摘要
1.Introduction Additive manufacturing or 3D printing outweighs conventional casting methods in the aspect of complex parts fabrication,which can realize one-step formation without the need of complicated cast dies.3D printing significantly promotes industrial production for making near-net shaped components.However,this promising technique is not always ideally applicable for metals and alloys.For example,titanium alloys prepared by 3D printing often suf-fer from poor plasticity,and usually require further complex heat treatment or hot isostatic pressing treatment,in order to remove internal stress and regulate plasticity and strength[1,2],which de-feats the original intention of employing additive manufacturing.One of the fundamental causes for such issues is the low fluidity of the alloys upon melting,leading to great chemical heterogeneity,high porosity content and residual stresses.This limitation hinders further design and fabrication of high-performance printable alloys from large scale production and application.
基金
supported by the National Natural Science Foundation of China(Nos.51822402,51971248,52101147 and U20A20278)
the National Key Research and Development Program of China(No.2019YFA0209901 and 2018YFA0702901)
the Liao Ning Revitalization Talents Program(No.XLYC1807047)
the Natural Science Foundation of Jiangsu Province(No.BK20210726)
the Fund of the State Key Laboratory of Solidification Process-ing in NWPU(No.SKLSP201902).
