Abstract
The study on the liquid induced embrittlement in the as-welded six FeAl alloys was performed under constant applied loads using four-point beam bend apparatus. Exposure to two different liquid environments, i.e. relative humidity R.H. 98% water vapor and antirust oil WD40, was conducted. The weld metal in all FeAl alloys exhibits an excellent liquid embrittlement resistance greater than the base metals. The fractures in all FeAl alloy welds occurred at the base metal. The fractograph of WD40 induced brittlement is characterized by a transgranular cleavage fracture. However, the fractograph of R.H. 98% water vapor induced brittlement is characterized by an intergranular and transgranular mixed fracture mode.
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