Details
| Original language | English |
|---|---|
| Title of host publication | High-Power Laser Materials Processing |
| Subtitle of host publication | Applications, Diagnostics, and Systems IX |
| Editors | Stefan Kaierle, Stefan W. Heinemann |
| Publisher | SPIE |
| ISBN (electronic) | 9781510633094 |
| Publication status | Published - 2 Mar 2020 |
| Event | SPIE LASE - San Francisco, California, United States Duration: 1 Feb 2020 → 6 Feb 2020 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 11273 |
| ISSN (Print) | 0277-786X |
| ISSN (electronic) | 1996-756X |
Abstract
Laser beam welding is a necessary and helpful tool in modern production technology. It provides low and located heat input, narrow weld widths, high welding speeds and weld depths. Nevertheless, in the weld metal and the surrounding area the microstructure and the mechanical characteristics can be changed afterwards. A decrease of strength and fatigue life is a possible result. To realize a manipulation or control of the weld metal's microstructure during the welding process is a great challenge. Improving the strength as well as the homogeneity of mechanical properties and chemical composition are the aims of this approach. With indirect introduced ultrasonic amplitudes, the weld pool dynamics and the solidification are affected. The investigation focusses on the effects in the microstructure of high power (8 kW) laser beam welded stainless steel (AISI 304) with weld depths up to 15 mm. For two different amplitudes (3 and 6 μm) and three different positions of the weld pool in the vibration distribution (antinode, centered and node position) the weld metal is evaluated with metallographic cross sections. The types and the amount of microstructures are analyzed. The solidification of the weld metal is influenced by the vibration. Thus, the orientation, size and growth of the grains as well as the growth direction are changed. Furthermore, the weld characteristics (weld depth, weld width, weld area) are compared to the previously considered aspects.
Keywords
- AISI 304, Laser beam welding, Microstructure, Stainless steel, Ultrasound
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
- Computer Science(all)
- Computer Science Applications
- Mathematics(all)
- Applied Mathematics
- Engineering(all)
- Electrical and Electronic Engineering
Cite this
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- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
High-Power Laser Materials Processing: Applications, Diagnostics, and Systems IX. ed. / Stefan Kaierle; Stefan W. Heinemann. SPIE, 2020. 112730J (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11273).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Investigations on the effect of different ultrasonic amplitudes and positions in the vibration distribution on the microstructure of laser beam welded stainless steel
AU - Nothdurft, Sarah
AU - Ohrdes, Hendrik
AU - Twiefel, Jens
AU - Wallaschek, Jörg
AU - Hermsdorf, Jörg
AU - Overmeyer, Ludger
AU - Kaierle, Stefan
N1 - Funding Information: The results presented in this publication were obtained from the Collaborative Research Centre 1153 “Process chain to produce hybrid high performance components with Tailored Forming” in subproject A3. The authors would like to thank the German Research Foundation (DFG) for the financial and organizational support of this project.
PY - 2020/3/2
Y1 - 2020/3/2
N2 - Laser beam welding is a necessary and helpful tool in modern production technology. It provides low and located heat input, narrow weld widths, high welding speeds and weld depths. Nevertheless, in the weld metal and the surrounding area the microstructure and the mechanical characteristics can be changed afterwards. A decrease of strength and fatigue life is a possible result. To realize a manipulation or control of the weld metal's microstructure during the welding process is a great challenge. Improving the strength as well as the homogeneity of mechanical properties and chemical composition are the aims of this approach. With indirect introduced ultrasonic amplitudes, the weld pool dynamics and the solidification are affected. The investigation focusses on the effects in the microstructure of high power (8 kW) laser beam welded stainless steel (AISI 304) with weld depths up to 15 mm. For two different amplitudes (3 and 6 μm) and three different positions of the weld pool in the vibration distribution (antinode, centered and node position) the weld metal is evaluated with metallographic cross sections. The types and the amount of microstructures are analyzed. The solidification of the weld metal is influenced by the vibration. Thus, the orientation, size and growth of the grains as well as the growth direction are changed. Furthermore, the weld characteristics (weld depth, weld width, weld area) are compared to the previously considered aspects.
AB - Laser beam welding is a necessary and helpful tool in modern production technology. It provides low and located heat input, narrow weld widths, high welding speeds and weld depths. Nevertheless, in the weld metal and the surrounding area the microstructure and the mechanical characteristics can be changed afterwards. A decrease of strength and fatigue life is a possible result. To realize a manipulation or control of the weld metal's microstructure during the welding process is a great challenge. Improving the strength as well as the homogeneity of mechanical properties and chemical composition are the aims of this approach. With indirect introduced ultrasonic amplitudes, the weld pool dynamics and the solidification are affected. The investigation focusses on the effects in the microstructure of high power (8 kW) laser beam welded stainless steel (AISI 304) with weld depths up to 15 mm. For two different amplitudes (3 and 6 μm) and three different positions of the weld pool in the vibration distribution (antinode, centered and node position) the weld metal is evaluated with metallographic cross sections. The types and the amount of microstructures are analyzed. The solidification of the weld metal is influenced by the vibration. Thus, the orientation, size and growth of the grains as well as the growth direction are changed. Furthermore, the weld characteristics (weld depth, weld width, weld area) are compared to the previously considered aspects.
KW - AISI 304
KW - Laser beam welding
KW - Microstructure
KW - Stainless steel
KW - Ultrasound
UR - http://www.scopus.com/inward/record.url?scp=85083291928&partnerID=8YFLogxK
U2 - 10.1117/12.2566035
DO - 10.1117/12.2566035
M3 - Conference contribution
AN - SCOPUS:85083291928
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - High-Power Laser Materials Processing
A2 - Kaierle, Stefan
A2 - Heinemann, Stefan W.
PB - SPIE
T2 - SPIE LASE
Y2 - 1 February 2020 through 6 February 2020
ER -