The evaluation of hot crack susceptibility of Fe30Mn10AlXC weld metal by using varestraint test

Chou, Chang‐Pin; Lee, Chien-Hsun

doi:10.1016/0036-9748(89)90309-8

Cited by 5 publications

(1 citation statement)

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“…Hull has suggested that the weld metals containing residual ferrite in amounts between 5 and 30 % at ambient temperature showed excellent resistance to solidification cracking in stainless steel [20]. Chou et al noted that the weld microstructures with 25-30 % residual ferrite were shown to provide optimum resistance to solidification cracking in Fe-30Mn-10Al-xC alloys [21]. It is evident that the volume percent of ferrite detected at ambient temperature is not directly correlated to the cracking susceptibility.…”

Section: Microsegregation Of Alloying Elementsmentioning

confidence: 99%

Microstructural evolution and solidification cracking susceptibility of Fe–18Mn–0.6C–xAl steel welds

et al. 2014

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In this work, the solidification behavior and solidification cracking of Fe-18Mn-0. 2.37, 4.79,6.04 wt%) alloys were investigated. A longitudinal Varestraint test was applied to evaluate the solidification cracking tendency of Al-added high-Mn steel welds. In terms of total crack length and maximum crack length at 4 % applied strain, the solidification cracking susceptibility of high-Mn steel decreased with increasing Al content. Addition of Al suppressed the formation of low melting point eutectics (c ? (Fe,Mn) 3 C) along the grain boundaries during the final stage of solidification, which resulted in the decrease of solidification cracking tendency. The Al segregated extensively to the dendrite core opposite to Mn and C during solidification, which promoted the formation of d ferrite. Further, the transition of the solidification sequence from the primary austenitic to primary ferritic mode provided a noticeable improvement in solidification cracking resistance in high-Mn steel welds similar to austenitic stainless steel welds.

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Section: Microsegregation Of Alloying Elementsmentioning

confidence: 99%