Related Experiment Video
Updated: May 11, 2026

Determining the Mechanical Strength of Ultra-Fine-Grained Metals
Published on: November 22, 2021
Effect of crystallographic orientation on subcritical grain boundary cracking in a conventionally cast
Kameshwaran Swaminathan1, John E Blendell, Kevin P Trumble
1School of Materials Engineering, Purdue University, West Lafayette, IN 47906, USA. kamesh@purdue.edu
Abstract:
The role of grain orientation and grain boundary misorientation on the formation of subcritical grain boundary cracks in creep of a conventionally cast nickel-based superalloy has been studied. The crystallographic orientations of the grains adjacent to grain boundaries normal to the tensile axis were measured using electron backscattered diffraction. The difference in the Schmid factor for the {111} <112> slip system between the grains was compared to the occurrence of grain boundary cracking. In addition, the difference in the amount of potential primary creep was calculated. The cracked grain boundaries were found to have a larger difference in Schmid factor, as well as a larger difference in potential primary creep, compared with uncracked grain boundaries.
Related Concept Videos
Imperfections in Crystal Structure: Non-Stoichiometric Defects
Imperfections in Crystal Structure: Stoichiometric Point Defects
Microcracking in Concrete
Imperfections in Crystal Structure: Point, Line and Plane Defects
Yield Criteria for Ductile Materials under Plane Stress
The Maximum Shearing Stress Criterion, also known as the...
Metallic Solids
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...

