Liquid metal embrittlement of an Fe10Cr4Al ferritic alloy exposed to oxygen-depleted and -saturated lead-bismuth eutectic at 350°C. (1st April 2020)

• Record Type: Journal Article
• Authors: Gong, Xing; Chen, Jiajun; Hu, Feiyu; Xiang, Congying; Yu, Zhiyang; Xiao, Jun; Wang, Hui; Gong, Haoran; Wang, Hao; Liu, Chaohong; Deng, Yangbin; Pang, Bo; Huang, Xi; Li, Yongchun; Yin, Yuan
• Is Part Of: Corrosion science. Volume 165(2020)
• Publication Date: 2020-04-01
• Subjects: Lead-bismuth eutectic (LBE) -- Liquid metal embrittlement -- Fe10Cr4Al -- Cleavage -- Intergranular cracking; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2019.108364
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: The LME susceptibility of Fe10Cr4Al was tested in LBE at 350 °C. This alloy is highly susceptible to LME. Surface oxides can delay LME. LME-induced fracture is dominated by cleavage and intergranular cracking. Abstract: Liquid metal embrittlement (LME) of an Fe10Cr4Al (wt%) ferritic alloy was tested in lead-bismuth eutectic (LBE) at 350 °C using slow strain rate tensile tests. The results show that this alloy is highly susceptible to LME. The strong LME effect is manifested by a substantial reduction in ductility and completely cleaved fracture surfaces. Transgranular cleavage and intergranular cracking are the major fracture modes. The LME susceptibility is slightly weaker in oxygen-saturated LBE than oxygen-depleted LBE due to the presence of a double-layer scale consisting of magnetite and Al-rich spinel. The oxide scale is fragmented, indicative of a brittle nature.