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The local strength and toughness for stationary shoulder friction stir weld on AA6061-T6 alloy
- Source :
- Materials Characterization. 111:114-121
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- In this study, the local microstructure, strength and toughness of different zones in AA6061-T6 stationary shoulder friction stir welds were investigated. Results indicated that, the most significant weakening for both strength and toughness is found in HAZ that close to NZ. The microstructure of NZ includes recrystallized fine grains with high density of dislocations, homogeneous constituent particles distribution and re-precipitated of G.P. zones resulting in the recovery of local strength and the improvement for both plasticity and toughness. In HAZ, the grain structure and constituent particle distribution inherit the characteristics of base metal, but β″ precipitates are dissolved and the reprecipitated β′ particles are coarsened. This results in the decrease of yield strength, tensile strength, crack initial energy and propagation energy of HAZ, especially near NZ.
- Subjects :
- 0209 industrial biotechnology
Toughness
Materials science
Mechanical Engineering
Metallurgy
Alloy
02 engineering and technology
Welding
engineering.material
Plasticity
021001 nanoscience & nanotechnology
Condensed Matter Physics
Microstructure
law.invention
020901 industrial engineering & automation
Mechanics of Materials
law
Ultimate tensile strength
engineering
Particle
General Materials Science
Composite material
0210 nano-technology
Base metal
Subjects
Details
- ISSN :
- 10445803
- Volume :
- 111
- Database :
- OpenAIRE
- Journal :
- Materials Characterization
- Accession number :
- edsair.doi...........a20ba8c31ace8ca9bf1ccbc009a3593c