TY - JOUR
T1 - Micromechanical behavior of single-crystal superalloy with different crystal orientations by microindentation
AU - Li, Jinghui
AU - Li, Fuguo
AU - Dong, Junzhe
AU - Yuan, Zhanwei
AU - Zhang, Shuo
N1 - Publisher Copyright:
© 2015 Jinghui Li et al.
PY - 2015
Y1 - 2015
N2 - In order to investigate the anisotropic micromechanical properties of single-crystal nickel-based superalloy DD99 of four crystallographic orientations, (001), (215), (405), and (605), microindentation test (MIT) was conducted with different loads and loading velocities by a sharp Berkovich indenter. Some material parameters reffecting the micromechanical behavior of DD99, such as microhardness H, Young's modulus E, yield stress Ωγ, strain hardening component n, and tensile strength Ωb, can be obtained from load-displacement relations. H and E of four different crystal planes evidently decrease with the increase of h. The reduction of H is due to dislocation hardening while E is related to interplanar spacing and crystal variable. Ωγ of (215) is the largest among four crystal planes, followed by (605), and (001) has the lowest value. n of (215) is the lowest, followed by (605), and that of (001) is the largest. Subsequently, a simplified elastic-plastic material model was employed for 3D microindentation simulation of DD99 with various crystal orientations. The simulation results agreed well with experimental, which confrmed the accuracy of the simplifed material model.
AB - In order to investigate the anisotropic micromechanical properties of single-crystal nickel-based superalloy DD99 of four crystallographic orientations, (001), (215), (405), and (605), microindentation test (MIT) was conducted with different loads and loading velocities by a sharp Berkovich indenter. Some material parameters reffecting the micromechanical behavior of DD99, such as microhardness H, Young's modulus E, yield stress Ωγ, strain hardening component n, and tensile strength Ωb, can be obtained from load-displacement relations. H and E of four different crystal planes evidently decrease with the increase of h. The reduction of H is due to dislocation hardening while E is related to interplanar spacing and crystal variable. Ωγ of (215) is the largest among four crystal planes, followed by (605), and (001) has the lowest value. n of (215) is the lowest, followed by (605), and that of (001) is the largest. Subsequently, a simplified elastic-plastic material model was employed for 3D microindentation simulation of DD99 with various crystal orientations. The simulation results agreed well with experimental, which confrmed the accuracy of the simplifed material model.
UR - http://www.scopus.com/inward/record.url?scp=84929378433&partnerID=8YFLogxK
U2 - 10.1155/2015/759753
DO - 10.1155/2015/759753
M3 - 文章
AN - SCOPUS:84929378433
SN - 1687-4110
VL - 2015
JO - Journal of Nanomaterials
JF - Journal of Nanomaterials
M1 - 759753
ER -