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Effect of Ti_(p) Content on the Work Hardening and Softening Behavior of Mg-Zn-Ca Alloy 被引量:1
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作者 Jin-Kai Zhang Cui-Ju Wang +3 位作者 Yi-Dan Fan Chao Xu Kai-Bo Nie Kun-Kun Deng 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2024年第3期551-560,共10页
The Ti_(p)/ZX60 composites with different Ti_(p) contents were prepared by semi-solid stirring casting.After extrusion,the microstructure,work hardening and softening behavior of the Ti_(p)/ZX60 composites were analyz... The Ti_(p)/ZX60 composites with different Ti_(p) contents were prepared by semi-solid stirring casting.After extrusion,the microstructure,work hardening and softening behavior of the Ti_(p)/ZX60 composites were analyzed compared with the ZX60(Mg-6Zn-0.2Ca)alloy.The results showed that the addition of Ti_(p) could not only promote the nucleation of dynamic recrystallized(DRXed)grains,but also be propitious to the refinement of DRXed grains.With increasing Ti_(p) content,the size of DRXed grains decreased accompanied with increasing volume fraction of DRXed grains.As the Ti_(p) content increased to 15 vol.%,the average size and volume fraction of DRXed grains reached to~0.32μm and 93.2%,respectively.Besides,both the strength and elongation were improved by the addition of Ti_(p).With increasing content of Ti_(p),a substantial increase in the strength was achieved with little change in the elongation.However,the elongation decreased sharply when the Ti_(p) content further increased to 15 vol.%.The addition of Ti_(p) led to an increase in the work hardening rate,which gradually increased with increasing Ti_(p) content.However,the softening rate did not demonstrate the same tendency with increasing Ti_(p) content.Unlike the conventional ceramic particles,the Ti_(p) can be deformed in coordination with the matrix alloy,which imparted a higher softening rate to the matrix alloy.Even though the softening rate improved as the Ti_(p) content increased from 5 to 10 vol.%,it dropped deeply as the Ti_(p) content increased to 15 vol.%owing to the fracture of Ti_(p) during extrusion. 展开更多
关键词 Titanium particle content Particle reinforced magnesium matrix composites Work hardening Softening behavior Mechanical properties
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Experimental study on the ignition and combustion characteristics of a magnesium particle in water vapor 被引量:1
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作者 HUANG Xu XIA ZhiXun +1 位作者 HUANG LiYa HU JianXin 《Science China(Technological Sciences)》 SCIE EI CAS 2012年第9期2601-2608,共8页
Magnesium is of interest for underwater propulsion due to the superior ignition behavior of magnesium particles and the highly exothermic Mg-water reaction.In this work,the ignition and combustion characteristics of a... Magnesium is of interest for underwater propulsion due to the superior ignition behavior of magnesium particles and the highly exothermic Mg-water reaction.In this work,the ignition and combustion characteristics of an individual millimeter-sized magnesium particle in water vapor were studied.In order to build an atmosphere of water vapor,an experiment system was established and validated by the experiments of magnesium particle in air.The ignition and combustion of a single magnesium particle were accomplished in a combustor filled with water vapor.The surface changes of the particle during the ignition and a steady-state vapor phase combustion were observed.Based on the data obtained,ignition mechanism was analyzed and ignition temperature was determined.The steady-state combustion of the sample was controlled by diffusion in gas phase,and a one-dimensional,spherically symmetric quasi-steady model was adopted to describe the process.The dependence of burning time on the diameter was investigated,and the conclusion that burning time is proportional to the square of the metal sample diameter was drawn. 展开更多
关键词 magnesium particle water vapor IGNITION COMBUSTION EXPERIMENT water ramjet
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Mechanical Properties and Fracture Behavior of Mg-Al/AlN Composites with Different Particle Contents 被引量:2
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作者 Jie Chen Chonggao Bao +2 位作者 Wenhui Chen Li Zhang Jinling Liu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2017年第7期668-674,共7页
In this study, magnesium matrix composites reinforced with different loading of AlN particles were fabricated by the powder metallurgy technique. The microstructure, bending strength and fracture behavior of the resul... In this study, magnesium matrix composites reinforced with different loading of AlN particles were fabricated by the powder metallurgy technique. The microstructure, bending strength and fracture behavior of the resulting Mg-Al/Al N composites were investigated. It showed that the 5 wt% AlN reinforcements led to the highest densification and bending strength. The total strengthening effect of AlN particles was predicted by considering the contributions of CTE mismatch between the matrix and the particles,load bearing and Hall-Petch mechanism. The results revealed that the increase of dislocation density,the change of Mg17Al12 phase morphology, and the effective load transfer were the major strengthening contributors to the composites. The fracture of the composites altered from plastic to brittle mode with increasing reinforcement content. The regions of clustered particles in the composites were easy to be damaged under external load, and the fracture occurred mainly along grain boundaries. 展开更多
关键词 magnesium matrix composite AlN particle Bending strength Fracture behavior Microstructure Powder metallurgy
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