Design and Rationale for an In Situ Cryogenic Deformation Capability at a Neutron Source

Journal Article · Mon Jun 28 00:00:00 EDT 2004 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1774555· OSTI ID:20653234

Livescu, V; Clausen, B; Sisneros, T; Bourke, M A.M. ^[1]; Woodruff, T R; Vaidyanathan, R ^[2]; Notardonato, W U ^[3]

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1. Los Alamos National Laboratory, Los Alamos, New Mexico, 87545 (United States)
2. University of Central Florida, Orlando, Florida, 32816 (United States)
3. NASA Kennedy Space Center, Kennedy Space Center, Florida, 32899 (United States)

When performed in conjunction with neutron diffraction, in situ loading offers unique insights on microstructural deformation mechanisms. This is by virtue of the penetration and phase sensitivity of neutrons. At Los Alamos National Laboratory room and high temperature (up to 1500 deg. C) polycrystalline constitutive response is modeled using finite element and self-consistent models. The models are compared to neutron diffraction measurements. In doing so the implications of slip and creep to microstructural response have been explored. Recently we have been considering low temperature phenomena. This includes changes in deformation mechanisms such as the increased predilection for twinning over slip. Since this is associated with measurable texture changes as well as microstructural strain effects, it is well suited for study using neutron diffraction. This paper outlines the design and rationale for a cryogenic loading capability that will be used on the Spectrometer for MAterials Research at Temperature and Stress (SMARTS) at the Los Alamos Neutron Science Center (LANSCE)

• OSTI ID: 20653234
• Journal Information: AIP Conference Proceedings, Vol. 711, Issue 1; Conference: CEC 2003: Cryogenic engineering and international cryogenic materials conference on advances in cryogenic engineering, Anchorage, AK (United States), 22-26 Sep 2003; Other Information: DOI: 10.1063/1.1774555; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CREEP
CRYSTAL STRUCTURE
DEFORMATION
DESIGN
FINITE ELEMENT METHOD
LANL
MICROSTRUCTURE
NEUTRON DIFFRACTION
NEUTRON SOURCES
POLYCRYSTALS
SENSITIVITY
SPECTROMETERS
STRAINS
STRESSES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K
TEXTURE
TWINNING