Magnetic hysteresis loop technique as a tool for the evaluation of σ phase embrittlement in Fe-Cr alloys

► MHL technique to detect small volume fraction of σ phase in Fe-Cr alloys. ► Estimation of volume fraction of σ phase from maximum induction. ► Remanence is a suitable parameter for the detection of σ phase. ► MHL technique can detect 1% of σ phase in Fe-Cr alloys. ► MHL is a powerful NDE technique for detecting σ phase embrittlement in Fe-Cr alloys.