Author:
Zhang Jizhe,Yan Pengfei,Yan Biao
Abstract
In this study, Cu and Ni are successfully added to additively manufactured Al-Si alloy by the mixing process to improve the strength and ductility of the alloy. The effects of different heat treatments on the microstructural evolution and bending properties of selective laser-melted Al-Si-Cu-Ni-Fe-Re alloy are systematically investigated to optimize the mechanical properties. Nearly complete dense samples are initially additively manufactured with optimized parameters. The samples display a particular fiber network microstructure in which Cu-rich and Ni-rich phases distribute in an interwoven mesh around the eutectic silicon. After substrate plate heating (SPH) treatment, the network becomes denser, and the bending strength increases by 44.99 ± 1 MPa to 811.11 ± 29 MPa, despite the hardness decreases. Comparatively, solution aging (SQA) treatment results in the fiber network structures transforming into second-phase particles, which leads to a decline in bending strength and a significantly higher degree of ductility. Finally, the mechanisms of changes in microstructure and morphology, as well as mechanical properties after heat treatment, are discussed.
Funder
the International Postdoctoral Exchange Fellowship Program
Subject
General Materials Science,Metals and Alloys
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献