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Investigation on Surface Hardness and Microstructure Evolution in AA 7075-T651 Multi-Layered Laminate Fabricated Through Friction Stir Additive Manufacturing.

Authors :
Hassan, Adeel
Awang, Mokhtar
Pedapati, Srinivasa Rao
Altaf, Khurram
Ahmed, Naveed
Marode, Roshan Vijay
Ahmed, Syed Waqar
Soomro, Imtiaz Ali
Source :
Iranian Journal of Materials Science & Engineering; Dec2023, Vol. 20 Issue 4, p1-12, 12p
Publication Year :
2023

Abstract

Friction stir additive manufacturing (FSAM) is a variant of sheet lamination additive manufacturing used to produce large, near-net-shaped 3D parts. Unlike traditional friction stir lap welding, FSAM introduces a new plate to one that is already joined, with the effective area limited to the nugget zone. The present study focuses on exploring the microstructure and microhardness around the nugget zone in a five-plate AA 7075-T651 laminate synthesized at 1000 rpm and 35 mm/min. Microhardness increased vertically in the weldment NZ, reaching 143 HV in the top layer with 2.0 µm fine equiaxed grains. The grains on the advancing and retreating sides were coarser compared to the nugget zone. A W-shaped microhardness profile appeared across layer interfaces. These findings contribute significantly to advancing the FSAM technique, particularly in manufacturing multi-layered, multi-pass laminates. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
17350808
Volume :
20
Issue :
4
Database :
Complementary Index
Journal :
Iranian Journal of Materials Science & Engineering
Publication Type :
Academic Journal
Accession number :
174728948
Full Text :
https://doi.org/10.22068/ijmse.3361