Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 21st International ESAFORM Conference on Material Forming, ESAFORM 2018 |
| Editors | Gianluca Buffa, Livan Fratini, Giuseppe Ingarao, Rosa Di Lorenzo |
| ISBN (electronic) | 9780735416635 |
| Publication status | Published - 3 May 2018 |
| Event | 21st International ESAFORM Conference on Material Forming, ESAFORM 2018 - Palermo, Italy Duration: 23 Apr 2018 → 25 Apr 2018 |
Publication series
| Name | AIP Conference Proceedings |
|---|---|
| Volume | 1960 |
| ISSN (Print) | 0094-243X |
| ISSN (electronic) | 1551-7616 |
Abstract
In the present study, heat-treatment assisted bonding of galfan-coated low-carbon steel sheets was investigated. Steel sheets were bonded by cold rolling subsequently to a heat treatment in the temperature range from 400°C to 550°C. The reduction ratio during cold rolling was varied in the range from 50% to 80%. Such high reduction ratios were achieved by splitting the bonding process into three stages. By employing heat-treatments, the mechanical properties of the bonds were improved. The heat-pretreatment allowed the formation of brittle intermetallic phases that were easily fractured in the rolling gap during the bonding process. Thus, juvenile non-oxidized surfaces were formed, which facilitated the bonding between the steel layers, and thus increased the bond strength. The intermetallic phases were actively formed at temperatures of 450°C and above; however increasing temperatures resulted in decreasing mechanical properties due to oxidation processes. The local microstructure was analyzed by scanning electron microscopy in order to characterize the contact zone on the micro level with a focus on the formation of intermetallic phases. The mechanical properties were determined in tensile shear tests. Interestingly, it was found that the galfan coating allowed for bonding at room temperature, and the aluminum fraction was primarily responsible for the enhanced oxide formation during the heat-pretreatment.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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Proceedings of the 21st International ESAFORM Conference on Material Forming, ESAFORM 2018. ed. / Gianluca Buffa; Livan Fratini; Giuseppe Ingarao; Rosa Di Lorenzo. 2018. 040007 (AIP Conference Proceedings; Vol. 1960).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Influence of Heat-Pretreatments on the Microstructural and Mechanical Properties of Galfan-Coated Metal Bonds
AU - Hordych, Illia
AU - Rodman, Dmytro
AU - Nürnberger, Florian
AU - Schmidt, Hans Christian
AU - Orive, Alejandro Gonzalez
AU - Homberg, Werner
AU - Grundmeier, Guido
AU - Maier, Hans Jürgen
N1 - Funding information: The authors thank the German Research Foundation (DFG) for financial support of project MA 1175/36-3 “Partial joining of blanks with electrochemical support (ECUF)” within the SPP 1640 framework. Special thanks go to Dr. M. Rodman and A. Hausmann for their assistance with the rolling experiments.
PY - 2018/5/3
Y1 - 2018/5/3
N2 - In the present study, heat-treatment assisted bonding of galfan-coated low-carbon steel sheets was investigated. Steel sheets were bonded by cold rolling subsequently to a heat treatment in the temperature range from 400°C to 550°C. The reduction ratio during cold rolling was varied in the range from 50% to 80%. Such high reduction ratios were achieved by splitting the bonding process into three stages. By employing heat-treatments, the mechanical properties of the bonds were improved. The heat-pretreatment allowed the formation of brittle intermetallic phases that were easily fractured in the rolling gap during the bonding process. Thus, juvenile non-oxidized surfaces were formed, which facilitated the bonding between the steel layers, and thus increased the bond strength. The intermetallic phases were actively formed at temperatures of 450°C and above; however increasing temperatures resulted in decreasing mechanical properties due to oxidation processes. The local microstructure was analyzed by scanning electron microscopy in order to characterize the contact zone on the micro level with a focus on the formation of intermetallic phases. The mechanical properties were determined in tensile shear tests. Interestingly, it was found that the galfan coating allowed for bonding at room temperature, and the aluminum fraction was primarily responsible for the enhanced oxide formation during the heat-pretreatment.
AB - In the present study, heat-treatment assisted bonding of galfan-coated low-carbon steel sheets was investigated. Steel sheets were bonded by cold rolling subsequently to a heat treatment in the temperature range from 400°C to 550°C. The reduction ratio during cold rolling was varied in the range from 50% to 80%. Such high reduction ratios were achieved by splitting the bonding process into three stages. By employing heat-treatments, the mechanical properties of the bonds were improved. The heat-pretreatment allowed the formation of brittle intermetallic phases that were easily fractured in the rolling gap during the bonding process. Thus, juvenile non-oxidized surfaces were formed, which facilitated the bonding between the steel layers, and thus increased the bond strength. The intermetallic phases were actively formed at temperatures of 450°C and above; however increasing temperatures resulted in decreasing mechanical properties due to oxidation processes. The local microstructure was analyzed by scanning electron microscopy in order to characterize the contact zone on the micro level with a focus on the formation of intermetallic phases. The mechanical properties were determined in tensile shear tests. Interestingly, it was found that the galfan coating allowed for bonding at room temperature, and the aluminum fraction was primarily responsible for the enhanced oxide formation during the heat-pretreatment.
UR - http://www.scopus.com/inward/record.url?scp=85047365640&partnerID=8YFLogxK
U2 - 10.1063/1.5034861
DO - 10.1063/1.5034861
M3 - Conference contribution
AN - SCOPUS:85047365640
T3 - AIP Conference Proceedings
BT - Proceedings of the 21st International ESAFORM Conference on Material Forming, ESAFORM 2018
A2 - Buffa, Gianluca
A2 - Fratini, Livan
A2 - Ingarao, Giuseppe
A2 - Di Lorenzo, Rosa
T2 - 21st International ESAFORM Conference on Material Forming, ESAFORM 2018
Y2 - 23 April 2018 through 25 April 2018
ER -