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Title: Intergranular degradation assessment via random grain boundary network analysis

Patent ·
OSTI ID:874473
 [1];  [2];  [1]
  1. San Ramon, CA
  2. Pleasanton, CA
+ Show Author Affiliations

A method is disclosed for determining the resistance of polycrystalline materials to intergranular degradation or failure (IGDF), by analyzing the random grain boundary network connectivity (RGBNC) microstructure. Analysis of the disruption of the RGBNC microstructure may be assess the effectiveness of materials processing in increasing IGDF resistance. Comparison of the RGBNC microstructures of materials exposed to extreme operating conditions to unexposed materials may be used to diagnose and predict possible onset of material failure due to

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
DOE Contract Number:
W-7405-ENG-48
Assignee:
The United States of America as represented by the Department of Energy (Washington, DC)
Patent Number(s):
US 6397682
OSTI ID:
874473
Country of Publication:
United States
Language:
English

References (10)

Grain-boundary structure effects on intergranular stress corrosion cracking of alloy X-750 journal December 1996
Combination Rule of Σ Values at Triple Junctions in Cubic Polycrystals journal November 1996
The Use of Percolation Theory to Predict the Probability of Failure of Sensitized, Austenitic Stainless Steels by Intergranular Stress Corrosion Cracking journal August 1989
Ordered structures in random grain boundaries; some geometrical probabilities journal May 1975
The structure of high-angle grain boundaries journal November 1966
Coincidence-site lattices and complete pattern-shift in cubic crystals journal March 1974
Structure-dependence of intergranular corrosion in high purity nickel journal November 1990
A method of determining the coincidence site lattices for cubic crystals journal September 1974
Development of grain misorientation texture, in terms of coincident site lattice structures, as a function of thermomechanical treatments journal May 1989
On annealing twins and CSL distributions in F.C.C. polycrystals journal June 1992

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Related Subjects

intergranular
degradation
assessment
via
random
grain
boundary
network
analysis
method
disclosed
determining
resistance
polycrystalline
materials
failure
igdf
analyzing
connectivity
rgbnc
microstructure
disruption
assess
effectiveness
processing
increasing
comparison
microstructures
exposed
extreme
operating
conditions
unexposed
diagnose
predict
onset
material
due
grain boundary
polycrystalline material
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