Improved Paint Baking Response of a Novel Al-Mg-Si Alloy Automotive Body Panels by Adding Zn Element and Pre-Ageing Matching

Zhi Hui Li; Li Zhen Yan; Yong An Zhang; Xi Wu Li; Feng Wang; Hong Wei Li; Bai Qing Xiong

doi:10.4028/www.scientific.net/MSF.783-786.509

Paper Titles

Microstructure Evolution of Mg-10Gd-2Y-0.5Zn-0.3Zr Alloy during Isothermal Forging Process
p.485

High Temperature Creep Behavior and Effects of Stacking Fault Energy in Mg-Y and Mg-Y-Zn Dilute Solid Solution Alloys
p.491

Recrystallization of AZ31 Alloy
p.497

Microstructural Characteristics and Mechanical Properties of Spray-Deposited Mg-Gd-Y-Zr Alloy
p.503

Improved Paint Baking Response of a Novel Al-Mg-Si Alloy Automotive Body Panels by Adding Zn Element and Pre-Ageing Matching
p.509

Relaxation of Misfit Dislocations at Nodes
p.515

Microstructure Change of AZCa912 Magnesium Alloy Continuous Casting Bar by Hot Compression
p.521

Twin Roll Casting (TRC) of Magnesium Alloys – Opportunities and Challenges
p.527

Twin Roll Casting and Rolling of New Mg-Wrought Alloys for Body Protective Safety Equipment
p.534

HomeMaterials Science ForumMaterials Science Forum Vols. 783-786Improved Paint Baking Response of a Novel Al-Mg-Si...

Improved Paint Baking Response of a Novel Al-Mg-Si Alloy Automotive Body Panels by Adding Zn Element and Pre-Ageing Matching

Abstract:

In the present work, the microstructure and properties of a novel Al-0.92Mg-0.78Si alloy with adding Zn element were investigated by electron back scattering diffraction (EBSD), transmission electron microscopy (TEM), high transmission electron microscopy (HREM), mechanical properties tests and Erichsen test. The alloy sheet was cold-rolled to about 1mm, then solution treated at 545 °C for 30mins, and immediately water quenched. After solution treatment, the alloy was pre-aged at 140 °C for 10mins. The average grain size of the alloy was about 20μm. The yield stress and elongation of pre-aged alloy was 137MPa and 30% respectively. The I_E value of the alloy was 8.6mm. After paint baking at 170 °C for 30mins, the increment of yield stress was about 100MPa. The GP(II) zones were formed in the alloy during paint baking process through adding Zn element, which should play a very important role for improving paint hardening response significantly. GP(II) zones and η ́ phases were formed after artificial ageing at 170 °C for 10h.