Grain Boundary Pinning by Particles

Paulo Rangel Rios; Gláucio Soares da Fonseca

doi:10.4028/www.scientific.net/MSF.638-642.3907

Paper Titles

Thermomechanical Process Innovation via Computer Modeling and Simulation
p.3883

Failure Analysis of a Hammer Drill Shaft under Complex Loading Paths and Severe Environmental Conditions
p.3889

Fracture Process of Aluminum/Aluminum Nitride Interfaces during Thermal Cycling
p.3895

Metallurgical Investigation on Low Ductility Failures of Cu-ETP Components
p.3901

Grain Boundary Pinning by Particles
p.3907

On the Effects Associated with Control Parameters Delay during Biaxial Cyclic Loading of Engineering Materials
p.3913

Tools and Technologies for Hot Forming with Local Adjustment of Part Properties
p.3919

Simulating Phase Coarsening of Ultra-High Volume Fractions
p.3925

Method of Constraint Loss Correction for CTOD Fracture Toughness under Welding Residual Stress Field
p.3931

HomeMaterials Science ForumMaterials Science Forum Vols. 638-642Grain Boundary Pinning by Particles

Grain Boundary Pinning by Particles

Abstract:

Grain boundary pinning by particles is widely used to prevent grain growth during heat treatment in a variety of commercial alloys. Its practical relevance is matched by a considerable amount of theoretical work that has been devoted this problem. A key issue of boundary pinning is the particle/interface interaction mechanism and its associated pinning force. According to Ashby et al. an interface may interact with a particle in two ways: either it goes through the particles or, more usually, bends round and envelopes the particle. Based on these mechanisms one may derive quantitative expressions relating the characteristics of the particle dispersion and a critical or limiting grain radius. Thus, Zener expression assumes that the interface goes through the particles whereas Rios expression assumes that the interface bends round and envelopes the particle. Both the mechanisms and the resulting expressions are discussed here in detail and compared with available experimental data.