Probing nanoscale damage gradients in ion-irradiated metals using spherical nanoindentation

Siddhartha Pathak; Surya R Kalidindi; Jordan S Weaver; Yongqiang Wang; Russell P Doerner; Nathan A Mara

doi:10.1038/s41598-017-12071-6

Probing nanoscale damage gradients in ion-irradiated metals using spherical nanoindentation

Sci Rep. 2017 Sep 20;7(1):11918. doi: 10.1038/s41598-017-12071-6.

Authors

Siddhartha Pathak¹, Surya R Kalidindi², Jordan S Weaver³, Yongqiang Wang⁴, Russell P Doerner⁵, Nathan A Mara^{3

6}

Affiliations

¹ Chemical and Materials Engineering, University of Nevada, Reno, NV, 89557, USA. spathak@unr.edu.
² George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia, GA, 30332, USA.
³ Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA.
⁴ Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA.
⁵ Center for Energy Research, University of California at San Diego, La Jolla, CA, 92093, USA.
⁶ Institute for Materials Science, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA.

Abstract

We discuss and demonstrate the application of recently developed spherical nanoindentation stress-strain protocols in characterizing the mechanical behavior of tungsten polycrystalline samples with ion-irradiated surfaces. It is demonstrated that a simple variation of the indenter size (radius) can provide valuable insights into heterogeneous characteristics of the radiation-induced-damage zone. We have also studied the effect of irradiation for the different grain orientations in the same sample.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.
Research Support, Non-U.S. Gov't