Journal
CIRP ANNALS-MANUFACTURING TECHNOLOGY
Volume 68, Issue 1, Pages 289-292Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cirp.2019.04.109
Keywords
Friction stir welding; Additive manufacturing; Heterogeneous microstructures
Funding
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [NRF-2015R1A5A1037627]
- Ministry of Trade, Industry and Energy (MOTIE)
- Korea Institute for Advancement of Technology (KIAT) through the Encouragement Program (R&D) for The Industries of Economic Cooperation Region [P0002115]
- Korea Evaluation Institute of Industrial Technology (KEIT) [P0002115] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Friction stir processing (FSP) is combined with additive manufacturing (AM) with selective laser melting to locally enhance the material properties of a metallic part. A groove inside aluminium 1060 alloy sheet is filled with an aluminium 7075 alloy powder by AM. FSP is then applied to the AMed region along the groove. The suggested technique creates a heterogeneous microstructure with alternating reinforcement-enriched and matrix-enriched regions. While the overall hardness of the stir zone (SZ) increases significantly, the heterogeneous microstructure results in a unique uneven hardness distribution in the SZ. Tensile tests confirm the effectiveness of the suggested technique. (C) 2019 Published by Elsevier Ltd on behalf of CIRP.
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