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Weakening mechanism and tensile fracture behavior of AA 2219-T87 friction plug welds
- Source :
- Materials Science and Engineering: A. 693:129-135
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- In this paper, the weakening mechanism and tensile fracture behavior of AA 2219-T87 friction plug weld were investigated. The as welded friction plug joint involves six regions of plug metal (PM), plug thermo-mechanically affected zone (PTMAZ), recrystallized zone (RZ), thermo-mechanically affected zone (TMAZ), heat affected zone (HAZ), and base metal (BM). Owing to the severe material flow and plastic deformation at high welding temperatures, dynamic recrystallization would occur near the bonding interface. In TMAZ and HAZ, dissolution of θ′ phase, θ′ to θ transformation and coarsening of θ particles are observed. Throughout the weld, the minimum hardness value 87Hv is found in TMAZ near RZ. During tensile process, the initial strain concentration generates in TMAZ, and then intensifies and extends until eventual fracture of the joint. The fracture morphology of the joint is characterized by large and shallow dimples with second phases.
- Subjects :
- 0209 industrial biotechnology
Heat-affected zone
Materials science
Mechanical Engineering
Metallurgy
02 engineering and technology
Welding
Condensed Matter Physics
law.invention
020303 mechanical engineering & transports
020901 industrial engineering & automation
0203 mechanical engineering
Mechanics of Materials
law
Dimple
Ultimate tensile strength
Fracture (geology)
Dynamic recrystallization
General Materials Science
Spark plug
Joint (geology)
Subjects
Details
- ISSN :
- 09215093
- Volume :
- 693
- Database :
- OpenAIRE
- Journal :
- Materials Science and Engineering: A
- Accession number :
- edsair.doi...........382647fc06eb0f30854f2ba228bb819b