Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53361#.VMBgxizQrzE Author(s)    C. Díaz-Guillén 1* , E. E. Granda-Gutiérrez 1 , G. Vargas-Gutiérrez 2 , M. R. Díaz-Guillén 3 , J. A. Aguilar-Martínez 4 , L. Álvarez-Contreras 5   Affiliation(s) 1 Corporación Mexicana de Investigación en Materiales S.A. de C.V.-Cátedras-CONACyT, Saltillo, México . 2 Centro de Investigación y Estudios Avanzados del IPN, Saltillo, México . 3 GMyPQ, Instituto de Investigaciones Eléctricas, Cuernavaca, México . 4 Universidad Autónoma de Nuevo León, FIME-CIIIA, Apodaca, México . 5 Centro de Investigación en Materiales Avanzados S.C., Chihuahua, México . ABSTRACT In this work, plasma-nitrided AISI 316L stainless steel samples were performed by ion nitriding process under pulsed direct current (DC) discharge at different current densities (1 to 2.5 mA/ cm 2 ). The effect of nitriding current density on the size of crystalline coheren...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52938#.VKyorcnQrzE Author(s)    P. G. Mordovskoi , S. P. Yakovleva , S. N. Maharova Affiliation(s) Department of Material Science, The V.P. Larionov Institute of Physical and Technical Problems of the North SB RAS, Yakutsk, Russia . ABSTRACT This paper presents the results of equal channel angular pressing (ECAP) and subsequent heat treatment (HT) as a method to improve the wear resistance of metallic materials in friction sliding. The effect of ECAP and HT on the microstructure and mechanical properties of low carbon steel is investigated in this work. The mechanisms of wear resistance of steel with ultrafine and nanostructures produced by equal-channel angular pressing is analyzed. The results show that ECAP at room temperature and annealing at 350°C and 450°C can be used as a technology of reducing wear in friction sliding.   KEYWORDS ...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52488#.VJoaXcCAM4 Author(s)   Fayez M. El-Hossary , Niemat Z. Negm , Ahmed M. Abd El-Rahman , Mohamed Raaif , Alzahraa A. Abd Elmula Affiliation(s) Physics Department, Faculty of Science, Sohag University, Sohag, Egypt . ABSTRACT Titanium oxynitrides combine the properties of metallic oxides and nitrides. In this presentation, titanium was oxynitrided using inductively coupled RF plasma in a gas mixture containing 80% N 2 and 20% O 2 . The effect of plasma-processing power from 350 up to 550 W on microstructure, mechanical, tribological, wettability and electrochemical properties of the oxynitrided titanium was examined u...