<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2008000800008</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Nondestructive inspection of plastic deformation in commercial carbon steels using magnetic Barkhausen noise]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodriguez]]></surname>
<given-names><![CDATA[J.L.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Perez-Benitez]]></surname>
<given-names><![CDATA[J.A.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Capo-Sanchez]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Padovese]]></surname>
<given-names><![CDATA[L.R.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Betancourt-Riera]]></surname>
<given-names><![CDATA[Re]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad de Oriente Facultad de Ciencias Naturales Departamento de Física]]></institution>
<addr-line><![CDATA[Santiago de Cuba ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Univerdidade de São Paulo Escola Politécnica Departamento de Engenharia Mecânica]]></institution>
<addr-line><![CDATA[São Paulo ]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Universidad de Sonora Departamento de Investigación en Física ]]></institution>
<addr-line><![CDATA[Hermosillo Sonora]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>11</month>
<year>2008</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>11</month>
<year>2008</year>
</pub-date>
<volume>54</volume>
<fpage>51</fpage>
<lpage>53</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2008000800008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2008000800008&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2008000800008&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[The present work shows measurements of the Magnetic Barkhausen Noise (MBN) in commercial AISI/SAE 1045 and ASTM 36 steel deformed samples. The correlation between the MBN root mean square, Barkhausen signal profile and MBN power spectrum with the plastic deformation is established. The results show that the power spectral density of the Barkhausen signal is more effective as nondestructive evaluator than root mean square of Barkhausen signal. The outcomes also suggest the presence of unbalanced tensions between the surface and the bulk of sample due to the presence of plastic deformation.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Se mide el Ruido de Barkhausen Magnético (MBN) en muestras comerciales de acero deformado AISI/SAE 1045 y ASTM 36. La establece relación entre la raíz cuadrática media de MBN, señal de contorno Barkhausen y la potencia espectral MBN con la deformación plástica. Los resultados muestran que la potencia de la densidad espectral de la señal Barkhausen es mas efectiva como evaluador no destructivo que la raíz cuadrática media de la señal Barkhause. Los resultados hacen pensar la existencia de tensiones desequilibradas entre la superficie y el volumen de muestra debido a la presencia de deformacion plástica.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Magnetic Barkhausen noise]]></kwd>
<kwd lng="en"><![CDATA[defects]]></kwd>
<kwd lng="en"><![CDATA[plastic deformation]]></kwd>
<kwd lng="en"><![CDATA[plain steels]]></kwd>
<kwd lng="es"><![CDATA[Ruido magnético Barkhausen]]></kwd>
<kwd lng="es"><![CDATA[defectos]]></kwd>
<kwd lng="es"><![CDATA[deformaciones plásticas]]></kwd>
<kwd lng="es"><![CDATA[aceros planos]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="center"><font face="verdana" size="4"><b>Nondestructive inspection of plastic deformation in commercial carbon steels using magnetic Barkhausen noise</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>J.L. Rodriguez<sup>&ordf;</sup>, J.A. Perez&#150;Benitez<sup>&ordf;</sup>,  J. Capo&#150;Sanchez<sup>&ordf;</sup>, L.R. Padovese<sup>b</sup> and Re. Betancourt&#150;Riera<sup>c</sup></b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>&ordf;</sup> Departamento de F&iacute;sica. Facultad de Ciencias Naturales, Universidad de Oriente, Av. Patricio Lumumba s/n 90500, Santiago de Cuba, Cuba, </i>e&#150;mail: <a href="mailto:&#237;ndio@cnt.uo.edu.cu">&iacute;ndio@cnt.uo.edu.cu</a>, <a href="mailto:benitez@cnt.uo.edu.cu">benitez@cnt.uo.edu.cu</a>, <a href="mailto:jcapo@cnt.uo.edu.cu">jcapo@cnt.uo.edu.cu</a></font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>b</sup> Departamento de Engenharia Mec&acirc;nica, Escola Polit&eacute;cnica. Univerdidade de S&atilde;o Paulo, Av. Prof Mello Moraes, 2231, 05508&#150;900, S&atilde;o Paulo, Brasil, </i>e&#150;mail: <a href="mailto:lrpadove@usp.br">lrpadove@usp.br</a></font></p>     <p align="justify"><font face="verdana" size="2"><sup>c</sup><i> Departamento de Investigaci&oacute;n en F&iacute;sica, Universidad de Sonora, Apartado Postal 5&#150;088, 83190, Hermosillo, Sonora, M&eacute;xico, </i>e&#150;mail: <a href="mailto:rbriera@posgrado.cifus.uson.mx">rbriera@posgrado.cifus.uson.mx</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Recibido el 12 de octubre de 2007    <br> Aceptado el 9 de agosto de 2008</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>     <p align="justify"><font face="verdana" size="2">The present work shows measurements of the Magnetic Barkhausen Noise (MBN) in commercial AISI/SAE 1045 and ASTM 36 steel deformed samples. The correlation between the MBN root mean square, Barkhausen signal profile and MBN power spectrum with the plastic deformation is established. The results show that the power spectral density of the Barkhausen signal is more effective as nondestructive evaluator than root mean square of Barkhausen signal. The outcomes also suggest the presence of unbalanced tensions between the surface and the bulk of sample due to the presence of plastic deformation.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Keywords: </b>Magnetic Barkhausen noise; defects; plastic deformation; plain steels.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>     <p align="justify"><font face="verdana" size="2">Se mide el Ruido de Barkhausen Magn&eacute;tico (MBN) en muestras comerciales de acero deformado AISI/SAE 1045 y ASTM 36. La establece relaci&oacute;n entre la ra&iacute;z cuadr&aacute;tica media de MBN, se&ntilde;al de contorno Barkhausen y la potencia espectral MBN con la deformaci&oacute;n pl&aacute;stica. Los resultados muestran que la potencia de la densidad espectral de la se&ntilde;al Barkhausen es mas efectiva como evaluador no destructivo que la ra&iacute;z cuadr&aacute;tica media de la se&ntilde;al Barkhause. Los resultados hacen pensar la existencia de tensiones desequilibradas entre la superficie y el volumen de muestra debido a la presencia de deformacion pl&aacute;stica.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Descriptores: </b>Ruido magn&eacute;tico Barkhausen; defectos; deformaciones pl&aacute;sticas; aceros planos.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">PACS: 64.60 Lx; 75.60Ej</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><a href="/pdf/rmf/v54s2/v54s2a8.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>References</b></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">1. O. Saquet, J. Chicois, A. Vicent, <i>Materials Science and Engineering: A</i> <b>269</b> (1999) 73.</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8350246&pid=S0035-001X200800080000800001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p align="justify"><font face="verdana" size="2">2. J. Cap&oacute;&#150;Sanchez, J.A. 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