Probing the Effect of Hydrogen on Elastic Properties and Plastic Deformation in Nickel Using Nanoindentation and Ultrasonic Methods
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Southwest Research Inst. (SwRI), San Antonio, TX (United States); Kyushu Univ. (Japan). International Inst. for Carbon-Neutral Energy Research (WPI-I2CNER)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Geomechanics Dept.
- 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
Web of Science
Multiscale analysis of hydrogen-induced softening in f.c.c. nickel single crystals oriented for multiple-slips: elastic screening effect
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journal | September 2019 |
Multiscale analysis of hydrogen-induced softening in f.c.c. nickel single crystals oriented for multiple-slips: elastic screening effect
|
journal | September 2019 |
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