Improvement of hydrogen embrittlement by void formation at coating layers of Sb-added Al-Si-coated hot-press-forming steels

被引：10
作者：
Kim, Selim [1 ]
Song, Sang Yoon [2 ]
Kim, Sang-Heon [3 ]
Kim, Seongwoo [3 ]
Oh, Jinkeun [3 ]
Lee, Byeong-Joo [1 ]
Lee, Sunghak [4 ]
Kim, Nack J. [4 ]
Zargaran, Alireza [4 ]
Sohn, Seok Su [2 ]
机构：
[1] Pohang Univ Sci & Technol, Ctr Adv Aerosp Mat, Pohang 37673, South Korea
[2] Korea Univ, Dept Mat Sci & Engn, Seoul 02841, South Korea
[3] POSCO, Tech Res Labs, Steel Prod Res Grp, Kwangyang 57807, South Korea
[4] Pohang Univ Sci & Technol, Grad Inst Ferrous Technol, Pohang 37673, South Korea
来源：
CORROSION SCIENCE | 2023年 / 221卷
基金：
新加坡国家研究基金会;
关键词：
Hot-press-forming (HPF) steel; Hydrogen embrittlement (HE); Sb addition; Al-Si coating; Sb-enriched zone; Intrusion and emission of H atoms; HARDENED STEEL; DIFFUSION; SEGREGATION; FRACTURE; DESORPTION; ANTIMONY; MICROSTRUCTURE; PARAMETERS; TOUGHNESS; BEHAVIOR;
D O I：
10.1016/j.corsci.2023.111358
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Al-Si coating prevents the oxidation or decarburization of hot-press forming (HPF) steel. However, the high reactivity of Al with moisture promotes H uptake, and the coating hinders the out-diffusion of absorbed H atoms inside the steel, leading to hydrogen embrittlement (HE). This study added Sb to adjust Fe and Al/Si diffusivity, and forming H-trapping voids within the coating. Simultanesouly, these voids provided routes for the emission of H atoms, thereby improving the resistance to crack propagation during bending. The optimal design of the Al-Si coating by adjusting the Sb content and void fraction would enable extensive applications of HPF steel.
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页数：17
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