Rapid hardening of AISI 4340 steel induced by electropulsing treatment
| Autor: | Zhefeng Zhang, D.D. Ben, Yan Ma, J.C. Pang, Huajie Yang, X.H. Shao |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Metallurgy 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Indentation hardness Carbide Gibbs free energy symbols.namesake Mechanics of Materials Transmission electron microscopy 0103 physical sciences Metallic materials symbols Hardening (metallurgy) General Materials Science 0210 nano-technology Dissolution |
| Zdroj: | Materials Science and Engineering: A. 725:28-32 |
| ISSN: | 0921-5093 |
| Popis: | Mechanisms for the rapid hardening induced by electropulsing treatment (EPT) in an AISI 4340 steel were investigated by X-ray-diffraction analysis, transmission electron microscopy observations and Vickers microhardness tests. It is found that the combined strengthening effects induced by solid-solution atoms, dislocations, and nano-twins gradually surpass the dispersion strengthening after EPT. Besides, carbides dissolution and phase transformation were also detected due to the decreasing trend of Gibbs free energy during EPT. Such rapid hardening method may be preferential for manufacturing metallic materials for its time-saving and energy conservation. |
| Databáze: | OpenAIRE |
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