Abstract
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.
基金项目
authors greatly acknowledge the financial supports from National Key R&D program of China(Grant Number 2017YFB0703103)
Guangdong Province Key Area R&D Program(Grant Number 2019B010942001)
NETL
NSTL
维普
万方数据