Ductile and high strength Cu fabricated by solid-state cold spray additive manufacturing  

作　　者：Chaoyue Chen Yingchun Xie Shuo Yin Wenya Li Xiaotao Luo Xinliang Xie Ruixin Zhao Chunming Deng Jiang Wang Hanlin Liao Min Liu Zhongming Ren 

机构地区：[1]State Key Laboratory of Advanced Special Steels,School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China [2]Institute of New Materials,Guangdong Academy of Sciences,National Engineering Laboratory of Modern Materials Surface Engineering Technology,Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology,Guangzhou 510651,China [3]Trinity College Dublin,The University of Dublin,Department of Mechanical and Manufacturing Engineering,Parsons Building,Dublin 2,Ireland [4]State Key Laboratory of Solidification Processing,Shaanxi Key Laboratory of Friction Welding Technologies,School of Materials Science and Engineering,Northwestern Polytechnical University,Xi’an 710072,China [5]State Key Laboratory for Mechanical Behavior of Materials,School of Materials Science and Engineering,Xi’an Jiaotong University,Xi’an 710049,China [6]Key laboratory for Light-weight Materials,Nanjing Techchnology University,Nanjing 211816,China [7]ICB UMR 6303,CNRS,Univ.Bourgogne Franche-Comté,UTBM,F-90010 Belfort,France

出　　处：《Journal of Materials Science & Technology》2023年第3期234-243,共10页材料科学技术（英文版）

基　　金：the National Natural Science Foundation of China(Nos.52001191,52001078,52061135101);the Shanghai Science and Technology Committee(No.20511107700);Shanghai“Shuguang Program”(No.20SG42);Shanghai Rising-Star Program(No.20QA1403800);Key-Area Research and Development Program of Guangdong Province of China(No.2020B0101330001);Guangzhou Science and Technology Program of China(No.202007020008);the Research Fund of the State Key Laboratory of Solidification Processing(NPU,China)(No.2022-TZ-01);the Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology and the Institute of New Materials,Guangdong Academy of Sciences(No.2020B1212060049).

摘　　要：In this work,pure Cu with excellent strength and ductility(UTS of 271 MPa,elongation to fracture of 43.5%,uniform elongation of 30%)was prepared using cold spray additive manufacturing(CSAM),realizing a breakthrough in the field.An in-depth investigation was conducted to reveal the microstructure evolution,strengthening and ductilization mechanisms of the CSAM Cu,as well as the single splats.The results show that the CSAM Cu possesses a unique heterogeneous microstructure with a bimodal grain structure and extensive infinitely circulating ring-mounted distribution of twinning.Based on the single splat observation,the entire copper particle forms a gradient nano-grained(GNG)structure after high-speed impact deposition.The GNG-structured single splat serves as a unit to build the heterogeneous microstructure with bimodal grain distribution during the successive deposition in CSAM.The results also show that CSAM can achieve synergistic strengthening and ductilization by controlling the grain refinement and dislocation density.This work provides potential for CSAM technique in manufacturing various metallic parts with the desired combination of high strength and good ductility without additional post-treatments.

关 键 词：Cold spray additive manufacturing Copper Heterogeneous microstructure Strength DUCTILITY 

分 类 号：TG174.4[金属学及工艺—金属表面处理]