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 language | English |
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Title of host publication | Advances in Pre- and Post-Additive Manufacturing Processes |
Subtitle of host publication | Innovations and Applications |
Publisher | CRC Press |
Pages | 137-162 |
Number of pages | 26 |
ISBN (Electronic) | 9781040047644 |
ISBN (Print) | 9781032549873 |
DOIs | |
State | Published - 1 Jan 2024 |
Externally published | Yes |
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