◽

James Hyder ◽

David Hyder ◽

Mike Corliss ◽

...

Keyword(s):

Electron Beam ◽

Heat Input ◽

Inconel 718 ◽

Electron Beam Welding ◽

High Heat ◽

Chemical Compositions ◽

Minimum Requirement ◽

Powder Bed ◽

Processing Techniques

Abstract This paper explores the feasibility of welding Inconel 718 (IN718) and compares the quality of electron beam welded samples produced by rolling and laser-based powder bed fused (L-PBF). Electron beam heat input, varying in the range 175-300 J/mm, was the main parameter in welding. Microhardness, tensile properties, and fractography study using both optical and scanning electron microscopy were employed to analyze and compare the quality of the welded samples. Energy dispersive x-ray analysis was used to identify chemical compositions of different phases on the fractured surfaces. Large voids were observed at high heat inputs (≥ 213 J/mm). Excellent weld penetration was obtained and was proportional to the beam heat input. Both yield and tensile strength of the welded L-PBF’ed materials exceeded those of rolled materials and met the minimum requirement from ASTM specification; however, the ductility of welded L-PBF’ed material did not. The brittleness of these L-PBF’ed materials came from the brittle Laves phase and Al-Ti-O compounds in the microstructure and non-optimal L-PBF parameters. These drawbacks can be further reduced by adjusting the L-PBF parameters and suitable post-processing techniques before electron beam welding.

Download Full-text

THE STRUCTURE AND COEFFICIENT OF FRICTION OF WELDED NICKEL ALLOYS INCONEL 625 AND INCONEL 718

Tribologia ◽

10.5604/01.3001.0012.7660 ◽

2018 ◽

Vol 281 (5) ◽

pp. 109-115

Author(s):

Katarzyna STRZELCZAK ◽

Agata DUDEK

Keyword(s):

Heat Treatment ◽

Electron Beam ◽

Coefficient Of Friction ◽

Inconel 718 ◽

Nickel Alloys ◽

Precipitation Hardening ◽

Electron Beam Welding ◽

Stress Gradient ◽

Test Method ◽

Inconel 625

In this study, the coefficients of friction for three series of welded nickel alloy joints, subjected to different heat treatments (lack of heat treatment, solution heat treatment, precipitation hardening), were determined. Heat treatment of the prepared samples was aimed at eliminating the structural and stress gradient, because the electron beam welding technique is dedicated for constructions with very high quality and strength requirements. Given the nature of the electron beam process, the authors are aware that the obtained weld’s structures are characterized by different properties from parent materials, and also from structures melted under equilibrium conditions. The scientific aim of the presented work is to determine the influence of heat treatment on the microstructure, mechanical properties, and performance of dissimilar joints of nickel alloys Inconel 625 and Inconel 718. In order to determine the coefficient of friction for samples, the scratch test method was used. As a result of the research, it was proved that subjecting the welds to the precipitation hardening has a significant effect on abrasion resistance.

Download Full-text