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| 1 | The effects of fabrication atmosphere condition on the microstructural and mechanical properties of laser direct manufactured stainless steel 17-4 PH显示文摘The effects of atmosphere conditions on microstructural and mechanical properties of stainless steel 17-4PH components fabricated by laser direct manufacturing (LDM) were investigated through mea-surements on phase constitution, porosity, tensile strength, fracture morphology, hardness and evolution of substrate temperature. Results showed that the samples produced in air atmosphere condition pos-sessed higher tensile strength and hardness for both as-deposited and heat-treated states than that in Ar chamber condition, due to dispersion strengthening effect of amorphous oxide particles and nitrogen solution strengthening as a result of higher content of oxygen and nitrogen. The temperature of substrate heat accumulation was higher in Ar chamber condition, leading to dramatically lower porosity and more reverse austenite, which also contributed to the lower strength and hardness. | D.Wang C.T.Chi W.Q.Wang Y.L.Li M.S.Wang X.G.Chen Z.H.Chen X.P.Cheng Y.J.Xie | 2019 | Journal of Materials Science & Technology2019，35，7： | 6 |
| 2 | PREPARATION AND PROPERTIES OF BULK CERAMICS VIA PYROLYSIS OF POLYCARBOSILANE WITH ACTIVE FILLERS I. EVOLUTION PROCESS IN ACTIVE FILLER CONTROLLED PYROLYSIS显示文摘The pyrolytic process of polycarbosilane (PCS) with active fillers (Ti, TiH 2, TiB 2, Cr, CrSi 2) is investigated. The ceramic yields with active fillers reach over 100% in N 2 atmosphere, and no shrinkage occurs when 12vol% Ti, or 4vol% Cr, or 3vol% CrSi 2 is added into PCS. XRD patterns indicate that metal carbides and nitrides form by reacting with gaseous evolution and N 2. | H.F.Hu, Z.H.Chen and C.J.Zhou Department of Material Engineering & Applied Chemistry, National University of Defense Technology, Changsha 410073,China | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，5： | 2 |
| 3 | Solid-state alloying of Al-Mg alloys by accumulative roll-bonding:Microstructure and properties显示文摘In this study,a novel solid-state alloying approach was adopted to fabricate Al-Mg alloys with high Mg contents(C_(Mg)) by accumulative roll-bonding(ARB)of Al and Mg elemental materials to ultrahigh cycles.Experimental results showed that the degree of alloying increased with the increase of ARB cycles and a supersaturatedα-Al solid solution accompanied with nanoprecipitates was formed in the Al-Mg alloys by ARB to 70 cycles.The as-prepared Al-Mg alloys exhibited enhanced mechanical properties,with a maximum tensile strength of∼615 MPa and a tensile elongation of∼10%at C_(Mg)=13 wt.%.The high strength can be attributed to different mechanisms,namely solid solution strengthening,grain boundary strengthening,dislocation strengthening,and precipitation strengthening.The Al-Mg alloys showed increased work hardening with increasing C_(Mg),due to the enhanced formation of nanoprecipitates.Meanwhile,no obvious drop in the intergranular corrosion(IGC)resistance was found in the Al-Mg alloys with C_(Mg) up to 13 wt.%.Moreover,sensitization treatment was found to induce little decrease in the IGC resistance of the Al-Mg alloys with C_(Mg)≤13 wt.%.We found that the excellent IGC resistance was due to the suppression of grain boundary precipitation by the preferred formation of precipitates within the grains that were induced by ARB.Our study indicated the novelty of the present solid-state alloying approach to achieving a superior combination of high mechanical properties and IGC resistance in Al-Mg alloys. | X.M.Mei Q.S.Mei J.Y.Li C.L.Li L.Wan F.Chen Z.H.Chen T.Xu Y.C.Wang Y.Y.Tan | 2022 | Journal of Materials Science & Technology2022，，30： | 1 |
| 4 | 查看详情显示文摘 | C.J.Cheng C.L.Lu Z.H.Chen L.You L.Chen J.Wang and T.Wu | | 0，，24： | 1 |
| 5 | 查看详情显示文摘 | Z.H.Chen S.Prosandeev Z.L.Luo W.Ren Y.J.Qi C.W.Huang L.You C.Gao I.A.Kornev T.Wu J.Wang P.Yang T.Sritharan L.Bellaiche and L.Chen | | 0，，09： | 1 |
| 6 | 查看详情显示文摘 | Z.H.Chen Z.L.Luo C.W.Huang Y.J.Qi P.Yang L.You C.S.Hu T.Wu J.L.Wang C.Gao T.Sritharan and L.Chen | | 0，，01： | 1 |
| 7 | An electrochemiluminescent biosensor for uric acid based on the electrochemiluminescence of bis-[3,4,6-trichloro-2-(pentyloxycarbonyl)-phenyl] oxalate on an ITO electrode modified by an electropolymerized nickel phthalocyanine film显示文摘 | Z.Y.Lin Z.H.Chen Y.Liu | | 0，，6： | 1 |
| 8 | PREPARATION AND PROPERTIES OF BULK CERAMICS VIA PYROLYSIS OF POLYCARBOSILANE WITH ACTIVE FILLERS II.FLEXURAL STRENGTH AND ANTI-OXIDATIVE PROPERTIES OF ACTIVE FILLER/PCS DERIVED BULK CERAMICS显示文摘The flexural strengths and oxidative resistant properties of the ceramics derived from polycarbosilane and active fillers (Ti, TiH 2, TiB 2, Cr, and CrSi 2) were measured and characterized. The introduction of active fillers enhances slightly the flexural strengths, and further densification is required to obtain higher strengths. The oxidative resistant behaviors of the specimens with active fillers are, by means of weight gain in air, poorer compared with those without active fillers. | H.F.Hu,Z.H.Chen, and C.J.Zhou Department of Material Engineering & Applied Chemistry, National University of Defense Technology, Changsha 410073,China | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，5： | 1 |
| 9 | Hybrid PIC–fluid simulations for fast electron transport in a silicon target显示文摘Ultra-intense laser-driven fast electron beam propagation in a silicon target is studied by three-dimensional hybrid particle-in-cell–fluid simulations.It is found that the transverse spatial profile of the fast electron beam has a significant influence on the propagation of the fast electrons.In the case of a steep spatial profile(e.g.,a super-Gaussian profile),a tight fast electron beam is produced,and this excites more intense resistive magnetic fields,which pinch the electron beam strongly,leading to strong filamentation of the beam.By contrast,as the gradient of the spatial profile becomes more gentle(e.g.,in the case of a Lorentzian profile),the resistive magnetic field and filamentation become weaker.This indicates that fast electron propagation in a solid target can be controlled by modulating the spatial gradient of the laser pulse edge. | X.H.Yang Z.H.Chen H.Xu Y.Y.Ma G.B.Zhang D.B.Zou F.Q.Shao | 2023 | Matter and Radiation at Extremes2023，8，3： | 0 |
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