典型文献
Morphological Heredity of Intermetallic Nb5Si3 Dendrites in Hypereutectic Nb?Si Based Alloys via Non?Equilibrium Solidification
文献摘要：
For hypereutectic Nb-Si based alloys, primary Nb5Si3 phases typically grow in a faceted mode during equilibrium or near-equilibrium solidification, which damages the ductility and toughness. To address this issue, here we artificially manipulate the growth morphology of Nb5Si3 using electron beam surface melting (EBSM) and subsequent anneal- ing treatments. Results show that such a non-equilibrium solidification pathway enables the transition from faceted growth to non-faceted dendritic growth of Nb5Si3, along with evident microstructure refinement, generation of meta-stable β-Nb5Si3 phases and elimination of chemical segregation. The transformation from β-Nb5Si3 to α-Nb5Si3 and Nb solid solution (Nbss) particles is triggered by the annealing treatment at 1450 ℃ for 5 h. Also, we find the annealing-mediated formation of inherited Nb5Si3 dendrites that maintain the dendritic morphology of the original as-solidified β-Nb5Si3 dendrites. This work thus provides a feasible routine to obtain thermally stable and refined α-Nb5Si3 den- drites in hypereutectic Nb-Si based alloys.
文献关键词：
中图分类号：
作者姓名：
Yueling Guo;Lina Jia;Wenjun Lu;Hu Zhang
作者机构：
School of Mechanical Engineering,Beijing Institute of Technology,Bei-jing 100081,China;Research Center of Light?alloy Materials,Frontier Institute of Science and Technology Innovation,Beihang University,Beijing 100191,China;Max-Planck-Institut für Eisenforschung,Max?Planck?Stra?e 1,40237 Düsseldorf,Germany
文献出处：
引用格式：
[1]Yueling Guo;Lina Jia;Wenjun Lu;Hu Zhang-.Morphological Heredity of Intermetallic Nb5Si3 Dendrites in Hypereutectic Nb?Si Based Alloys via Non?Equilibrium Solidification)[J].中国机械工程学报,2022(05):252-259
A类：
Heredity,Dendrites,Hypereutectic,EBSM
B类：
Morphological,Intermetallic,Nb5Si3,Based,Alloys,via,Non,Equilibrium,Solidification,For,hypereutectic,alloys,primary,phases,typically,faceted,mode,during,equilibrium,near,solidification,which,damages,ductility,toughness,To,address,this,issue,here,we,artificially,manipulate,growth,morphology,using,electron,beam,surface,melting,subsequent,treatments,Results,show,that,such,pathway,enables,transition,from,dendritic,along,evident,microstructure,refinement,generation,stable,elimination,chemical,segregation,transformation,solution,Nbss,particles,triggered,by,annealing,Also,find,mediated,inherited,dendrites,maintain,original,solidified,This,work,thus,provides,feasible,routine,obtain,thermally,refined
AB值：
0.539431
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