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Microstructure and Mechanical Properties of Granular Pearlite Steel After Equal Channel Angular Pressing

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Abstract

Equal channel angular pressing (ECAP) of granular pearlite high carbon steel was carried out at room temperature via the Bc route. The microstructure evolution was investigated by means of scanning and transmission electron microscopy, and the mechanical properties of granular pearlite steel were measured by tensile and microhardness testing. After four passes, the microstructure was obviously refined. An ultrafine microduplex structure with 400 nm equiaxed ferrite grains and 200 nm cementite particles were formed. The yield strength, ultimate tensile strength, microhardness, and the ratio of the yield to tensile strength increased with the number of ECAP passes, however, the elongation slightly reduced. The tensile fracture morphology changes gradually from ductile fracture to ductile and quasi-cleavage mixed fracture.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China under Grant No. 50801021 and 51201061, and by the program for the Young Key Teachers in the Henan Province under Grant No. 2011GGJS-070, and the Henan Province Program for Science and Technology Innovation Excellent Talents (144200510009).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, 471003, P.R. China

    Yi Xiong, Pengyan Li, Lufei Chen & Fengzhang Ren

  2. Collaborative Innovation Center of Nonferrous Metals, Luoyang, 471003, P.R. China

    Yi Xiong & Fengzhang Ren

  3. Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, P.R. China

    Tiantian He

  4. Department of Mechanical Engineering, University of South Florida, Tampa, FL, 33620, USA

    Alex A. Volinsky

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  1. Yi Xiong
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  2. Tiantian He
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  3. Pengyan Li
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  4. Lufei Chen
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  5. Fengzhang Ren
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Correspondence to Yi Xiong.

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Xiong, Y., He, T., Li, P. et al. Microstructure and Mechanical Properties of Granular Pearlite Steel After Equal Channel Angular Pressing. J. of Materi Eng and Perform 24, 2665–2669 (2015). https://doi.org/10.1007/s11665-015-1553-7

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  • DOI: https://doi.org/10.1007/s11665-015-1553-7

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