Stable production of dissimilar steel joints in construction machinery by narrow gap oscillating laser welding

Fan, Yu; Cao, Jian; Zhang, Jun; zhao, Yong; Fang, Rongchao; Wang, Yeqing; Chen, Zheng

doi:10.1016/j.jmrt.2024.03.126

Cited by 2 publications

(1 citation statement)

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“…One advantage of using magnesium alloys in applications in automotive, rail transit, and aerospace industries is their lightweight because magnesium alloys show characteristics of low density and high specific strength and provide a satisfactory electric shielding effect [1][2][3]. But the requirement for resistance to oxidation, resistance to corrosion, and heat stabilization has been proposed as magnesium alloys show high chemical and electrochemical activity characteristics [4][5][6][7]. In addition, the oxide products of magnesium alloys, mainly consisting of MgO with a Pilling-Bedworth ratio of less than 1, show poor film formation and limited protection for the matrix [8].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Unveiling of the Oxidation Resistance and Corrosion Protection of an Oxide Layer Formed on the Gd-Alloyed AZ80 Alloy Surface

Cheng,

Zhou,

et al. 2024

Metals

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In our previous work, the effect of Gd alloying on the oxidation resistance of AZ80 alloy was revealed briefly. However, a comprehensive understanding of the oxidation and corrosion resistance of the oxide layer formed on the Gd alloying AZ80 alloy surface needs to be developed. Thus, in this research, the high-temperature oxidation behaviors, oxidation products, and oxide layer characteristics of AZ80, AZ80-0.47Gd, and AZ80-0.75Gd (wt%) alloys were investigated at 420 °C. The corrosion protection of the oxide layer formed on the alloy surface was evaluated. The results showed that Gd alloying eliminated the content of the low melting point phase of β-Mg17Al12 and promoted the generation of a high melting point phase of Al2Gd. Gd2O3 appeared in the oxide layer and facilitated the propagation of homogeneous oxidation as well as densification of the oxide layer. In addition, the firm oxide layer showed characteristics of a blurred boundary with the magnesium matrix. After immersion of the oxide layer containing gadolinium oxide, the products of corrosion were massively nodulated, leading to the passivation of corrosion. This research provides new ideas for magnesium alloy protective layer preparation via a high-temperature oxidation technique.

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