Back to Search
Start Over
A study of various heating effects on the microstructure and mechanical properties of AA6082 using EBSD and CPFE
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- The solution heat treatment (SHT) process resolving hardening precipitates in high strength aluminium alloys is a critical step for high-efficient forming processes, such as Hot Form Quench (HFQ®). SHT largely determines the overall cycle time of a forming process. However, effects of heating process parameters, such as the heating rate and soaking time, on the microstructure and the associated mechanical properties of aluminium alloy 6082, one of the most commonly used aluminium alloys, for HFQ applications, have not been systematically investigated. The aim of this study is to explore and understand the relationships among heat treatment conditions, grain microstructure and associated mechanical properties for AA6082. A series of uniaxial tensile tests conducted under various SHT conditions revealed significant variations on mechanical behaviour characterised by stress-strain curves. To correlate these stress-strain relationship with underlying microstructure, the grain and orientation distribution of each heat-treated sample were characterised by the electron backscatter diffraction (EBSD) technique. Due to the presence of a large number of microscopic variables, such as grain size, morphology, texture, grain boundary and etc., the crystal plasticity finite element (CPFE) modelling was employed to identify the key microscopic factors which determine the differences in the observed strength and ductility for all samples. A new CPFE model integrated with local strain criterion was proposed and validated to correlate the ductility and the strength with the material microstructure. This rigorous investigation provides more insights on how microstructure (grain size and texture) affects the mechanical behaviour for AA6082, which enables to enlarge the capability of HFQ for industrial applications.
- Subjects :
- Technology
Materials science
Materials Science
0204 Condensed Matter Physics
chemistry.chemical_element
Materials Science, Multidisciplinary
TEXTURE
02 engineering and technology
010402 general chemistry
01 natural sciences
FORMABILITY
Aluminium
DEFORMATION
Materials Chemistry
Aluminium alloy
Crystal plasticity finite element
Composite material
0912 Materials Engineering
Materials
Science & Technology
Solution heat treatment
ALUMINUM-ALLOYS
Chemistry, Physical
Mechanical Engineering
Aluminium alloy 6082
Metals and Alloys
Forming processes
0914 Resources Engineering and Extractive Metallurgy
Microstructure evolution
SHEET METALS
021001 nanoscience & nanotechnology
Microstructure
Grain size
BIAXIAL TESTING SYSTEM
0104 chemical sciences
MODEL
Chemistry
chemistry
Mechanics of Materials
visual_art
Physical Sciences
Hardening (metallurgy)
visual_art.visual_art_medium
Grain boundary
Metallurgy & Metallurgical Engineering
0210 nano-technology
BEHAVIOR
Electron backscatter diffraction
NUCLEATION
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....36242cfc641980707407ab020bcb98d5