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典型文献
Change in microstructural characteristics of laser powder bed fused Al-Fe binary alloy at elevated temperature
文献摘要:
The present study addressed the change in the microstructure of Al-2.5 wt%Fe binary alloy produced using laser powder bed fusion(L-PBF)technique by thermal exposure at 300℃,and the associated mechanical and thermal properties were systematically examined as well.Multi-semi-cylindrical pat-terns corresponding to melt pools in the microstructure were macroscopically observed for the as-manufactured sample.No change in the melt-pool morphology was observed after thermal exposure for 1000 h.Inside the melt pools,a large number of the nanoscale metastable Al6Fe phase particles were uniformly distributed inside columnar grains of the α-Al matrix containing concentrated solute Fe in su-persaturation.The sequential formation and coarsening of stable θ-Al13Fe4 phases were observed upon exposure to a 300℃environment,but a considerable amount of nano-sized metastable Al6Fe phases re-mained even after 1000 h.Furthermore,the thermal exposure continuously reduced the concentration of solute Fe atoms in the α-Al matrix.No significant grain growth was found in α-Al matrix after 1000 h owing to the pinning effect of the dispersed fine particles on grain boundary migration.These results demonstrate a sluggish change in microstructural morphologies of the Al-2.5 wt%Fe alloy.The quan-tified microstructural parameters addressed dominant strengthening contributions by the solid solution of Fe element and Orowan strengthening mechanism by fine Al-Fe intermetallics in the L-PBF-produced alloy.The high strength level was sustained even after being exposed to 300℃for long periods.The superior balance of mechanical properties and thermal conductivity can be achieved in the experimental alloys by taking advantage of the various microstructural parameters related to the Al-Fe intermetallic phases and α-Al matrix.
文献关键词:
作者姓名:
Xing Qi;Naoki Takata;Asuka Suzuki;Makoto Kobashi;Masaki Kato
作者机构:
Department of Materials Process Engineering,Graduate School of Engineering,Nagoya University,Furo-cho,Chikusa-ku,Nagoya 464-8603,Japan;Aichi Center for Industry and Science Technology,1267-1 Akiai,Yakusa-cho,Toyota 470-0356,Japan
引用格式:
[1]Xing Qi;Naoki Takata;Asuka Suzuki;Makoto Kobashi;Masaki Kato-.Change in microstructural characteristics of laser powder bed fused Al-Fe binary alloy at elevated temperature)[J].材料科学技术(英文版),2022(02):38-53
A类:
Al6Fe,persaturation,Al13Fe4
B类:
Change,microstructural,characteristics,laser,powder,bed,fused,binary,elevated,temperature,present,study,addressed,change,microstructure,produced,using,fusion,PBF,technique,by,thermal,exposure,associated,mechanical,properties,were,systematically,examined,well,Multi,semi,cylindrical,pat,terns,corresponding,melt,pools,macroscopically,observed,manufactured,sample,No,morphology,was,after,Inside,large,number,nanoscale,metastable,particles,uniformly,distributed,inside,columnar,grains,matrix,containing,concentrated,solute,sequential,formation,coarsening,phases,upon,environment,considerable,amount,sized,mained,even,Furthermore,continuously,reduced,concentration,atoms,significant,growth,found,owing,pinning,effect,dispersed,fine,boundary,migration,These,results,demonstrate,sluggish,morphologies,quan,tified,parameters,dominant,strengthening,contributions,solid,solution,element,Orowan,mechanism,intermetallics,high,level,sustained,being,exposed,long,periods,superior,balance,conductivity,achieved,experimental,alloys,taking,advantage,various,related
AB值:
0.51457
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