Черновик презентации к защитному слову

1. Physical mechanism of liquid metal embrittlement in the aluminum alloys

Ural Federal University
Institute of Natural Sciences and Mathematics
Physical mechanism of liquid metal
embrittlement in the aluminum
alloys
STUDENT: PERESKOKOVA KSENIA
ACA DE MIC A DV I S OR : P ROF ESSOR ZA I TSEV D.V.

2. Problem

Aerospace
lubrication and cooling
during processing of
refractory materials
Nuclear power industry
cooling of nuclear
reactors
Military industry
the use of complex
alloys with different
melting points of its
elements
The interaction between a solid (blue)
and liquid (gray) metal
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3. The purposes and object of research

Purposes
Systematize the date available
in science and create a
complete model of the
behavior of this pair
Aluminum-gallium
pair
o inexpensive materials;
o a lot of research in different fields;
o strong and rapid embrittlement
effect;
o normal experimental conditions.
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4. Methodology

Cutting the
samples
Methodology
Removal of the
oxide film
7x3x0.9 mm
Exposure to the
gallium
Uniaxial tension
Spark-cutting machine
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5. Results discussions

Stress-strain curves for uniaxial tension: 1 –
specimens in the initial state; 2 – specimens
after exposure to liquid gallium.
Region 1 mm from the region localization/
fracture of a specimen exposed to liquid
gallium.
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6. Discussions

o
Exposure to liquid gallium significantly reduces its mechanical
properties but does not change the type of deformation behavior.
o
The embrittlement process begins to occur even at the stage of
elastic deformation.
o
The embrittlement process proceeds point-by-point over the
entire surface of the sample.
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7. Further research

o to consider other schemes (three-point bend test);
o to study the structure of aluminum and aluminum alloys;
o to identify the dependence on grain size.
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8. Thank you for your attention

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9. Structure

o relevance;
Time: ~ 7 minutes
o purposes of research;
o the object of research;
o methodology;
o results and discussions;
o further research.
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