Effect of Hydrogen Content on Impact Property of A357 Alloy

Abstract:

The impact specimens with different hydrogen contents were solution treated at 540±3°C for 12h; water quenched at 60-100°C; and aged at 165±1°C for 6h. The impact test was carried out at Roell450 pendulum impact testing machine. The impact test results show that the impact energy has strong relation with the hydrogen content. The total absorption energy increases with the increasing of hydrogen content. The crack propagation energy A_vp and present larger proportion than the initial crack energy A_vi in the total absorption energy A_v. The number of the pinholes increases and the pinholes turn from smaller irregular ones into sub-circular shape ones. The specimen with irregular sub-circular pinholes has larger K_I, and has more crack propagation resistance.

• Periodical: Materials Science Forum (Volumes 704-705)
• Pages: 1201-1204
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.704-705.1201
• Online since: December 2011
• Authors: Yang Li, Zheng Bing Xu, Jian Min Zeng
• Keywords: A357 Aluminum Alloy, Hydrogen Content, Impact Energy, Pinhole

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