Microstructure Characteristics of Resistance Spot Welded High Al-Added Light Weight Steels

Yin Hua Jiang; Sheng Wei Ye; Yun Han; Yong Qiang Zhang; Bin Chen

doi:10.4028/www.scientific.net/MSF.1001.133

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HomeMaterials Science ForumMaterials Science Forum Vol. 1001Microstructure Characteristics of Resistance Spot...

Microstructure Characteristics of Resistance Spot Welded High Al-Added Light Weight Steels

Abstract:

Recently, the high Al-added light weight steels are particularly attractive for automotive applications because of their excellent mechanical properties and weight reduction. In this study, the microstructure characteristics and hardness in the resistance spot welding of high Al-added light weight steels were investigated. A Al-added 780MPa steel and Al-added 980MPa steel were used in the present study. For Al-added 780MPa steel the hardness in the weld nugget was higher than that of the base metal, and reduced hardness between the weld nugget and base metal is due to the presence of soft δ-ferrite. For Al-added 980MPa steel the hardness in the welt nugget was lower than that of the base metal due to grain growth.

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Periodical:

Materials Science Forum (Volume 1001)

Pages:

133-138

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.1001.133

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Online since:

July 2020

Authors:

Yin Hua Jiang*, Sheng Wei Ye, Yun Han, Yong Qiang Zhang, Bin Chen

Keywords:

Hardness, High Al-Added Light Weight Steel, Microstructure, Resistance Spot Welding

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