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Title: Anisotropy, size, and aspect ratio effects on micropillar compression of Al-SiC nanolaminate composites

Metal-ceramic nanolaminate composites show promise as high strength and toughness materials. Micropillar compression was used to characterize the mechanical behavior of AlSiC multilayers in different orientations including loading at 0°, 45° and 90° with respect to the direction of the layers. The 0° orientation showed the highest strength while the 45° orientation showed the lowest strength. Each orientation showed unique deformation behavior. Effects of pillar size and aspect ratio were also studied. Higher compressive strengths were observed in smaller pillars for all orientations. This effect was shown to be due to a lower probability of flaws using Weibull statistics. Additionally, changes in the aspect ratio was shown to have no significant effect on the behavior except an increase in the strain to failure in the 0° orientation. In conclusion, finite element analysis (FEA) was used to simulate and understand the effect of these parameters on the deformation behavior.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ; ORCiD logo [2] ;  [4] ;  [1]
  1. Arizona State Univ., Tempe, AZ (United States). Materials Science and Engineering Program
  2. IMDEA Materials Inst., Madrid (Spain)
  3. IMDEA Materials Inst., Madrid (Spain); Polytechnic Univ. of Madrid (Spain)
  4. Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Mechanical Engineering
Publication Date:
Grant/Contract Number:
AC52-06NA25396; DMR-1209928; AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 114; Journal Issue: C; Journal ID: ISSN 1359-6454
Publisher:
Elsevier
Research Org:
Univ. of New Mexico, Albuquerque, NM (United States)
Sponsoring Org:
National Science Foundation (NSF); USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; Multilayer; Nanocomposite; Orientation dependence; Finite elements; Weibull analysis
OSTI Identifier:
1418521
Alternate Identifier(s):
OSTI ID: 1425699