Precipitate-induced plasticity enhancement in niobium-hydrogen single crystals
Journal Article
·
· Scripta Materialia
- Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Materials Science and Engineering
Dilute Nb-H alloys which contain 100--400 ppma H contain small, coherent hydrides and are strengthened substantially by these precipitates as expected from appropriate hardening models. Nb-H alloys with 800--4,000 ppma H are less substantially strengthened by Orowan-like hardening mechanisms for semi-coherent or incoherent hydrides. Both prismatic and shear dislocations are generated from these non-coherent hydrides and contribute to reduced flow stresses and enhanced tensile plasticities relative to unalloyed Nb. As a component of the hydride-induced softening process, glissile dislocations can be formed from the prismatic dislocations by a dislocation reaction model proposed by Bernstein, Hirth and Hwang.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- OSTI ID:
- 651137
- Report Number(s):
- CONF-980202--
- Journal Information:
- Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 4-5 Vol. 39; ISSN 1359-6462; ISSN SCMAF7
- Country of Publication:
- United States
- Language:
- English
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