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| 1 | Microstructure and properties in dissimilar/similar weld joints between DP780 and DP980 steels processed by fiber laser welding显示文摘The microstructure and mechanical properties(strength, fatigue and formability) of dissimilar/similar weld joints between DP780 and DP980 steels were studied. The microstructure in fusion zone(FZ) was lath martensite(LM), and alloying elements in the FZ were uniformly distributed. The hardness in the FZ of dissimilar weld joint was similar to the average value(375 HV) of the two similar weld joints. The microstructural evolution in heat affected zone(HAZ) of dissimilar/similar weld joints was as follows:LM(coarse-grained HAZ) →finer LM(fine-grained HAZ) →M-A constituent and ferrite(intercritically HAZ) →tempered martensite(TM) and ferrite(sub-critical HAZ). Lower hardness in intercritically HAZ and sub-critical HAZ(softening zones) was observed compared to base metal(BM) in dissimilar/similar weld joints. The size of softening zone was 0.2–0.3 mm and reduction in hardness was ~7.6%–12.7% of BM in all the weld joints, which did not influence the tensile properties of weld joints such that fracture location was in BM. Formability of dissimilar weld joints was inferior compared to similar weld joints because of the softening zone, non-uniform microstructure and hardness on the two sides of FZ. The effect of microstructure on fatigue life was not influenced due to the presence of welding concavity. | Hongshuang Di Qian Sun Xiaonan Wang Jianping Li | 2017 | Journal of Materials Science & Technology2017，33，12： | 8 |
| 2 | Effect of Heat Treatment on Microstructures and Mechanical Properties of Hot-Dip Galvanized DP Steels显示文摘In order to simulate the hot-dipped galvanizing of dual-phase(DP) steel(wt%) 0.15C–0.1Si–1.7Mn, the DP steels were obtained by different annealing schedules. The effects of soaking temperature, time, and cooling rate on ferrite grain, volume fraction of martensite, and the fine structure of martensite were studied. Results showed that the yield strength(YS) of DP steel is sensitive to annealing schedule, while total elongation has no noticeable dependence on annealing schedule. Increasing soaking temperature from 790 to 850 °C, the YS is the lowest at soaking temperature of 850 °C. Changing CR1 from 6 to 24 °C/s, the YS is the highest when CR1 is 12 °C/s. Increasing soaking time from 30 to100 s, the YS is the lowest at soaking time of 100 s. Besides, it was found that sufficient movable dislocations within ferrite grains and high martensite volume fraction can eliminate yield point elongation, decrease the YS, and increase ultimate tensile strength. Through TEM observations, it was also found that increasing annealing temperature promotes austenite transformation into twin martensite, and increases volume fraction of martensite at sufficient cooling rate. With increasing the martensite volume fraction, the deformation substructure in the ferrite is well developed. | Enbao Pan Hongshuang Di Guangwei Jiang Chengren Bao | 2014 | Acta Metallurgica Sinica(English Letters)2014，27，3： | 8 |
| 3 | Effect of Annealing Temperature on the Precipitation Behavior and Texture Evolution in a Warm-Rolled P-Containing Interstitial-Free High Strength Steel显示文摘By using transmission electron microscopy and electron back-scattered diffraction, the effect of annealing temperature on the precipitation behavior and texture evolution in a warm-rolled interstitial-free high strength steel was studied. The results indicated that fine FeTiP could precipitate at 650 °C, and the number of those precipitates increased greatly with the increasing annealing temperature until 800 °C. Furthermore, the nucleation of FeTiP was influenced by the precipitation of TiC and(Ti, Nb) C. The near absence of FeTiP and a large volume fraction of TiC and(Ti, Nb) C in matrix are envisaged to be primarily responsible for the sharp c-fiber texture. As the boundary pinning effect caused by FeTiP is weak and there are less interstitial C atoms in matrix. Thus, annealing at 800 °C leads to the highest intensity of c-fiber texture. | Jiecen Zhang Yu Cao Guangwei Jiang Hongshuang Di | 2014 | Acta Metallurgica Sinica(English Letters)2014，27，3： | 3 |
