New strategy for enhancing the strength and toughness of Ti-Al metallic-intermetallic laminated composites:Constructing multiple heterostructures using Ni foil  

作　　者：Pengfei Zhou Meini Yuan Mengye Jia Xin Pei Yang Wang Wei Yang Honglin Wang Yuhong Zhao 

机构地区：[1]School of Mechanical and Electrical Engineering,North University of China,Taiyuan,030051,China [2]School of Aerospace Engineering,North University of China,Taiyuan,030051,China [3]School of Environment and Safety Engineering,North University of China,Taiyuan,030051,China [4]Inner Mongolia Metal Material Research Institute,264003,China [5]School of Materials Science and Engineering,North University of China,Taiyuan,030051,China

出　　处：《Progress in Natural Science:Materials International》2024年第6期1173-1183,共11页自然科学进展·国际材料(英文版)

基　　金：the financial support by National Natural Science Foundation of China(51201155);Natural Science Foundation of Shanxi Province(202203021222074,20210302124213,2012011019-1,2012011007-1);Specialized Research Fund for the Doctoral Program of Higher Education(20101420120006);National Key Research and Development Plan of China(2018YFC1901704);the Rapid Support from the Science and Technology Committee of the Military Commission(80923010403)

摘　　要：In order to simultaneously improve the strength and ductility of Ti-Al metallic-intermetallic laminated(TA-MIL)composites,novel Ti-Al-Ni ternary MIL(TAN-TMIL)composites with multiple heterostructures(HS)were fabricated by adding a 0.02 mm Ni foil behind the Ti and Al foils.The results showed that TAN-600 consisted of the same phases(Ti,Al_(3)Ti,and Al)as TA-600 and additionally produced new Ni Al_(3)and Ni_(2)Al_(3)phases due to the Ni-Al reactions.Furthermore,when the hot-pressing temperature was increased to 650°C,Kirkendall voids appeared in the Al_(3)Ti layer(TA-650)and at the Al_(3)Ti/Ni Al_(3)interface(TAN-650).Compared to TA-MIL composites,the thickness of the Al_(3)Ti layer in the TAN-TMIL composites increased by four times when prepared at 600°C,but decreased by four times when prepared at 650°C.Electron backscatter diffraction(EBSD)and nano-indentation tests revealed that TAN-600 had multiple HS and more high-angle grain boundaries(HAGB),optimizing the structure of TA-600.Importantly,this structural arrangement enhanced the interface effects and compressive properties of TAN-600.Tensile testing indicated that the crack-free NiAl_(3)/Ni_(2)Al_(3)layer contributed to the strength of TAN-600,ensuring multi-directional fracture in the Al_(3)Ti layer.This research provides insights for improving the strength and toughness of TA-MIL composites.

关 键 词：Laminated composites Ti-Al-Ni ternary system Multiple heterostructures Microstructure evolution Mechanical properties 

分 类 号：TB33[一般工业技术—材料科学与工程]