Thermally induced microstrain broadening in hexagonal zinc

Journal Article · Tue Jan 01 00:00:00 EST 2008 · Zeitschrift fur Kristallographie supplement

OSTI ID:960950

Lawson, Andrew C ^[1]; Valdez, James A ^[1]; Roberts, Joyce A ^[1]; Leineweber, Andreas ^[2]; Mittemeijer, E J ^[2]; Kreher, W ^[3]

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1. Los Alamos National Laboratory
2. STUTTGART, GERMANY
3. DRESDEN UNIV

Neutron powder-diffraction experiments on polycrystalline hexagonal zinc show considerable temperature-dependent line broadening. Whereas as-received zinc at 300 K exhibits narrow reflections, during cooling to a minimum temperature of 10K considerable line-broadening appears, which largely disappears again during reheating. The line broadening may be ascribed to microstrains induced by thermal microstresses due to the anisotropy of the thermal expansion (shrinkage) of hexagonal zinc. Differences between the thermal microstrains and theoretical predictions considering elastic deformation of the grains can be explained by plastic deformation and surface effects.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 960950
• Report Number(s): LA-UR-08-06746; LA-UR-08-6746; TRN: US201008%%854
• Journal Information: Zeitschrift fur Kristallographie supplement, Journal Name: Zeitschrift fur Kristallographie supplement
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
COOLING
DEFORMATION
DIFFRACTION
LINE BROADENING
NEUTRONS
PLASTICITY
PLASTICS
POLYCRYSTALS
POWDERS
SHRINKAGE
SURFACES
TEMPERATURE DEPENDENCE
THERMAL EXPANSION
THERMAL STRESSES
ZINC