TY - JOUR
T1 - Effects of Ta addition on the microstructure and mechanical properties of Ti40Zr25Ni8Cu9Be18 amorphous alloy
AU - Mei, Jinna
AU - Li, Jinshan
AU - Kou, Hongchao
AU - Hu, Rui
AU - Fu, Hengzhi
AU - Zhou, Lian
PY - 2007/6
Y1 - 2007/6
N2 - The effects of Ta addition on the microstructure and mechanical properties of Ti40Zr25Ni8Cu9Be18 bulk amorphous alloy were investigated by using X-ray diffraction (XRD), transmission electron microscopy (TEM), scan electron microscopy (SEM) and compressive testing. As a result, the addition of Ta (0-8at%) prompted the successive precipitation of quasicrystalline phase, CuTi2 phase and bcc β-Ti solid solution. Additionally, the addition of less Ta content (3at%-5at%) led to the formation of amorphous matrix/nanoquasicrystal/CuTi2 complex phase structure; and nanoquasicrystals, as reinforcement precipitates, improved the fracture strength of Ti-Zr-Ni-Cu-Be-Ta alloys, which led to the high compressive fracture strength 1856 MPa of Ta5 alloy. With increasing Ta content (5at%-8at%), although the ductile dendritic β-Ti solid solution was precipitated, the strength and plasticity decreased to a great extent resulting from the growth of quasicrystalline phase and CuTi2 phase.
AB - The effects of Ta addition on the microstructure and mechanical properties of Ti40Zr25Ni8Cu9Be18 bulk amorphous alloy were investigated by using X-ray diffraction (XRD), transmission electron microscopy (TEM), scan electron microscopy (SEM) and compressive testing. As a result, the addition of Ta (0-8at%) prompted the successive precipitation of quasicrystalline phase, CuTi2 phase and bcc β-Ti solid solution. Additionally, the addition of less Ta content (3at%-5at%) led to the formation of amorphous matrix/nanoquasicrystal/CuTi2 complex phase structure; and nanoquasicrystals, as reinforcement precipitates, improved the fracture strength of Ti-Zr-Ni-Cu-Be-Ta alloys, which led to the high compressive fracture strength 1856 MPa of Ta5 alloy. With increasing Ta content (5at%-8at%), although the ductile dendritic β-Ti solid solution was precipitated, the strength and plasticity decreased to a great extent resulting from the growth of quasicrystalline phase and CuTi2 phase.
KW - bulk amorphous alloy
KW - mechanical properties
KW - microstructure
KW - Ti-based amorphous alloy
UR - http://www.scopus.com/inward/record.url?scp=36148945645&partnerID=8YFLogxK
U2 - 10.1016/S1005-8850(07)60103-0
DO - 10.1016/S1005-8850(07)60103-0
M3 - 文章
AN - SCOPUS:36148945645
SN - 1005-8850
VL - 14
SP - 31
EP - 35
JO - Journal of University of Science and Technology Beijing: Mineral Metallurgy Materials (Eng Ed)
JF - Journal of University of Science and Technology Beijing: Mineral Metallurgy Materials (Eng Ed)
IS - SUPPL. 1
ER -