Evolution of microstructure and mechanical properties in 7B04-O Al friction stir processing
- Chen Y. ,
- Ding H. and
- Huang L.J.
- Chen Y. ,
- Ding H. and
- Huang L.J.
Links
Repository
Description
Friction stir processing (FSP) experiments were undertaken on 7B04-O aluminium alloys (Al, 6.23%Zn, 2.88%Mg, 1.58%Cu) and the evolution of microstructure and mechanical properties in the stir zone was investigated. FSP was conducted using a tool made from H13 tool steel at rotational speeds of 1600 rpm or 800 rpm and travel speed of 200 mm/min. Cross-sectional microstructure was observed by electron backscattered diffraction and TEM. Mechanical properties were characterised by Vickers microhardness measurement and transverse tensile tests at a crosshead speed of 1.5 mm/min. Differential scanning calorimetry test samples were cut from the stir zone and heated at a rate of 10 deg.C/min from room temperature to 500 deg.C. Issues discussed include equiaxed dynamically recrystallised grains in the stir zone, tunnel flaw formation under high heat input conditions and ageing precipitation and hardening behaviour in different weld zones.
10th International Symposium, 20-22 May 2014, Poster Session, Paper 03
Subjects
- Aluminium and Al alloys
- Nonferrous
- Material
- 7xxx Al series
- Microstructure
- Grain
- Surface engineering
- Process
- Friction stir processing
- Weld zone
- Weld
- Dynamically recrystallised zone
- Process conditions
- Mechanical properties
- Properties
- Hardness
- Strength
- Ultimate tensile strength
- Yield strength
- Heat treatment
Related Records
