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Title: Strong, Ductile, and Thermally Stable bcc-Mg Nanolaminates

Journal Article · · Scientific Reports
 [1]; ORCiD logo [2]; ORCiD logo [2];  [1];  [3]; ORCiD logo [4];  [5]
  1. Univ. of Nevada, Reno, NV (United States). Dept. of Chemical and Materials Engineering
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Chinese Academy of Sciences (CAS), Shenyang (China). Shenyang National Lab. for Materials Science
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United State
  5. Univ. of California, Santa Barbara, CA (United States). Mechanical Engineering Dept., Materials Dept.

Magnesium has attracted attention worldwide because it is the lightest structural metal. However, a high strength-to-weight ratio remains its only attribute, since an intrinsic lack of strength, ductility and low melting temperature severely restricts practical applications of Mg. Through interface strains, the crystal structure of Mg can be transformed and stabilized from a simple hexagonal (hexagonal close packed hcp) to body center cubic (bcc) crystal structure at ambient pressures. Here, we demonstrate that when introduced into a nanocomposite bcc Mg is far more ductile, 50% stronger, and retains its strength after extended exposure to 200°C, which is 0.5 times its homologous temperature. These findings reveal an alternative solution to obtaining lightweight metals critically needed for future energy efficiency and fuel savings.

Research Organization:
Los Alamos National Laboratory (LANL)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-06NA25396; NA0001974; AC02-06CH11357; AC02-06CH11357
OSTI ID:
1392815
Report Number(s):
LA-UR-17-27197
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 7; ISSN 2045-2322
Country of Publication:
United States
Language:
English

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Cited By (7)

High temperature strength retention of Cu/Nb nanolaminates through dynamic strain ageing text January 2020
Elevated and cryogenic temperature micropillar compression of magnesium–niobium multilayer films journal May 2019
Interface Facilitated Reorientation of Mg Nanolayers in Mg-Nb Nanolaminates journal February 2019
Structure and properties of pseudomorphically transformed bcc Mg in Mg/Nb multilayered nanolaminates studied using synchrotron X-ray diffraction journal July 2019
Direct observation of the hcp-bcc phase transition and melting along the principal Hugoniot of Mg journal January 2020
Room temperature deformation mechanisms of Mg/Nb nanolayered composites journal May 2018
Cracking and Toughening Mechanisms in Nanoscale Metallic Multilayer Films: A Brief Review journal October 2018

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