@article{df10fd3d298049f79981e67485102db1,
title = "Taming the Pseudoelastic Response of Nitinol Using Ion Implantation",
abstract = "Implantation of Ni50.5Ti49.5 wire with 30 MeV Ni6+ ions at doses (< 0.1 DPA) typically smaller than employed in the literature is shown to systematically alter the pseudoelastic response, with extrema in Berkovich nanoindentation load (+50\%), hysteresis (−60\%), and recoverable displacement (−19\%) occurring at ∼ 3.6 μm below the implantation surface. These extraordinary values are attributed to ∼ 10 to 20 nm amorphous clusters that constrain the stress-induced B2-B19′ phase transformation. This is substantiated by phase field simulations of crystalline-amorphous composites and molecular dynamics simulations of crystalline-vacancy cluster composites showing the spatial refinement of martensite caused by nm-scale defects. The results suggest that ion implantation may potentially expand the processing and performance space for NiTi, by creating amorphous defects at smaller length scales than dislocation substructures produced by conventional deformation processing.",
keywords = "Ion implantation, Molecular dynamics, Nanoindentation, Phase field, Pseudoelastic, Shape memory alloy",
author = "Alejandro Hinojos and Daniel Hong and Hariharan Sriram and Longsheng Feng and Chao Yang and Wharry, \{Janelle P.\} and Xuesong Gao and Khalid Hattar and Nan Li and Schaffer, \{Jeremy E.\} and Yunzhi Wang and Mills, \{Michael J.\} and Anderson, \{Peter M.\}",
note = "Work was supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), at The Ohio State University (OSU) under award \#DE-SC0001258 (indentation analysis, characterization, phase field and finite element simulations) and at Purdue University under award \#DE-SC0020150 (molecular dynamics simulations). Material–Fort Wayne Metals (Fort Wayne, IN); Irradiation and nanoindentation experiments–Center for Integrated Nanotechnologies under User Proposals \#2019BC0126 and 2121BC0097; Electron microscopy–OSU Center for Electron Microscopy and Analysis (OSU CEMAS). Computations–the Ohio Supercomputing Center under User Grants PAS0676, PAS0971. PMA also acknowledges support through the Independent Research/Development Program while serving at the U.S. National Science Foundation. This work was performed, in part, at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology \& Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International, Inc. for the U.S. DOE's National Nuclear Security Administration under contract DE-NA-0003525. Los Alamos National Laboratory, an affirmative action equal opportunity employer, is managed by Triad National Security, LLC for the U.S. Department of Energy's NNSA, under contract 89233218CNA000001. The views expressed in the article do not necessarily represent the views of the U.S. DOE or the United States Government. Work was supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), at The Ohio State University (OSU) under award \#DE-SC0001258 (indentation analysis, characterization, phase field and finite element simulations) and at Purdue University under award \#DE-SC0020150 (molecular dynamics simulations). Material–Fort Wayne Metals (Fort Wayne, IN); Irradiation and nanoindentation experiments–Center for Integrated Nanotechnologies under User Proposals \#2019BC0126 and 2121BC0097; Electron microscopy–OSU Center for Electron Microscopy and Analysis (OSU CEMAS). Computations–the Ohio Supercomputing Center under User Grants PAS0676, PAS0971. PMA also acknowledges support through the Independent Research/Development Program while serving at the U.S. National Science Foundation. This work was performed, in part, at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology \& Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International, Inc., for the U.S. DOE's National Nuclear Security Administration under contract DE-NA-0003525. Los Alamos National Laboratory, an affirmative action equal opportunity employer, is managed by Triad National Security, LLC for the U.S. Department of Energy's NNSA, under contract 89233218CNA000001. The views expressed in the article do not necessarily represent the views of the U.S. DOE or the United States Government.",
year = "2023",
month = mar,
day = "15",
doi = "10.1016/j.scriptamat.2022.115261",
language = "English (US)",
volume = "226",
journal = "Scripta Materialia",
issn = "1359-6462",
publisher = "Acta Materialia Inc",
}