The 5.0 vol.％GNP/2024AI composites were prepared by accumulated shear deformation combined with heat treatment,i.e.the thermomechanical treatment(TMT).The results showed that homogeneous dis-tributed GNPs that aligned along the plastic deformation direction were obtained by six-pass drawing in the solution heat treatment state.The introducing of high-density dislocations in Al matrix by multiple drawing resulted in enhanced nucleation of precipitates and subsequent uniform growth during ageing.Consequently,ultra-strength GNP/2024A1 composites,with yield and ultimate tensile strength 482 and 571 MPa,respectively,were achieved.The high strength was attributed to homogeneous dispersion of undamaged GNPs,fine and dispersed precipitations and work-hardening effect.This work demonstrated that TMT could act as a feasible strategy for preparing high-performance GNP/Al composites.

Zhong Zheng;Xuexi Zhang;Mingfang Qian;Jianchao Li;Muhammad Imran;Lin Geng

School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;Mechanical Engineering Department,University of Engineering&Technology Taxila,Taxila 47050,Pakistan

材料科学技术（英文版）

[1]Zhong Zheng;Xuexi Zhang;Mingfang Qian;Jianchao Li;Muhammad Imran;Lin Geng-.Ultra-high strength GNP/2024Al composite via thermomechanical treatment)[J].材料科学技术（英文版）,2022(13):164-172

2024AI,2024A1

Ultra,high,strength,2024Al,via,thermomechanical,treatment,vol,composites,were,prepared,by,accumulated,shear,deformation,combined,heat,TMT,results,showed,that,homogeneous,GNPs,aligned,along,plastic,direction,obtained,six,pass,drawing,solution,state,introducing,density,dislocations,matrix,multiple,resulted,enhanced,nucleation,precipitates,subsequent,uniform,growth,during,ageing,Consequently,ultra,yield,ultimate,tensile,respectively,achieved,was,attributed,dispersion,undamaged,fine,dispersed,precipitations,work,hardening,effect,This,demonstrated,could,act,feasible,strategy,preparing,performance

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