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Control of surface micro−structure for Al alloy/polymer joining fabricated by laser process using Al−Ti−C powders: Effect of powder composition.

Control of surface micro−structure for Al alloy/polymer joining fabricated by laser process using Al−Ti−C powders: Effect of powder composition.

Authors :
Seung−Gwang Kim
Asuka Suzuki
Naoki Takata
Makoto Kobashi
Source :
Journal of Advanced Joining Processes, Vol 4, Iss , Pp 100068- (2021)
Publication Year :
2021
Publisher :
Elsevier, 2021.

Abstract

Surface micro−structure for joining with thermoplastic parts was additively manufactured on an aluminum alloy (A5052) substrate by laser scanning on Al−Ti−C powder mixtures. The micro−structure consisted of particle−shaped protrusions with a few hundred micrometers. The effect of C content in Al−Ti−C powder mixtures on the micro−structure and constituent phases was investigated. The fraction of particle−shaped protrusion reached maximum when the C/Ti molar ratio was 0.8. Adhesiveness between the particle−shaped protrusions and A5052 substrate decreased drastically when the C/Ti molar ratio increased from 0.6 to 0.8. Changes in these structural factors were related to the formation of TiC and Al3Ti phases after the laser−irradiations. The A5052 substrate was joined with Polyamide−6 sheets via the micro−structure by hot−pressing. When the C/Ti molar ratio was 0.6, the joint strength reached maximum since both the fraction of particle−shaped protrusions and adhesiveness between particle−shaped protrusions and A5052 substrate were high. The constitute phases (TiC and Al3Ti phases) in the micro−structures were assessed by Scheil simulation for Al−Ti−C system to calculate the component partitioning and solidification path during solidification. These results were used to discuss the relation between the surface micro−structure and powder compositions.

Details

Language :
English
ISSN :
26663309
Volume :
4
Issue :
100068-
Database :
Directory of Open Access Journals
Journal :
Journal of Advanced Joining Processes
Publication Type :
Academic Journal
Accession number :
edsdoj.1951e8b4cc3403b97485e2823bf38a5
Document Type :
article
Full Text :
https://doi.org/10.1016/j.jajp.2021.100068