Microstructure and mechanical behavior of porous sintered steels

Research output: Contribution to journalArticle

273 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)98-112
Number of pages15
JournalMaterials Science and Engineering A
Volume390
Issue number1-2
DOIs
StatePublished - Jan 15 2005

Keywords

  • Fatigue
  • Fe-Mo-Ni steel
  • Finite element analysis
  • Powder metallurgy
  • Tensile

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Microstructure and mechanical behavior of porous sintered steels'. Together they form a unique fingerprint.

  • Cite this