Relationship between heat input and microstructure and mechanical properties of laser beam welded superalloy inconel 718

Akin Odabaşi*, Necip Ünlü, Gültekin Göller, M. Niyazi Eruslu, E. Sabri Kayali

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Autogenous butt, laser beam welds were carried out using Inconel 718 alloy sheets (2.1 mm thick). The relationship between heat input laser beam welding (LBW) and the microstructural and mechanical properties of superalloy Inconel 718 were investigated. Nine different heat inputs in the range of 61.29-90.09 Jmm-1 were applied to evaluate the geometry of weld seams. Full penetration was achieved in all weld experiments. Optical and field emission scanning electron microscopy and microhardness tests were performed. Test results indicate that increasing the amount of heat input from 61.29 Jmm -1 to 90.09 Jmm-1 presented solidification rates between 1.27×105 and 1.46×106°Cs-1. The hardness property of the weld samples decreased with the increasing the heat input.

Original languageEnglish
Title of host publicationMaterials Processing and Interfaces
PublisherMinerals, Metals and Materials Society
Pages199-205
Number of pages7
ISBN (Print)9781118296073
DOIs
Publication statusPublished - 2012
Event141st Annual Meeting and Exhibition, TMS 2012 - Orlando, FL, United States
Duration: 11 Mar 201215 Mar 2012

Publication series

NameTMS Annual Meeting
Volume1

Conference

Conference141st Annual Meeting and Exhibition, TMS 2012
Country/TerritoryUnited States
CityOrlando, FL
Period11/03/1215/03/12

Keywords

  • Hardness
  • Inconel 718
  • Laser welding
  • Solidification rate

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