Details
| Translated title of the contribution | Simulation of columnar crystallite formation in brazed seams of copper-brazed carbon steels |
|---|---|
| Original language | German |
| Pages (from-to) | 164-168 |
| Number of pages | 5 |
| Journal | Materialwissenschaft und Werkstofftechnik |
| Volume | 38 |
| Issue number | 2 |
| Early online date | 19 Feb 2007 |
| Publication status | Published - Feb 2007 |
Abstract
When brazing steels of different carbon content with copper filler metal, columnar crystallites form on the carbon-rich iron surface if the width of the brazing gap is smaller than 100 μm. Braze seams with such microstructures were described as early as the 1950ies and it was found out, that the strength of such a joint is significant enhanced, if this crystallites penetrate the entire seam. Extensive experimental investigations in recent years confirm, that the final average length of the crystallite increases superproportionally with decreasing brazing gap width and is almost inversely proportional to the difference in carbon content of the joined steels. Although many attempts to explain this phenomenon are known from literature, the mechanism of columnar structure formation has not been clarified properly until now. The aim of the present work was to develop an appropriate physical model, that describes the growth of crystallites as a function of carbon content in the base materials, the initial brazing gap width and the applied process parameters (temperature, time). The model is an appropriate tool for a general choice and development of filler metal-base material combinations forming columnar crystallites in the braze seam.
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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In: Materialwissenschaft und Werkstofftechnik, Vol. 38, No. 2, 02.2007, p. 164-168.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Modellierung der Stängelkristallitbildung beim Hartlöten von Kohlenstoffstählen mit Kupfer
AU - Bach, Fr W.
AU - Möhwald, K.
AU - Holländer, U.
AU - Nicolaus, M.
PY - 2007/2
Y1 - 2007/2
N2 - When brazing steels of different carbon content with copper filler metal, columnar crystallites form on the carbon-rich iron surface if the width of the brazing gap is smaller than 100 μm. Braze seams with such microstructures were described as early as the 1950ies and it was found out, that the strength of such a joint is significant enhanced, if this crystallites penetrate the entire seam. Extensive experimental investigations in recent years confirm, that the final average length of the crystallite increases superproportionally with decreasing brazing gap width and is almost inversely proportional to the difference in carbon content of the joined steels. Although many attempts to explain this phenomenon are known from literature, the mechanism of columnar structure formation has not been clarified properly until now. The aim of the present work was to develop an appropriate physical model, that describes the growth of crystallites as a function of carbon content in the base materials, the initial brazing gap width and the applied process parameters (temperature, time). The model is an appropriate tool for a general choice and development of filler metal-base material combinations forming columnar crystallites in the braze seam.
AB - When brazing steels of different carbon content with copper filler metal, columnar crystallites form on the carbon-rich iron surface if the width of the brazing gap is smaller than 100 μm. Braze seams with such microstructures were described as early as the 1950ies and it was found out, that the strength of such a joint is significant enhanced, if this crystallites penetrate the entire seam. Extensive experimental investigations in recent years confirm, that the final average length of the crystallite increases superproportionally with decreasing brazing gap width and is almost inversely proportional to the difference in carbon content of the joined steels. Although many attempts to explain this phenomenon are known from literature, the mechanism of columnar structure formation has not been clarified properly until now. The aim of the present work was to develop an appropriate physical model, that describes the growth of crystallites as a function of carbon content in the base materials, the initial brazing gap width and the applied process parameters (temperature, time). The model is an appropriate tool for a general choice and development of filler metal-base material combinations forming columnar crystallites in the braze seam.
KW - Brazing
KW - Carbon steel
KW - Columnar crystallites
KW - Copper filler metal
KW - Joining
UR - http://www.scopus.com/inward/record.url?scp=33847768808&partnerID=8YFLogxK
U2 - 10.1002/mawe.200600104
DO - 10.1002/mawe.200600104
M3 - Artikel
AN - SCOPUS:33847768808
VL - 38
SP - 164
EP - 168
JO - Materialwissenschaft und Werkstofftechnik
JF - Materialwissenschaft und Werkstofftechnik
SN - 0933-5137
IS - 2
ER -