TY - JOUR
T1 - Microstructure and mechanical behavior of porous sintered steels
AU - Chawla, Nikhilesh
AU - Deng, X.
N1 - Funding Information:
The authors acknowledge Hoeganaes Corp. for providing the materials and financial support for this research and D. Babic for experimental assistance with this work.
PY - 2005/1/15
Y1 - 2005/1/15
N2 - The microstructure and mechanical properties of sintered Fe-0.85Mo-Ni steels were investigated as a function of sintered density. A quantitative analysis of microstructure was correlated with tensile and fatigue behavior to understand the influence of pore size, shape, and distribution on mechanical behavior. Tensile strength, Young's modulus, strain-to-failure, and fatigue strength all increased with a decrease in porosity. The decrease in Young's modulus with increasing porosity was predicted by analytical modeling. Two-dimensional microstructure-based finite element modeling showed that the enhanced tensile and fatigue behavior of the denser steels could be attributed to smaller, more homogeneous, and more spherical porosity which resulted in more homogeneous deformation and decreased strain localization in the material. The implications of pore size, morphology, and distribution on the mechanical behavior and fracture of P/M steels are discussed.
AB - The microstructure and mechanical properties of sintered Fe-0.85Mo-Ni steels were investigated as a function of sintered density. A quantitative analysis of microstructure was correlated with tensile and fatigue behavior to understand the influence of pore size, shape, and distribution on mechanical behavior. Tensile strength, Young's modulus, strain-to-failure, and fatigue strength all increased with a decrease in porosity. The decrease in Young's modulus with increasing porosity was predicted by analytical modeling. Two-dimensional microstructure-based finite element modeling showed that the enhanced tensile and fatigue behavior of the denser steels could be attributed to smaller, more homogeneous, and more spherical porosity which resulted in more homogeneous deformation and decreased strain localization in the material. The implications of pore size, morphology, and distribution on the mechanical behavior and fracture of P/M steels are discussed.
KW - Fatigue
KW - Fe-Mo-Ni steel
KW - Finite element analysis
KW - Powder metallurgy
KW - Tensile
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U2 - 10.1016/j.msea.2004.08.046
DO - 10.1016/j.msea.2004.08.046
M3 - Article
AN - SCOPUS:10944229965
SN - 0921-5093
VL - 390
SP - 98
EP - 112
JO - Materials Science and Engineering A
JF - Materials Science and Engineering A
IS - 1-2
ER -