@article{song_wang_yang_chen_liang_ma_jiang_ma_2020, title={Microstructure and deformation behavior of a novel steel rebar: Effect of the heterogeneous microstructure of soft ferrite and Hard bainite}, volume={9}, ISSN={["2214-0697"]}, DOI={10.1016/j.jmrt.2020.08.085}, abstractNote={This study reports a detailed investigation of the deformation behavior and microstructural evolution of a novel ultra-low carbon Cr-Mo alloyed dual-phase steel rebar aimed for marine applications. The rebar matrix consists of the lamellar ferrite/bainite dual phases with the lamellar interfaces along the rolling direction. The soft ferrite phase is composed of larger grains with a low dislocation density, while the hard bainite phase is composed of finer grains with a much higher dislocation density. By comparing the strain hardening behavior from different sites at the rebar with varying ferrite and bainite volume fractions, it shows that the hetero-deformation induced (HDI) hardening is strong and dominates the overall work hardening behavior in the early stage of plastic deformation by prevailing over the conventional sum-up of contribution of each phase alone. In this stage, the plastic deformation of ferrite was constrained by the disproportionally-strained, neighboring bainite, creating the accumulation of geometrically necessary dislocations (GNDs) at the phase interface and the long-range HDI stress. The results also reinforce the understanding of deformation behavior of dual-phase steels, especially around the role of HDI stress and hardening.}, number={6}, journal={JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T}, author={Song, Dan and Wang, Guowei and Yang, Falin and Chen, Huande and Liang, Ningning and Ma, Han and Jiang, Jinghua and Ma, Xiaolong}, year={2020}, pages={12281–12292} } @article{song_li_liang_yang_jiang_sun_wu_ma_ma_2019, title={Simultaneously improving corrosion resistance and mechanical properties of a magnesium alloy via equal-channel angular pressing and post water annealing}, volume={166}, ISSN={["1873-4197"]}, DOI={10.1016/j.matdes.2019.107621}, abstractNote={Developing magnesium alloys with both high corrosion resistance and superior mechanical properties is a long-standing challenge for the lightweight metal community. Herein, processing route combining equal-channel angular pressing (ECAP) and water annealing to achieve simultaneous improvements on both anti-corrosion and mechanical performances of a Mg-2Zn-Mn-Ca-Ce alloy is proposed. The cast alloy was ECAP-processed at 573 k for 12 passes to obtain ultra-fine grains (UFG), followed by water annealing in the autoclave under 160 °C for 3 h. The treated sample exhibits significantly improved corrosion resistance, presenting less corrosion current density and hydrogen evolution rate in the Hanks' solution. The doubled yield/ultimate strength and elongation, as well as the better-maintained mechanical integrity after corrosion, were achieved simultaneously. The profuse dislocations and grain boundaries in the UFG substrate offer intensive hydrothermal-reaction driving force, favoring the formation of a thicker and more compact Mg(OH)2 coating layer. Such a protective coating layer together with the annealed substrate with fewer crystal defects effectively retards the corrosion degradation and preserves the mechanical integrity afterwards. Meanwhile, the modified heterogeneous substrate microstructure results in the observed superior strength-ductility synergy. The proposed processing route and the resulted comprehensive properties should be applicable to other magnesium alloys as well.}, journal={MATERIALS & DESIGN}, author={Song, Dan and Li, Cheng and Liang, Ningning and Yang, Falin and Jiang, Jinghua and Sun, Jiapeng and Wu, Guosong and Ma, Aibin and Ma, Xiaolong}, year={2019}, month={Mar} } @article{guo_song_jiang_ma_zhang_li_2016, title={Effect of synthesizing temperature on microstructure and electrochemical property of the hydrothermal conversion coating on Mg-2Zn-0.5Mn-Ca-Ce alloy}, volume={6}, number={3}, journal={Metals}, author={Guo, G. H. and Song, D. and Jiang, J. H. and Ma, A. B. and Zhang, L. W. and Li, C.}, year={2016} } @article{song_guo_jiang_zhang_ma_ma_chen_cheng_2016, title={Hydrothermal synthesis and corrosion behavior of the protective coating on Mg-2Zn-Mn-Ca-Ce alloy}, volume={26}, number={6}, journal={Progress in Natural Science}, author={Song, D. and Guo, G. H. and Jiang, J. H. and Zhang, L. W. and Ma, A. B. and Ma, X. L. and Chen, J. Q. and Cheng, Z. J.}, year={2016}, pages={590–599} }