Abstract
This work offers an analysis of the microstructure and the growth rate of an intermetallic compound within the aged AA 6061 aluminum alloy-304 stainless steel joint brazed with Zn-15Al and Zn-15Al-0.2Zr filler metals. The effect of zirconium addition on mechanical integrity of the brazed joint was studied. The experimental results confirm that the thickness of the Fe-Al intermetallic layer formed at the brazed seam/stainless steel interface increases with the increase of the aging time. Furthermore, it is established that the growth rate of the intermetallic layer for the Zn-15Al-0.2Zr brazed joint was lower than that for Zn-15Al. The results also indicate that the shear strength of both Zn-15Al and Zn-15Al-0.2Zr brazed joints decreases monotonously during aging. The value of the strength after aging lasting for 800 h for Zn-15Al and Zn-15Al-0.2Zr has decreased by 20 and 17%, respectively. The fracture of joints occurred at the interface between the brazed seam and the Fe4Al13 intermetallic layer. The morphology of the surfaces exhibits a cleavage fracture.
Original language | English |
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Pages (from-to) | 358-365 |
Number of pages | 8 |
Journal | Journal of Materials Engineering and Performance |
Volume | 26 |
Issue number | 1 |
DOIs | |
State | Published - Jan 1 2017 |
Bibliographical note
Publisher Copyright:© 2016, ASM International.
Keywords
- aluminum
- brazed joint
- intermetallic compounds
- stainless steel
ASJC Scopus subject areas
- General Materials Science
- Mechanics of Materials
- Mechanical Engineering