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Laser-machined microchannel effect on microstructure and oxide formation of an ultrasonically processed aluminum alloy

Masurtschak, S.; Friel, R. J. LU ; Gillner, A.; Ryll, J. and Harris, R. A. (2015) In Journal of Engineering Materials and Technology, Transactions of the ASME 137(1).
Abstract

Ultrasonic consolidation (UC) has been proven to be a suitable method for fiber embedment into metal matrices. To aid successful embedment of high fiber volumes and to ensure their accurate positioning, research on producing microchannels in combination with adjacent shoulders formed by distribution of the melt onto unique UC sample surfaces with a fiber laser was carried out. This paper investigated the effect of the laser on the microstructure surrounding the channel within an Al 3003-H18 sample. The heat input and the extent of the heat-affected zone (HAZ) from one and multiple passes was examined. The paper explored the influence of air, as an assist gas, on the shoulders and possible oxide formation with regards to future bonding... (More)

Ultrasonic consolidation (UC) has been proven to be a suitable method for fiber embedment into metal matrices. To aid successful embedment of high fiber volumes and to ensure their accurate positioning, research on producing microchannels in combination with adjacent shoulders formed by distribution of the melt onto unique UC sample surfaces with a fiber laser was carried out. This paper investigated the effect of the laser on the microstructure surrounding the channel within an Al 3003-H18 sample. The heat input and the extent of the heat-affected zone (HAZ) from one and multiple passes was examined. The paper explored the influence of air, as an assist gas, on the shoulders and possible oxide formation with regards to future bonding requirements during UC. The authors found that one laser pass resulted in a keyhole-shaped channel filled with a mixture of aluminum and oxides and a symmetrical HAZ surrounding the channel. Multiple passes resulted in the desired channel shape and a wide HAZ which appeared to be an eutectic microstructure. The distribution of molten material showed oxide formation all along the channel outline and especially within the shoulder.

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author
publishing date
type
Contribution to journal
publication status
published
in
Journal of Engineering Materials and Technology, Transactions of the ASME
volume
137
issue
1
publisher
The American Society of Mechanical Engineers
external identifiers
  • scopus:84993967475
ISSN
0094-4289
DOI
10.1115/1.4028926
language
English
LU publication?
no
id
4c562ad5-c60b-4bdf-ad0c-8589a3520ac0
date added to LUP
2017-01-23 09:49:05
date last changed
2017-08-01 13:36:05
@article{4c562ad5-c60b-4bdf-ad0c-8589a3520ac0,
  abstract     = {<p>Ultrasonic consolidation (UC) has been proven to be a suitable method for fiber embedment into metal matrices. To aid successful embedment of high fiber volumes and to ensure their accurate positioning, research on producing microchannels in combination with adjacent shoulders formed by distribution of the melt onto unique UC sample surfaces with a fiber laser was carried out. This paper investigated the effect of the laser on the microstructure surrounding the channel within an Al 3003-H18 sample. The heat input and the extent of the heat-affected zone (HAZ) from one and multiple passes was examined. The paper explored the influence of air, as an assist gas, on the shoulders and possible oxide formation with regards to future bonding requirements during UC. The authors found that one laser pass resulted in a keyhole-shaped channel filled with a mixture of aluminum and oxides and a symmetrical HAZ surrounding the channel. Multiple passes resulted in the desired channel shape and a wide HAZ which appeared to be an eutectic microstructure. The distribution of molten material showed oxide formation all along the channel outline and especially within the shoulder.</p>},
  articleno    = {011006},
  author       = {Masurtschak, S. and Friel, R. J. and Gillner, A. and Ryll, J. and Harris, R. A.},
  issn         = {0094-4289},
  language     = {eng},
  number       = {1},
  publisher    = {The American Society of Mechanical Engineers},
  series       = {Journal of Engineering Materials and Technology, Transactions of the ASME},
  title        = {Laser-machined microchannel effect on microstructure and oxide formation of an ultrasonically processed aluminum alloy},
  url          = {http://dx.doi.org/10.1115/1.4028926},
  volume       = {137},
  year         = {2015},
}