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Nagasai, B. Prasanna
- Porosity and metallurgical characteristics of AA5356 aluminum alloy cylindrical components made by wire arc additive manufacturing process
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Authors
Affiliations
1 Centre for Materials Joining & Research (CEMAJOR), Annamalai University, Annamalainagar, Tamilnadu, India, IN
1 Centre for Materials Joining & Research (CEMAJOR), Annamalai University, Annamalainagar, Tamilnadu, India, IN
Source
Manufacturing Technology Today, Vol 21, No 7-8 (2022), Pagination: 3-12Abstract
AA5356 (Al-Mg) alloys can reach medium strength without a solid solution and quenching treatment, thereby avoiding product distortion caused by quenching, which has attracted the attention of wire arc additive manufacturing (WAAM) researchers. However, challenges during the additive manufacturing of aluminum alloys, such as porosity or poor mechanical properties, can be overcome by using arc technologies with low heat input. This paper presents metallurgical characteristics and mechanical properties of wire arc additive manufactured AA5356 alloy cylindrical components fabricated by Gas Metal Arc Welding (GMAW) and Cold Metal Transferred (CMT) arc welding processes. Herein, comparison between the welding processes and the resulting heat input show the effect on resulting microstructural characteristics of additively manufactured AA5356 parts. Firstly, the influence of heat input on the porosity was analyzed. Subsequently, the effect of heat input on the microstructural characteristics of the components was studied. The component produced by CMT process exhibits fewer and smaller pores with finer grains and reduced segregation of β-(Al3Mg2) phases than the GMAW process.Keywords
Wire Arc Additive Manufacturing, Al-Mg Alloy, Porosity, Metallurgical Characteristics.
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