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

Sun, Qiaoyan and Guo, Qiang and Yao, Xi and Xiao, Lin and Greer, Julia R. and Sun, Jun (2011) Size effects in strength and plasticity of single-crystalline titanium micropillars with prismatic slip orientation. Scripta Materialia, 65 (6). pp. 473-476. ISSN 1359-6462. http://resolver.caltech.edu/CaltechAUTHORS:20110906-090719350

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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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.scriptamat.2011.05.033DOIArticle
http://www.sciencedirect.com/science/article/pii/S1359646211003162PublisherArticle
ORCID:
AuthorORCID
Greer, Julia R.0000-0002-9675-1508
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).
Group:Kavli Nanoscience Institute
Funders:
Funding AgencyGrant Number
NSFC (China)50771080
NSFC (China)50831004
NSFC (China)51071118
973 program of China2007CB613804
973 program of China2010CB631003
111 Project of ChinaB06025
NSF DMR-0748267
Subject Keywords:Titanium; Size effects; Prismatic slip; Dislocations; Mechanical properties
Record Number:CaltechAUTHORS:20110906-090719350
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20110906-090719350
Official Citation:Qiaoyan Sun, Qiang Guo, Xi Yao, Lin Xiao, Julia R. Greer, Jun Sun, Size effects in strength and plasticity of single-crystalline titanium micropillars with prismatic slip orientation, Scripta Materialia, Volume 65, Issue 6, September 2011, Pages 473-476, ISSN 1359-6462, DOI: 10.1016/j.scriptamat.2011.05.033. (http://www.sciencedirect.com/science/article/pii/S1359646211003162)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:25226
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:06 Sep 2011 16:26
Last Modified:23 Aug 2016 10:05

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