... toughness of the near-nanocrystalline coating prevented brittle fracture of the coating surface. SEM micrographs comparing near-nanocrystalline WC-17Co powder particles ( a ) after mechanical alloying and spray drying; ( b ) after cobalt outer coating; with ( c ) microcrystalline WC-17Co powder...

... geometry, specific cutting energy, and critical depth of cut at the onset of ductile-to-brittle cutting transition. As the cutting depth increases, groove geometry clearly reveals the ductile-to-brittle transition from the plastic deformation to a brittle fracture state. The material size effect...

... nanocomposites magnesium silicon compounds alumina powder metallurgy extrusion porosity nanoparticles thermomechanical treatment thermal expansion hardness ductility fractography brittle fracture hybrid composites nanocomposites magnesium mechanical properties coefficient of thermal...

... predicted on the basis of neither the material strength concept nor linear elastic fracture mechanics (LEFM). It follows that nonlinear cohesive (quasi-brittle) fracture mechanics, or its approximation by equivalent LEFM, must be used to predict failure realistically. Based on analogy with the previous...

... microstructure notch testing fatigue testing brittle fracture slip grain boundaries surface cracks optical microscopy The application of damage tolerance methods to high cycle fatigue (HCF) is hindered by the anomalous behavior of microstructurally “short” cracks that can control fatigue life...

... by: A. Pelegri. 14 April 2004 29 June 2004 22 02 2005 aluminium silicon compounds particle reinforced composites plastic deformation micromechanics finite element analysis fracture mechanics ductile fracture voids (solid) brittle fracture stress-strain relations quenching...

... hardening type constitutive law (dotted line). Murakami–Ohno law predicts experimental creep strain variation more accurately than the traditional strain hardening law. 16 06 2003 03 02 2005 grain boundaries brittle fracture creep failure analysis stress analysis work hardening...

... and a 17% Si-Al alloys. Rupture occurred in the primary creep regime, with the eutectic alloy having the longest times to failure. Primary creep was modeled by J t = A + Bt n with A, B, and n dependent on stress. Poor creep performance is linked to the brittle fracture of the primary silicon phase as well...

... brittle fracture fracture toughness plastic deformation hydrogen embrittlement nucleation Hydrogen embrittlement of cylindrical tensile or notched bend specimens of nickel-base alloys 690 and X-750 4 5 is characterized by a predominantly intergranular fracture mechanism that involves...

... received April 11, 2003. Associate Editor: M. Zhou. 03 September 2002 11 April 2003 22 01 2004 fracture mechanics reviews failure (mechanical) ductile fracture brittle fracture Solid materials have long posed special problems for physical characterization, whether...

..., manufactured of 2 1/4 Cr-1Mo steel. Figure 1 presents a drawing of the components of the petrochemical cracking unit. cracks welding creep fracture precipitation grain boundary segregation brittle fracture embrittlement alloy steel petroleum industry heat treatment 15 October 1999...

... April 1999 14 October 1999 fatigue cracks ductile fracture brittle fracture carbon steel forging In the fatigue crack propagation corresponding to the Paris regime, together with the conventional fatigue mechanisms, other processes of static nature can take place in some...