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by thermo-mechanical processing based on the mechanism of particle stimulated nucleation of recrystallization. The thermo-mechanically processed sheets were observed to contain layers of different... grain structure along the thickness in the sheets. Key words: 01420 Al-Li alloy; layered grain structure; grain refinement; thermo-mechanical processing; particle stimulated nucleation(PSN......
Effect of Substrate Surface Microstructure on Heterogeneous Nucleation BehaviorYing Zhang, Meng Wang, Xin Lin and Weidong Huang State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi an 710072, China摘 要:The heterogeneous nucleation behaviors of NH4Cl crystal on a rough chilling surface of aluminum immerged......
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nucleation during the solidification of Al-Si binary alloy was estimated by comparing experimentally obtained macrostructures of castings with numerically simulated ones. A molten alloy... for grain structure formation based on the Monte Carlo method was carried out, and the frequency of heterogeneous nucleation in the alloy was evaluated by producing similar structure with the experimental......
Investigation of the Heterogeneous Nucleation on Fractal SurfacesMeng Wang , Ying Zhang, Haoyong Zheng, Xin Lin and Weidong Huang State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi an 710072, China摘 要:Classical theory of heterogeneous nucleation has been developed with an implied hypothesis of smooth substrate......
thermal vibration and the increase of the diffusion rate, the grain boundary migration ability of the experimental alloy is enhanced, resulting in an increase in the nucleation rate of DRX... the best comprehensive mechanical properties. Key words: Mg-Zn-Sn-Mn alloy; Al; microstructure; mechanical properties; dynamic recrystallization; nucleation 1 Introduction Mg alloys are widely used......
Eutectic nucleation in Al-7 wt pct Si-Mg casting alloysZhongwei CHEN , Cuiying MA and Jing ZHAO State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi an 710072, China摘 要:The nucleation of eutectic crystals of hypoeutectic Al-7 wt pct Si-Mg casting alloys modified by Ce and Sr was studied by using differential......
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for grain refinement and the undissolved AlB2 particles is the indirect nucleating base for subsequent α(Al) phase. Key words: Al-3B master alloy; hypoeutectic Al-Si alloys; nucleation mechanism; grain... at 659.7 °C, which is higher than the nucleation temperature of α(Al). So the solid Al created by this reaction can act directly as the nucleation substrate of subsequent α(Al) so as to cause the grain......
Trans. Nonferrous Met. Soc. China 25(2015) 3189-3196 Effects of cooling rate on solution heat treatment of as-cast A356 alloy Chang-lin YANG, Yuan-bing LI, Bo DANG, He-bin , Feng LIU State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China Received 19 November 2014; accepted 30 January 2015 Abstract: The effect of cooling rate......