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- Title
Improving the particle distribution and mechanical properties of friction-stir-welded composites by using a smooth pin tool.
- Authors
Liu, Huijie; Hu, Yanying; Zhao, Yunqiang; Fujii, Hidetoshi
- Abstract
Friction stir welding (FSW) is a very promising technique for joining particle-reinforced aluminum-matrix composites (PRAMCs), but with increase in the volume fraction of reinforcing particles, their distribution in welds becomes inhomogeneous. This leads to an inconsistent deformation of welds and their destruction at low stresses. In order to improve the weld microstructure, a smooth pin tool was used for the friction stir welding of AC4A + 30 vol.% SiC particle-reinforced aluminum-matrix composites. The present work describes the effect of welding parameters on the characteristics of particle distribution and the mechanical properties of welds. The ultimate strength of weld reached, 309 MPa, was almost 190% of that of the basic material. The mechanism of SiC particle conglomeration is clearly illustrated by means of schematic illustrations.
- Subjects
COMPOSITE materials testing; FRICTION stir welding testing; PARTICLE size distribution; MECHANICAL behavior of materials; ALUMINUM composites; SILICON carbide
- Publication
Mechanics of Composite Materials, 2017, Vol 53, Issue 4, p515
- ISSN
0191-5665
- Publication type
Article
- DOI
10.1007/s11029-017-9681-9