Determining Ms temperature on a AISI D2 cold work tool steel using magnetic Barkhausen noise

作者：Huallpa Edgar Apaza^*; Capo Sanchez J; Padovese L R; Goldenstein Helio

来源：Journal of Alloys and Compounds, 2013, 577: S726-S730.

DOI：10.1016/j.jallcom.2012.02.032

• Martensitic transformation
• Ms temperature
• Magnetic Barkhausen Noise
• AISI D2
• Sub-zero temperatures

The use of Magnetic Barkhausen Noise (MBN) as a experimental method for measuring the martensite start (Ms) temperature was explored, using as model system a cold-work tool steel (AISI D2) austenitized at a very high temperature (1473 K), so as to transform in sub-zero temperatures. The progress of the transformation was also followed with electrical resistance measurements, optical microscopy and scanning electron microscopy. Both MBN and resistivity measurements showed a change near 230K during cooling, corresponding to the Ms temperature, as compared with 245 K, estimated with Andrews empirical equation applied to the austenite composition calculated using ThermoCalc.

• 出版日期2013-11-15