CaltechAUTHORS
  A Caltech Library Service

Cold-temperature deformation of nano-sized tungsten and niobium as revealed by in-situ nano-mechanical experiments

Lee, Seok-Woo and Cheng, YinTong and Ryu, Ill and Greer, Julia R. (2014) Cold-temperature deformation of nano-sized tungsten and niobium as revealed by in-situ nano-mechanical experiments. Science China Technological Sciences , 57 (4). pp. 652-662. ISSN 1674-7321. http://resolver.caltech.edu/CaltechAUTHORS:20140603-101604423

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20140603-101604423

Abstract

We constructed and developed an in-situ cryogenic nanomechanical system to study small-scale mechanical behavior of materials at low temperatures. Uniaxial compression of two body-centered-cubic (bcc) metals, Nb and W, with diameters between 400 and 1300 nm, was studied at room temperature and at 165 K. Experiments were conducted inside of a Scanning Electron Microscope (SEM) equipped with a nanomechanical module, with simultaneous cooling of sample and diamond tip. Stress-strain data at 165 K exhibited higher yield strengths and more extensive strain bursts on average, as compared to those at 298 K. We discuss these differences in the framework of nano-sized plasticity and intrinsic lattice resistance. Dislocation dynamics simulations with surface-controlled dislocation multiplication were used to gain insight into size and temperature effects on deformation of nano-sized bcc metals.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1007/s11431-014-5502-8DOIArticle
http://link.springer.com/article/10.1007%2Fs11431-014-5502-8PublisherArticle
http://rdcu.be/twjlPublisherFree ReadCube access
ORCID:
AuthorORCID
Greer, Julia R.0000-0002-9675-1508
Additional Information:© 2014 Science China Press and Springer-Verlag Berlin Heidelberg. Received February 2, 2014; accepted February 28, 2014. The authors gratefully acknowledge the financial support of the Kavli Nanoscience Institute (KNI) through LEE Seok-Woo’s prized post-doctoral fellowship, of the Keck Institute for Space Studies at Caltech, and of JRG’s NASA Early Career grant. CHENG YinTong acknowledges the financial support of the Caltech SURF program.
Group:Kavli Nanoscience Institute, Keck Institute for Space Studies
Funders:
Funding AgencyGrant Number
Kavli Nanoscience InstituteUNSPECIFIED
Keck Institute for Space Studies (KISS)UNSPECIFIED
NASAUNSPECIFIED
Caltech Summer Undergraduate Research Fellowship (SURF)UNSPECIFIED
Subject Keywords:dislocation, plasticity, metal, nanopillar, cryogenics
Record Number:CaltechAUTHORS:20140603-101604423
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140603-101604423
Official Citation:Lee S W, Cheng Y T, Ryu I, et al. Cold-temperature deformation of nano-sized tungsten and niobium as revealed by in-situ nano-mechanical experiments . Sci China Tech Sci, 2014, 57: 652-662, doi: 10.1007/s11431-014-5502-8
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46044
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:03 Jun 2014 20:48
Last Modified:16 Jun 2017 22:32

Repository Staff Only: item control page