caa a22 4500 463229991 CHVBK 20180405153239.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s10853-006-1382-z doi (NATIONALLICENCE)springer-10.1007/s10853-006-1382-z The relationship between fracture toughness and microstructure of fully lamellar TiAl alloy [Elektronische Daten] [R. Zheng, G. Cheng, X. Li, G. CAO, L. Fu, Y. Zhang, C. Chen] Fully lamellar (FL) Ti-46.5Al-2Cr-1.5Nb-1V (at%) alloy is used to study the relationship between microstructure and fracture toughness. A heat treatment process is adopted to control the microstructural parameters of the studied alloy. Fracture toughness experiments and scanning electron microscope (SEM) in-situ straining experiments are carried out to determine the influence of lamellar spacing and grain size on the fracture toughness of FL TiAl alloys. It is found that ligament length depends on the lamellar spacing, and fracture toughness varies non-monotonously with the increase of grain size. The results are ascribed to the competition between the microcrack nucleation and microcrack propagation. Finally a semi-empirical relationship between the fracture toughness and microstructure parameters was established. Springer Science+Business Media, LLC, 2007 Zheng R. Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, Institute of Low Energy Nuclear Physics, Beijing Normal University, 100875, Beijing, China aut Cheng G. Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, Institute of Low Energy Nuclear Physics, Beijing Normal University, 100875, Beijing, China aut Li X. Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, Institute of Low Energy Nuclear Physics, Beijing Normal University, 100875, Beijing, China aut CAO G. Department of Materials Science and Engineering, Beijing University of Aeronautics & Astronautics, 100083, Beijing, China aut Fu L. Department of Materials Science and Engineering, Beijing University of Aeronautics & Astronautics, 100083, Beijing, China aut Zhang Y. Department of Materials Science and Engineering, Beijing University of Aeronautics & Astronautics, 100083, Beijing, China aut Chen C. Department of Materials Science and Engineering, Beijing University of Aeronautics & Astronautics, 100083, Beijing, China aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/4(2007-02-01), 1251-1260 0022-2461 42:4<1251 2007 42 10853 https://doi.org/10.1007/s10853-006-1382-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1382-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zheng R. Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, Institute of Low Energy Nuclear Physics, Beijing Normal University, 100875, Beijing, China aut NATIONALLICENCE 700 1- Cheng G. Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, Institute of Low Energy Nuclear Physics, Beijing Normal University, 100875, Beijing, China aut NATIONALLICENCE 700 1- Li X. Key Laboratory of Radiation Beam Technology and Materials Modification of Ministry of Education, Institute of Low Energy Nuclear Physics, Beijing Normal University, 100875, Beijing, China aut NATIONALLICENCE 700 1- CAO G. Department of Materials Science and Engineering, Beijing University of Aeronautics & Astronautics, 100083, Beijing, China aut NATIONALLICENCE 700 1- Fu L. Department of Materials Science and Engineering, Beijing University of Aeronautics & Astronautics, 100083, Beijing, China aut NATIONALLICENCE 700 1- Zhang Y. Department of Materials Science and Engineering, Beijing University of Aeronautics & Astronautics, 100083, Beijing, China aut NATIONALLICENCE 700 1- Chen C. Department of Materials Science and Engineering, Beijing University of Aeronautics & Astronautics, 100083, Beijing, China aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/4(2007-02-01), 1251-1260 0022-2461 42:4<1251 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer