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Microstructure and mechanical properties of resistance-spot-welded joints for A5052 aluminum alloy and DP 600 steel.
- Source :
-
Materials Characterization . Oct2016, Vol. 120, p45-52. 8p. - Publication Year :
- 2016
-
Abstract
- The microstructure and mechanical properties of resistance-spot-welded A5052 aluminum alloy and DP 600 dual-phase steel joint were studied. The fusion zone (FZ) and heat-affected zone (HAZ) of DP 600 exhibited lath martensite and ferrite-martensite structures, respectively. The microstructure of FZ and HAZ in the A5052 side was composed of cellular crystals and the boundary region of FZ exhibited a columnar crystal morphology. A Fe 2 Al 5 intermetallic compound (IMC) layer with 3.3 μm thickness was found adjacent to the DP 600 side, whereas a needle-shaped Fe 4 Al 13 IMC layer with length of 0.67 μm to 15.8 μm was found adjacent to the aluminum alloy side. The maximum tensile shear load of the A5052/DP 600 joint was 5.5 KN, with a corresponding molten nugget diameter of 6.3 mm. The fracture morphology of the optimized A5052/DP 600 joint was mainly an elongated dimple fracture accompanied by cleavage fracture. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10445803
- Volume :
- 120
- Database :
- Academic Search Index
- Journal :
- Materials Characterization
- Publication Type :
- Academic Journal
- Accession number :
- 118422464
- Full Text :
- https://doi.org/10.1016/j.matchar.2016.08.015