TY - JOUR
T1 - Mechanisms and FEM simulation of chip formation in orthogonal cutting in-situ TiB2/7050Al MMC
AU - Xiong, Yifeng
AU - Wang, Wenhu
AU - Jiang, Ruisong
AU - Lin, Kunyang
AU - Shao, Mingwei
N1 - Publisher Copyright:
© 2018 by the authors.
PY - 2018/4/15
Y1 - 2018/4/15
N2 - The in-situ TiB2/7050Al composite is a newkind of Al-based metal matrix composite (MMC) with super properties, such as low density, improved strength, and wear resistance. This paper, for a deep insight into its cutting performance, involves a study of the chip formation process and finite element simulation during orthogonal cutting in-situ TiB2/7050Al MMC. With chips, material properties, cutting forces, and tool geometry parameters, the Johnson-Cook (J-C) constitutive equation of in-situ TiB2/7050Al composite was established. Then, the cutting simulation model was established by applying the Abaqus-Explicit method, and the serrated chip, shear plane, strain rate, and temperature were analyzed. The experimental and simulation results showed that the obtained material's constitutive equation was of high reliability, and the saw-tooth chips occurred commonly under either low or high cutting speed and small or large feed rate. From result analysis, it was found that the mechanisms of chip formation included plastic deformation, adiabatic shear, shearing slip, and crack extension. In addition, it was found that the existence of small, hard particles reduced the ductility of the MMC and resulted in segmental chips.
AB - The in-situ TiB2/7050Al composite is a newkind of Al-based metal matrix composite (MMC) with super properties, such as low density, improved strength, and wear resistance. This paper, for a deep insight into its cutting performance, involves a study of the chip formation process and finite element simulation during orthogonal cutting in-situ TiB2/7050Al MMC. With chips, material properties, cutting forces, and tool geometry parameters, the Johnson-Cook (J-C) constitutive equation of in-situ TiB2/7050Al composite was established. Then, the cutting simulation model was established by applying the Abaqus-Explicit method, and the serrated chip, shear plane, strain rate, and temperature were analyzed. The experimental and simulation results showed that the obtained material's constitutive equation was of high reliability, and the saw-tooth chips occurred commonly under either low or high cutting speed and small or large feed rate. From result analysis, it was found that the mechanisms of chip formation included plastic deformation, adiabatic shear, shearing slip, and crack extension. In addition, it was found that the existence of small, hard particles reduced the ductility of the MMC and resulted in segmental chips.
KW - Al metal matrix composite
KW - Chip formation
KW - FEM simulation
KW - In-situ
KW - TiB particle
UR - http://www.scopus.com/inward/record.url?scp=85045529212&partnerID=8YFLogxK
U2 - 10.3390/ma11040606
DO - 10.3390/ma11040606
M3 - 文章
AN - SCOPUS:85045529212
SN - 1996-1944
VL - 11
JO - Materials
JF - Materials
IS - 4
M1 - 606
ER -