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Title: A high-throughput technique for determining grain boundary character non-destructively in microstructures with through-thickness grains

Journal Article · · npj Computational Materials
ORCiD logo [1];  [2];  [3];  [4];  [5];  [2];  [4];  [6]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Materials and Chemical Engineering 'G Natta', Politecnico di Milano, Milan (Italy)
  3. North Carolina State Univ., Raleigh, NC (United States)
  4. Johns Hopkins Univ., Baltimore, MD (United States)
  5. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  6. Texas A & M Univ., College Station, TX (United States)

Grain boundaries (GBs) govern many properties of polycrystalline materials. However, because of their structural variability, our knowledge of GB constitutive relations is still very limited. We present a novel method to characterise the complete crystallography of individual GBs non-destructively, with high-throughput, and using commercially available tools. This method combines electron diffraction, optical reflectance and numerical image analysis to determine all five crystallographic parameters of numerous GBs in samples with through-thickness grains. We demonstrate the technique by measuring the crystallographic character of about 1,000 individual GBs in aluminum in a single run. Our method enables cost- and time-effective assembly of crystallography–property databases for thousands of individual GBs. Furthermore, such databases are essential for identifying GB constitutive relations and for predicting GB-related behaviours of polycrystalline solids.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0008926
OSTI ID:
1437260
Journal Information:
npj Computational Materials, Journal Name: npj Computational Materials Journal Issue: 1 Vol. 2; ISSN 2057-3960
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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