Influence of Grain Refinement by ECAP on Mechanical and Erosion Corrosion Properties of AISI 4130 Steel: Experimental an
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LS and alloys are anticipated to have improved mechanical and surface properties to meet the desired requirements of various industrial applications. The selection of rotating or moving elements should consider the interaction effects of mechanical, thermal, and tribological factors, considering the surfaces that may be exposed to liquids or slurries.[1] It has been reported that ultrafine-grained structured (UFGS) materials have better mechanical and surface properties than the coarse-grained materials.[2] Sever plastic deformation (SPD) are modern techniques for achieving ultrafine-grained structured (UFGS) materials to enhance the mechanical properties and achieve desired
OSAMA M. IRFAN is with the Mechanical Engineering Department, Beni Suef University, Beni Suef, Egypt and also with the Mechanical Engineering Department, Qassim University, Buraidah 51452, Saudi Arabia. Contact e-mail: [email protected] HANAFY M. OMAR is with the Mechanical Engineering Department, Qassim University. Manuscript submitted January 25, 2019. Article published online July 2, 2019 4232—VOLUME 50A, SEPTEMBER 2019
characteristics. Numerous size scales show several strengthening levels according to size of the grains.[3–5] During the past two decades, many SPD techniques were developed for producing UFGS materials, one of which is the equal channel angular pressing (ECAP).[6–11] ECAP is applied through a die having two channels with identical cross sections, either rectangular or circular. The two channels are connected at a specific angle, usually varies from 90 to 135 deg.[12–14] The ECAP was used for several metallic materials to get ultrafine and nanostructured grain materials. Huang et al.[15] successfully produced nanostructure low-carbon stainless steel by applying ECAP at room temperature. Zenji Horita et al. [16] used the ECAP to produce nanostructured Al-Ag alloy. The results showed an enhancement of the mechanical properties of the new materials. On the other hand, surface damage and wear due to the interaction of erosion and corrosion has undesirable effects on the performance and reliability of the mechanical components. Moreover, the cost of damage due to E–C is a serious problem because of the probability of part replacements and productivity loss.[17] Erosion corrosion wear can be stimulated to METALLURGICAL AND MATERIALS TRANSACTIONS A
the connecting joints, ship bodies, pipelines, internal parts, casings, and impellers of pumps, depending on the composition of the medium and processing conditions.[18] Steel and steel-based alloys are widely used in different industrial applications such as pumps, compressors, machine buildings, fasteners, aerospace, and oil industries. In such applications, the material is usually subjected to harsh conditions such as high mechanical stresses and E–C damage due to minerals or other solid particles suspended to a slurry.[19,20] The problems of erosion and corrosion were investigated through many researchers.[21] It is well known that the resulted pits, holes, or groves due to E–C are diff
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