Effects of post-weld heat treatment on the microstructural evolution and mechanical properties of dissimilar friction stir welded AA6061+SiCp/AA6061-O joint
| Autor: | Çinar Yeni, Binnur Goren Kiral, Nahit Öztoprak |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Equiaxed crystals
Materials science Friction Stir Welding Aerospace Engineering Ocean Engineering Mechanical Properties 02 engineering and technology Bending 01 natural sciences Indentation hardness Metal Matrix Composites Flexural strength 0103 physical sciences Ultimate tensile strength Friction stir welding Post-weld Heat Treatment General Materials Science Composite material Joint (geology) Civil and Structural Engineering 010302 applied physics Mechanical Engineering 021001 nanoscience & nanotechnology Microstructure Mechanics of Materials Automotive Engineering 0210 nano-technology |
| Zdroj: | Latin American Journal of Solids and Structures v.15 n.8 2018 Latin American journal of solids and structures Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM) instacron:ABCM Latin American Journal of Solids and Structures, Volume: 15, Issue: 8, Article number: e49, Published: 23 JUL 2018 |
| Popis: | A research on the microstructure and mechanical properties of the dissimilar joint was carried out so as to understand the effects of post-weld heat treatment (PWHT) on microstructural evolution, microhardness, tensile and flexural properties of the dissimilar friction stir welded (FSWed) joint. The results showed that there is a sufficient and rather complicated material mixing in the nugget zone (NZ). After PWHT, the grains in the joint area except for the NZ demonstrated a grain refinement with more homogeneous and equiaxed grains. Fine and clustered SiC particles in the NZ are confirmed by scanning electron microscope (SEM). In addition, the microhardness values of nugget zones both in as-welded and PWHT condition exhibited a higher Vickers compared to that of AA6061-O. Furthermore, a mean tensile strength of 183.30 MPa that demonstrates a 52.22% increase in tensile strength is also observed in the transverse tensile tests subsequent to PWHT. Considering the three-point bending test results, it is explicit that an increase of 121.96% in the bending extension is obtained as there is no significant increase in maximum bending force after the PWHT. |
| Databáze: | OpenAIRE |
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