| 4 | An electron backscattered diffraction study on the dynamic recrystallization behavior of a nickel–chromium alloy (800H) during hot deformation显示文摘 | Yu Cao Hongshuang Di Jingqi Zhang Jiecen Zhang Tianjun Ma R.D.K. Misra | 2013 | Materials Science & Engineering A2013，，： | 2 |
| 5 | Spheroidizing kinetics of eutectic carbide in the twin roll-casting of M2 high-speed steel显示文摘 | Hongshuang Di Xiaoming Zhang Guodong Wang Xianghua Liu | 2005 | Journal of Materials Processing Technology2005，166，： | 1 |
| 6 | Spheroidizing kinetics of eutecfic carbide in the twin roll- casting of M2 high-speed steel显示文摘 | Di Hongshuang Zhang Xiao-ming Wang Guo-dong | 2005 | Journal of Materials Pro- cessing Technology2005，166，： | 1 |
| 7 | Spheroidizing kinetics of eutectic carbide in the twin roll-casting of M2 high-speed steel 显示文摘 | Di Hongshuang Zhang Xiaoming Wang Guodong et ol | 2005 | Journal of Materials Processing Technology2005，166，： | 1 |
| 8 | Evolution of deformation and annealing textures in Incoloy 800H/HT via different rolling paths and strains 显示文摘 | Cao Yu Di Hongshuang Misra R D K | 2014 | Materials Science & Engineering A2014，33，5： | 1 |
| 9 | Effect of deformation on continuous cooling phase transformation behaviors of 780 MPa Nb-Ti ultra-high strength steel显示文摘 | WANG Xiaonan DU Linxiu DI Hongshuang | 2011 | Steel Research International2011，82，12： | 1 |
| 10 | 3-D Numerical Simulation of the Electromagnetic Dam of Twin Roll Casting using Edge Element Method显示文摘The 3-dimension numerical simulation study on the electromagnetic dam used in the twin roll caster has been performed by using the edge element method. It was found that the materials and structures of the roll collars have great influence on the distribution of the magnetic flux density, eddy current density and the electromagnetic force in the molten pool. The conductive collars make the magnetic flux density decreased in the molten pool, but it also makes the magnetic force more uniformly, and the force in the low part of the molten pool where needs greater force have increased some what. The conductive collars make the EMD device more effective than the nonconductive collars. | Peiwei BAO, Hongshuang DI, Aiwen QIAN, Xiaoming ZHANG and Guodong WANGState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China | 2003 | Journal of Materials Science & Technology2003，19，2： | 1 |
| 11 | Constitutive analysis of the hot deformation behavior of Fe–23Mn–2Al–0.2C twinning induced plasticity steel in consideration of strain显示文摘 | Jingqi Zhang Hongshuang Di Xiaoyu Wang Yu Cao Jiecen Zhang Tianjun Ma | 2013 | Materials and Design2013，，： | 1 |
| 12 | 查看详情显示文摘 | Miao Yuchuan Zhang Xiaoming Di Hongshuang | | 0，，： | 1 |
| 13 | Two Dimension Finite Element Simulations on the Electromagnetic Containment in Twin-Roll Strip Casting显示文摘Distribution of magnetic field and electromagnetic force in twin-roll casting of steels was studied by the method of numericalsimulation in this paper. Two-dimension finite element model, which includes the regions of melt, stainless collar, coil andmagnetic core, has been constructed. By solving magnetic vector potential formulations of quasi-static electromagnetic field,distribution of magnetic flux density and magnetic force at different molten height is determined. Calculated results showedthat intensity of the distribution of magnetic flux density increased linearly with the increased coil current; and the magneticforce in the melt increased as a quadratic cure with creased coil current. More attention was given to the distribution of eddycurrent and magnetic force in the melt, the confine effect at different molten height was also discussed. | Peiwei BAO, Hongshuang DI, Xiaoming ZHANG, Guodong WANG and Xianghua LIUState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China | 2003 | Journal of Materials Science & Technology2003，19，1： | 0 |
