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

Journal Article · · Acta Materialia
 [1];  [2];  [3];  [4];  [2];  [5];  [3]
  1. Arizona State Univ., Tempe, AZ (United States). Materials Science and Engineering Program; DOE Office of Scientific and Technical Information (OSTI)
  2. IMDEA Materials Inst., Madrid (Spain)
  3. Arizona State Univ., Tempe, AZ (United States). Materials Science and Engineering Program
  4. IMDEA Materials Inst., Madrid (Spain); Polytechnic Univ. of Madrid (Spain)
  5. Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Mechanical Engineering

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.

Research Organization:
Univ. of New Mexico, Albuquerque, NM (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC)
Grant/Contract Number:
AC52-06NA25396; AC04-94AL85000
OSTI ID:
1418521
Alternate ID(s):
OSTI ID: 1425699
Journal Information:
Acta Materialia, Journal Name: Acta Materialia Journal Issue: C Vol. 114; ISSN 1359-6454
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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