Improvement of Paint Hardening Response of a Novel Al-Mg-Si Alloy for Automotive Panel by Adding Zn and Pre-Ageing Matching

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

doi:10.4028/www.scientific.net/AMR.936.1224

Paper Titles

Preparation of Ti-Fe Alloy from Titanium Concentrate by Electro-Deoxidization in CaCl₂
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Study on Atomic Mobility and Molar Volume for FCC Fe-Co Phase
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Molar Volume of Fcc Phase in the Ni-Cr-Mo System
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Effect of Aging Treatment on Phase Transformation of a Pseudoelastic NiTi Alloy
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Improvement of Paint Hardening Response of a Novel Al-Mg-Si Alloy for Automotive Panel by Adding Zn and Pre-Ageing Matching
p.1224

Effect of Mn and Si on the Microstructure and Mechanical Properties of Bearing Steel
p.1229

Influence of Nitrogen Atmosphere Annealing on Structural and Transport Properties of Fe_1.125Te
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Interface Reaction Thermodynamics of AgCuTi Brazing Filler Metal and Alumina Ceramic
p.1239

Influence of Deformation on Aging Precipitation Behavior of an Al-Cu-Mg-Si Alloy
p.1247

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Improvement of Paint Hardening Response of a Novel Al-Mg-Si Alloy for Automotive Panel by Adding Zn and Pre-Ageing Matching

Abstract:

In the present work, the microstructure and properties of a novel Al-0.90Mg-0.78Si alloy with Zn addition were investigated by electron back scattering diffraction (EBSD), high transmission electron microscopy (HREM), mechanical properties and Erichsen tests. The average grain size of the alloy after pre-ageing was about 20 μm. The yield strength and elongation of pre-aged alloy was 137 MPa and 30% respectively. The I_E value of the alloy was 8.6 mm. After paint baking at 170 °C for 30 min, the increment of yield strength was about 100 MPa. GP(II) zones were formed in the alloy during paint baking process through adding Zn, which should play a very important role for improving paint hardening response. GP(II) zones and η ́ phases were formed after artificial ageing at 170 °C for 10 h.