Observations of a grain boundary phase transformation induced by solute segregation

Conference · · TMS (The Metallurgical Society) Paper Selection; (USA)

OSTI ID:5451524

Sickafus,; K,; Sass, S L ^[1]

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1. Cornell Univ., Ithaca, NY (USA)

(001) twist boundaries were manufactured by sintering together (001) single crystal Fe films doped with small concentrations of Au solute. The films were oriented prior to sintering to produce bicrystals with misorientation angles in the range 0.5{degree} to 2.5{degree}. The Au solute concentrations in these films ranged from {approximately}0.1 at.% Au to {approximately}1.0 at.% Au. Initial observations of such bicrystals showed that Au solute may induce a transformation in grain boundary structure from a <110>-oriented grain boundary dislocation array, characteristic of clean Fe low angle twist boundaries, to a <100>-oriented grain boundary dislocation array. However, recent observations of similar bicrystals demonstrate that this transformation is very sensitive to Au solute concentration and misorientation angle. Results are shown on the effects of these parameters on the boundary structure.

• OSTI ID: 5451524
• Report Number(s): CONF-840909--
• Journal Information: TMS (The Metallurgical Society) Paper Selection; (USA), Journal Name: TMS (The Metallurgical Society) Paper Selection; (USA) Vol. 56; ISSN TMPSA; ISSN 0197-1689
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals &amp; Alloys-- Structure &amp; Phase Studies
CRYSTAL STRUCTURE
DISPERSIONS
DOPED MATERIALS
ELEMENTS
FABRICATION
FILMS
GOLD
GRAIN BOUNDARIES
IRON
MATERIALS
METALS
MICROSTRUCTURE
MIXTURES
ORIENTATION
PHASE TRANSFORMATIONS
SEGREGATION
SINTERING
SOLID SOLUTIONS
SOLUTIONS
TRANSITION ELEMENTS