Effects of flux precoating and process parameter on welding performance of Inconel 718 alloy TIG welds

Hsuan Liang Lin; Tong Min Wu; Ching Min Cheng

doi:10.1007/s11665-013-0756-z

Effects of flux precoating and process parameter on welding performance of Inconel 718 alloy TIG welds

Hsuan Liang Lin^*, Tong Min Wu, Ching Min Cheng

^*Corresponding author for this work

Department of Mechatronic Engineering

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

The purpose of this study is to investigate the effect of activating flux on the depth-to-width ratio (DWR) and hot cracking susceptibility of Inconel 718 alloy tungsten inert gas (TIG) welds. The Taguchi method is employed to investigate the welding parameters that affect the DWR of weld bead and to achieve optimal conditions in the TIG welds that are coated with activating flux in TIG (A-TIG) process. There are eight single-component fluxes used in the initial experiment to evaluate the penetration capability of A-TIG welds. The experimental results show that the Inconel 718 alloy welds precoated with 50% SiO₂ and 50% MoO₃ flux were provided with better welding performance such as DWR and hot cracking susceptibility. The experimental procedure of TIG welding process using mixed-component flux and optimal conditions not only produces a significant increase in DWR of weld bead, but also decreases the hot cracking susceptibility of Inconel 718 alloy welds.

Original language	English
Pages (from-to)	125-132
Number of pages	8
Journal	Journal of Materials Engineering and Performance
Volume	23
Issue number	1
DOIs	https://doi.org/10.1007/s11665-013-0756-z
Publication status	Published - 2014 Jan

Keywords

Activating flux
Hot cracking
Inconel 718 alloy
TIG welding
Welds morphology

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

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title = "Effects of flux precoating and process parameter on welding performance of Inconel 718 alloy TIG welds",

abstract = "The purpose of this study is to investigate the effect of activating flux on the depth-to-width ratio (DWR) and hot cracking susceptibility of Inconel 718 alloy tungsten inert gas (TIG) welds. The Taguchi method is employed to investigate the welding parameters that affect the DWR of weld bead and to achieve optimal conditions in the TIG welds that are coated with activating flux in TIG (A-TIG) process. There are eight single-component fluxes used in the initial experiment to evaluate the penetration capability of A-TIG welds. The experimental results show that the Inconel 718 alloy welds precoated with 50% SiO2 and 50% MoO3 flux were provided with better welding performance such as DWR and hot cracking susceptibility. The experimental procedure of TIG welding process using mixed-component flux and optimal conditions not only produces a significant increase in DWR of weld bead, but also decreases the hot cracking susceptibility of Inconel 718 alloy welds.",

keywords = "Activating flux, Hot cracking, Inconel 718 alloy, TIG welding, Welds morphology",

author = "Lin, {Hsuan Liang} and Wu, {Tong Min} and Cheng, {Ching Min}",

note = "Funding Information: The authors gratefully acknowledge the financial support for this research provided by the National Science Council, Taiwan, Republic of China, under the Grant No. NSC 98-2221-E-539-001.",

year = "2014",

month = jan,

doi = "10.1007/s11665-013-0756-z",

language = "English",

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AU - Lin, Hsuan Liang

AU - Wu, Tong Min

AU - Cheng, Ching Min

N1 - Funding Information: The authors gratefully acknowledge the financial support for this research provided by the National Science Council, Taiwan, Republic of China, under the Grant No. NSC 98-2221-E-539-001.

PY - 2014/1

Y1 - 2014/1

N2 - The purpose of this study is to investigate the effect of activating flux on the depth-to-width ratio (DWR) and hot cracking susceptibility of Inconel 718 alloy tungsten inert gas (TIG) welds. The Taguchi method is employed to investigate the welding parameters that affect the DWR of weld bead and to achieve optimal conditions in the TIG welds that are coated with activating flux in TIG (A-TIG) process. There are eight single-component fluxes used in the initial experiment to evaluate the penetration capability of A-TIG welds. The experimental results show that the Inconel 718 alloy welds precoated with 50% SiO2 and 50% MoO3 flux were provided with better welding performance such as DWR and hot cracking susceptibility. The experimental procedure of TIG welding process using mixed-component flux and optimal conditions not only produces a significant increase in DWR of weld bead, but also decreases the hot cracking susceptibility of Inconel 718 alloy welds.

AB - The purpose of this study is to investigate the effect of activating flux on the depth-to-width ratio (DWR) and hot cracking susceptibility of Inconel 718 alloy tungsten inert gas (TIG) welds. The Taguchi method is employed to investigate the welding parameters that affect the DWR of weld bead and to achieve optimal conditions in the TIG welds that are coated with activating flux in TIG (A-TIG) process. There are eight single-component fluxes used in the initial experiment to evaluate the penetration capability of A-TIG welds. The experimental results show that the Inconel 718 alloy welds precoated with 50% SiO2 and 50% MoO3 flux were provided with better welding performance such as DWR and hot cracking susceptibility. The experimental procedure of TIG welding process using mixed-component flux and optimal conditions not only produces a significant increase in DWR of weld bead, but also decreases the hot cracking susceptibility of Inconel 718 alloy welds.

KW - Activating flux

KW - Hot cracking

KW - Inconel 718 alloy

KW - TIG welding

KW - Welds morphology

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Effects of flux precoating and process parameter on welding performance of Inconel 718 alloy TIG welds

Abstract

Keywords

ASJC Scopus subject areas

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