CaltechAUTHORS
Published September 2011 | Version public
Journal Article Metadata-only

Size effects in strength and plasticity of single-crystalline titanium micropillars with prismatic slip orientation

Creators

  • 1. ROR icon Xi'an Jiaotong University
  • 2. ROR icon California Institute of Technology

Abstract

We present results of uniaxial compression experiments on rectangular prismatic titanium micropillars loaded along [1120]. We find that flow stress increases significantly with decreasing pillar size down to 300 nm, with a slope of -0.5 on the log–log scale. The strength of 300 nm pillars is 1040 MPa, reaching 16% of the theoretical strength of titanium. We observe wavy lines for samples with diameters greater than 1 µm. The critical resolved shear stress is inversely proportional to the sample size, consistent with dislocation source nucleation-controlled plasticity.

Additional Information

© 2011 Acta Materialia Inc. Published by Elsevier Ltd. Received 5 March 2011; revised 30 May 2011; accepted 30 May 2011. Available online 12 June 2011. The present work is financially supported by the Grants from NSFC (50771080, 50831004, 51071118), the 973 program of China (2007CB613804, 2010CB631003) and the 111 Project of China (B06025). The authors thank Dr Ping Huang for nanoindentation experiments. We also gratefully acknowledge Kavli Nanoscience Institute at Caltech and the financial support from NSF CAREER Grant (DMR-0748267).

Additional details

Identifiers

Eprint ID
25226
Resolver ID
CaltechAUTHORS:20110906-090719350

Funding

NSFC (China)
50771080
NSFC (China)
50831004
NSFC (China)
51071118
973 program of China
2007CB613804
973 program of China
2010CB631003
111 Project of China
B06025
NSF
DMR-0748267

Dates

Created
2011-09-06
Created from EPrint's datestamp field
Updated
2021-11-09
Created from EPrint's last_modified field

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Caltech groups
Kavli Nanoscience Institute