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Superelastic and micaceous deformation in the intermetallic compound CaFe2As2

Journal Article · · Scripta Materialia
 [1];  [2];  [1];  [1];  [3];  [3];  [1]
  1. Univ. of Connecticut, Storrs, CT (United States)
  2. Colorado State Univ., Fort Collins, CO (United States)
  3. Ames Lab., Ames, IA (United States)

Single-crystalline intermetallic compound CaFe2As2 are known to exhibit both superelasticity and micaceous plasticity, but these phenomena have not been studied in detail. Here we report a study of the elastic and plastic deformation behaviors for CaFe2As2 single crystals grown in Sn-flux solution. The anisotropic mechanical response has been studied using micropillar compression tests performed in-situ within a scanning electron microscope. Further, these data are compared with density functional theory calculations to develop an understanding of micaceous plasticity in terms of strongly anisotropic generalized stacking fault energies. The results of this work will offer design guidelines to produce mechanically robust superelastic structures.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
National Aeronautics and Space Administration (NASA); FEI Company; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1434320
Alternate ID(s):
OSTI ID: 1549656
OSTI ID: 22729492
Report Number(s):
IS-J-9474; PII: S1359646217304098
Journal Information:
Scripta Materialia, Journal Name: Scripta Materialia Vol. 141; ISSN 1359-6462
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (4)


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