| 14 | Modeling the spread of hot-rolled Ni-based alloy plates显示文摘The width spread of Ni-based alloy plates in the rolling process is studied. An equation for describing the rolling spread of Ni-based alloy plate is proposed based on production data and the Bachtinow equation,which cannot fully account for the compositional variability of Ni-based alloys. To address this,a new coefficient for alloying is added to the equation based on production data. By adding alloying coefficients,it is possible to improve the prediction accuracy for the rolling spread of Ni-based alloy plates and thus better control the width of the rolling spread of different steel grades. | MA Tianjun DI Hongshuang | 2017 | Baosteel Technical Research2017，11，4： | 0 |
| 15 | Numerical Simulation of Two Types of Electromagnetic Edge Dam Used in Twin Roll Strip Casting显示文摘Two types of electromagnetic edge dams were analyzed by using finite element method in present paper. The magnetic vector potential method and edge element method were used. The distributions of the magnetic field, the eddy current intensity and the magnetic force were obtained from the computing. The differences in these fields were explained according to the two types of electromagnetic dam, and characters of their application in twin roll casting were also discussed. | Peiwei BAO Peijie LI Hongshuang DI Xianghua LIU Guodong WANG | 2005 | Journal of Materials Science & Technology2005，21，4： | 0 |
| 16 | Microstructure and Eutectic Carbide Morphology of the High Speed Steel Strips Produced by Twin Roll Strip Casting Process显示文摘The M2 high-speed steel strip was produced by using the laboratory scale twin roll strip caster. The microstructureand eutectic carbide morphology of thus produced products were observed and analyzed, and the comparison ofthose with conventional products was carried out. The effects of the processing parameters such as the meltingtemperature, the pouring temperature, rolling speed and separating force on the microstructure and eutectic carbidemorphology and their distribution were analyzed. The spheroidizing process of the strips in the annealing process wasinvestigated. The relations between the growth and spheroidizing of the eutectic carbide and the annealing technologywere obtained, and the mechanism of the twin roll strip casting process improving the eutectic carbide spheroidizingwas discussed. The theoretical instruction for determining the subsequent treatment process was provided. | Hongshuang DI, Xiaoming ZHANG, Guodong WANG and Xianghua LIUState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, China | 2003 | Journal of Materials Science & Technology2003，19，5： | 0 |
| 17 | Orientation-Dependent Characteristics for Residual Grains during Hot Deformation of Nickel-Based Alloy 925显示文摘In the present work, the orientation characteristics of residual grains during hot deformation of an age-hardening Ni-Fe-Cr alloy(Alloy 925) at different conditions were systematically analyzed through high-resolution electron back-scatter diffraction. Based on the measurement of the kernel average misorientation, the density of geometrical necessary dislocations(GNDs) was further calculated. The orientation-dependent deformation mechanism of the residual grains was also discussed using Schmid factor difference ratio(SFDR) analysis. The results show that the deformed microstructure features typical 'necklace' structures. Many distorted twin boundaries can be observed within the residual grains at 950 ℃. When the deformation temperature increases to 1150 ℃, the volume fraction of dynamic recrystallization(DRX) increases, leading to the extensive formation of primary Σ3 twin boundaries. Additionally, the GNDs are widely distributed in the residual grains, while they are rare for the recrystallized grains. The maximum GND density value can be obtained at the interface of 'soft–hard' grains. The GND density also increases at higher strain rates, and the number of DRX grains significantly affects the distribution of the GND density. Moreover, based on the calculations and SFDR analysis, it can be summarized that the {100} and {111} grains are prone to deform in the uniserial slip mode and the multiple slip mode, respectively. | Yulong Zhu Yu Cao Rui Luo Cunjian Liu Hongshuang Di Gang Shu Guangjie Huang Qing Liu | 2021 | Acta Metallurgica Sinica(English Letters)2021，34，9： | 0 |
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