Studies on the weldability, microstructure and mechanical properties of activated flux TIG weldments of Inconel 718

被引：54

作者：

Ramkumar, K. Devendranath ^{[1
]}

Kumar, B. Monoj ^{[1
]}

Krishnan, M. Gokul ^{[1
]}

Dev, Sidarth ^{[1
]}

Bhalodi, Aman Jayesh ^{[1
]}

Arivazhagan, N. ^{[1
]}

Narayanan, S. ^{[1
]}

机构：

[1] VIT Univ, Sch Mech & Bldg Sci, Vellore 632014, Tamil Nadu, India

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 639卷

关键词：

Inconel; 718; A-TIG welding; Flux; Laves phase; Tensile strength; Impact toughness; AUSTENITIC STAINLESS-STEEL; LAVES PHASE; WELDS; PERFORMANCE; STRESS;

D O I：

10.1016/j.msea.2015.05.004

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This research article addresses the joining of 5 mm thick plates of Inconel 718 by activated flux tungsten inert gas (A-TIG) welding process using SiO2 and TiO2 fluxes. Microstructure studies inferred the presence of Nb rich eutectics and/or laves phase in the fusion zone of the A-TIG weldments. Tensile studies corroborated that the ultimate tensile strength of TiO2 flux assisted weldments (885 MPa) was better compared to SiO2 flux assisted weldments (815 MPa) and the failure was observed in the parent metal for both the cases. Impact test results portrayed that both the weldments were inferior in toughness as compared to the parent metal, which was due to the presence of oxide inclusions. Also, the study investigated the structure-property relationships of the A-TIG weldments of Inconel 718. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：234 / 244

页数：11

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