典型文献
Enhanced strength and ductility in Al-Zn-Mg-Cu alloys fabricated by laser powder bed fusion using a synergistic grain-refining strategy
文献摘要：
Grain refinement is critical to surpassing the bottlenecks of inherent hot tearing of high-strength alu-minum alloys fabricated by additive manufacturing(AM).In this study,a synergistic grain-refining strategy including heterogeneous nucleation,solute-driven growth restriction and nanoparticle-induced growth restriction was introduced to control the microstructure of Al-Zn-Mg-Cu alloys during the laser powder bed fusion(LPBF)process.Crack-free Al-Zn-Mg-Cu alloys with significantly refined grains were safely fabricated via LPBF by coincorporation of TiC and TiH2 particles.In-situ L12-Al3Ti particles were produced to promote the heterogeneous nucleation.The grain growth was restricted by adding Ti so-lute,while introduced TiC nanoparticles(NPs)improved the density of heterogeneous nucleation sites and blocked grain growth physically.The resultant elimination of columnar grains and hot cracks in the(1 wt.％)TiC-and(0.8 wt.％)TiH2-modified Al-Zn-Mg-Cu alloy resulted in excellent ultimate tensile strength(UTS)of 593±24 MPa,yield strength(YS)of 485±41 MPa and elongation(EL)of 10.0％±2.5％under the T6 condition.This study provides new insights into improving the grain microstructure and mechanical properties of high-strength aluminum alloys during LPBF.
文献关键词：
中图分类号：
作者姓名：
Xiaohui Liu;Yunzhong Liu;Zhiguang Zhou;Qiangkun Zhan
作者机构：
National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials,South China University of Technology,Guangzhou 510641,China
文献出处：
引用格式：
[1]Xiaohui Liu;Yunzhong Liu;Zhiguang Zhou;Qiangkun Zhan-.Enhanced strength and ductility in Al-Zn-Mg-Cu alloys fabricated by laser powder bed fusion using a synergistic grain-refining strategy)[J].材料科学技术（英文版）,2022(29):41-52
A类：
coincorporation
B类：
Enhanced,strength,ductility,Mg,alloys,fabricated,by,laser,powder,bed,fusion,using,synergistic,refining,strategy,Grain,refinement,critical,surpassing,bottlenecks,inherent,hot,tearing,high,additive,manufacturing,AM,In,this,study,including,heterogeneous,nucleation,solute,driven,growth,restriction,induced,was,introduced,control,microstructure,during,LPBF,process,Crack,free,significantly,refined,grains,were,safely,via,TiC,TiH2,situ,L12,Al3Ti,produced,promote,restricted,adding,while,nanoparticles,NPs,improved,density,sites,blocked,physically,resultant,elimination,columnar,cracks,modified,resulted,excellent,ultimate,tensile,UTS,yield,YS,elongation,EL,under,T6,condition,This,provides,new,insights,into,improving,mechanical,properties,aluminum
AB值：
0.5271
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