Effect of Interlayer Temperatures and Heat Inputs on Porosity and Hydrogen Solubility in Wire Arc Additive Manufactured AA2618 Aluminium: A Comparative Study between Pulsed-MIG and CMT Methods

P. Satishkumar, Barun Haldar, Naveen Mani Tripathi, Ankit Sharma, Dhaval Jaydevkumar Desai, Vijay Kumar Sharma Seenivasan, Atul Babbar

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

The aim of this study is to examine the challenges of porosity in wire arc additive manufactured (WAAM) AA 2618. It was found that interlayer temperatures and heat inputs play critical roles in determining the distribution of porosity and hydrogen solubility within the solid metal. Two WAAM methods, cold metal transfer (CMT), and pulsed-Metal Inert Gas (pulsed-MIG) were investigated. Pulsed-MIG specimens showed a higher absorption of hydrogen compared to CMT specimens. Moreover, under various heat inputs and interlayer temperatures, pulsed-Metal Inert Gas specimens displayed more pores and a larger volume fraction of porosity than their CMT counterparts. However, CMT specimens had more dissolved hydrogen in their solid solution than pulsed-MIG specimens. Factors like heat input, interlayer temperature, and the interlayer dwell time also significantly influenced the formation and dispersal of pores in the AA2618-made WAAM.

Original languageEnglish
Title of host publicationAdvances in Pre- and Post-Additive Manufacturing Processes
Subtitle of host publicationInnovations and Applications
PublisherCRC Press
Pages137-162
Number of pages26
ISBN (Electronic)9781040047644
ISBN (Print)9781032549873
DOIs
StatePublished - 1 Jan 2024
Externally publishedYes

ASJC Scopus subject areas

  • General Arts and Humanities
  • General Business, Management and Accounting
  • General Biochemistry, Genetics and Molecular Biology
  • General Engineering
  • General Social Sciences
  • General Materials Science

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