Comparative study of eddy current and Barkhausen noise nondestructive testing methods in microstructural examination of ferrite–martensite dual-phase steel

Abstract The magnetic properties of ferrite–martensite dual-phase steels were evaluated using eddy current and Barkhausen noise nondestructive testing methods and correlated with their microstructural changes. Several routes were used to produce different microstructures of dual-phase steels. The first route was different heat treatments in γ region to vary the ferrite grain size (from 9.47 to 11.12 in ASTM number), and the second one was variation in intercritical annealing temperatures (from 750 to 890 °C) in order to produce different percentages of martensite in dual-phase microstructure. The results concerning magnetic Barkhausen noise are discussed in terms of height, position and shape of Barkhausen noise profiles, taking into account two main aspects: ferrite grain size, and different percentages of martensite. Then, eddy current testing was used to study the mentioned microstructural changes by detection of impedance variations. The obtained results show that microstructural changes have a noticeable effect on the magnetic properties of dual-phase steels. The results reveal that both magnetic methods have a high potential to be used as a reliable nondestructive tool to detect and monitor microstructural changes occurring during manufacturing of dual-phase steels.

[1]  Toshiyuki Takagi,et al.  Characterization of ductile cast iron by eddy current method , 2005 .

[2]  S. Kahrobaee,et al.  Magnetic NDT Technology for characterization of decarburizing depth , 2011 .

[3]  D. Atherton,et al.  The influence of pearlite on barkhausen noise generation in plain carbon steels , 1991 .

[4]  V. Moorthy,et al.  Evaluation of tempering induced changes in the hardness profile of case-carburised EN36 steel using magnetic Barkhausen noise analysis , 2003 .

[5]  Wuliang Yin,et al.  Exploring the relationship between ferrite fraction and morphology and the electromagnetic properties of steel , 2007 .

[6]  G. P. Chaudhari,et al.  Mechanical and corrosion behavior of plain low carbon dual-phase steels , 2011 .

[7]  Zhongming Ren,et al.  Effect of water quenching process on the microstructure and magnetic property of cold rolled dual phase steel , 2010 .

[8]  Xavier E. Gros,et al.  An eddy current approach to the detection of damage caused by low-energy impacts on carbon fibre reinforced materials , 1995 .

[9]  G. Thomas,et al.  Effects of morphology on the mechanical behavior of a dual phase Fe/2Si/0.1C steel , 1981 .

[10]  Mehrdad Kashefi,et al.  Application of eddy current nondestructive method for determination of surface carbon content in carburized steels , 2009 .

[11]  A. N. Khan,et al.  Pearlite determination in plain carbon steel by eddy current method , 2008 .

[12]  Wuliang Yin,et al.  Evaluation of rail decarburisation depth using a H-shaped electromagnetic sensor , 2012 .

[13]  W. C. Leslie,et al.  The physical metallurgy of steels , 1981 .

[14]  Roderick K. Stanley,et al.  Nondestructive Evaluation: A Tool in Design, Manufacturing and Service , 2018 .

[15]  N. Hussain,et al.  Thermomechanical processing in the intercritical region and tensile properties of dual-phase steel , 2009 .

[16]  Mohammad Mazinani,et al.  Effect of Martensite Plasticity on the Deformation Behavior of a Low-Carbon Dual-Phase Steel , 2007 .

[17]  E. Ahmad,et al.  Effect of microvoid formation on the tensile properties of dual-phase steel , 2000 .

[18]  Z. D. Wang,et al.  A review of three magnetic NDT technologies , 2012 .

[19]  S. Chan,et al.  Study of microstructure, mechanical properties, and magnetization process in low carbon steel bars by Barkhausen emission , 2003 .

[20]  T. Jayakumar,et al.  Effect of tensile deformation on micromagnetic parameters in 0.2% carbon steel and 2.25Cr–1Mo steel , 1999 .

[21]  S. Kahrobaee,et al.  ON THE APPLICATION OF NON-DESTRUCTIVE EDDY CURRENT METHOD FOR QUALITY CONTROL OF HEAT TREATED PARTS , 2010 .

[22]  Dagoberto Brandão Santos,et al.  Microstructural evolution at the initial stages of continuous annealing of cold rolled dual-phase steel , 2005 .

[23]  S. Konoplyuk.  Estimation of pearlite fraction in ductile cast irons by eddy current method , 2010 .

[24]  Majid Pouranvari,et al.  The effect of intercritical heat treatment temperature on the tensile properties and work hardening behavior of ferrite–martensite dual phase steel sheets , 2009 .

[25]  Dierk Raabe,et al.  Deformation and fracture mechanisms in fine- and ultrafine-grained ferrite/martensite dual-phase steels and the effect of aging , 2011 .

[26]  Wuliang Yin,et al.  Measurement of permeability and ferrite/austenite phase fraction using a multi-frequency electromagnetic sensor , 2009 .

[27]  Mehrdad Kashefi,et al.  Magnetic nondestructive technology for detection of tempered martensite embrittlement , 2012 .

[28]  B. Shaw,et al.  Magnetic barkhausen noise: The influence of microstructure and deformation in bending , 2005 .

[29]  Ali Bayram,et al.  Effects of microstructure and notches on the mechanical properties of dual-phase steels , 1999 .

[30]  Toivo Lepistö,et al.  On the stress vs. Barkhausen noise relation in a duplex stainless steel , 2004 .

[31]  Wuliang Yin,et al.  Multi-frequency electromagnetic sensor measurement of ferrite/austenite phase fraction - Experiment and theory , 2006 .

[32]  R. Premkumar,et al.  Relative effect(s) of texture and grain size on magnetic properties in a low silicon non-grain oriented electrical steel , 2003 .

[33]  A. Marder.  Deformation characteristics of dual-phase steels , 1982 .