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Title: Probing the Effect of Hydrogen on Elastic Properties and Plastic Deformation in Nickel Using Nanoindentation and Ultrasonic Methods

Journal Article · · JOM. Journal of the Minerals, Metals & Materials Society
ORCiD logo [1];  [2]; ORCiD logo [3]; ORCiD logo [4]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Southwest Research Inst. (SwRI), San Antonio, TX (United States); Kyushu Univ. (Japan). International Inst. for Carbon-Neutral Energy Research (WPI-I2CNER)
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Geomechanics Dept.
  4. Purdue Univ., West Lafayette, IN (United States). School of Materials Engineering

Hydrogen effects on small-volume plasticity and elastic stiffness constants are investigated with nanoindentation of Ni-201 and sonic velocity measurements of bulk Ni single crystals. Elastic modulus of Ni-201, calculated from indentation data, decreases ~22% after hydrogen charging. This substantial decrease is independently confirmed by sonic velocity measurements of Ni single crystals; c44 decreases ~20% after hydrogen exposure. Furthermore, clear hydrogen-deformation interactions are observed. The maximum shear stress required to nucleate dislocations in hydrogen-charged Ni-201 is markedly lower than in as-annealed material, driven by hydrogen-reduced shear modulus. Additionally, a larger number of depth excursions are detected prior to general yielding in hydrogen-charged material, suggesting cross-slip restriction. Together, these data reveal direct correlation between hydrogen-affected elastic properties and plastic deformation in Ni alloys.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC04-94AL85000; NA0002135; SNL-LDRD-173116; NA-0003525; AC52-06NA25396
OSTI ID:
1432790
Alternate ID(s):
OSTI ID: 1473812
Report Number(s):
SAND-2018-2771J; LA-UR-18-20451; 661439
Journal Information:
JOM. Journal of the Minerals, Metals & Materials Society, Vol. 70, Issue 7; ISSN 1047-4838
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

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Cited By (2)