Part IB

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Part IB Materials Science and Metallurgy Course
A Metals Alloys
Professor Harry Bhadeshia
Lecture 11 Metallic Alloys
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Transformation plasticity TRIP-Steels Dual-Phase
Steels Cast Irons Aluminium alloys
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DISPLACIVE
RECONSTRUCTIVE
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Olson and Hartman, 1982
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Olson and Hartman, 1982
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Olson and Hartman, 1982
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Displacive transformations can be induced by
undercooling.
Martensitic transformation is a deformation
accompanied by a change in crystal structure.
Therefore, martensite can be induced by stress.
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s
50 mm
Bhadeshia, 1982
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TRIP-Assisted Steels for Automobiles
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TRIP-assisted steel
Bhadeshia, Honeycombe, 2006
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R. N. Parkins
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Dual-phase ferrite-martensite steels
Bhadeshia, Honeycombe, 2006
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Flake graphite, grey cast-iron
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Three-dimensional shape of graphite (adapted from
Underwood)
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Spheroidal graphite cast-iron
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Hypoeutectic white cast-iron DoITPoMS micrograph
library
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solid solution strengthening
precipitation strengthening
beverage cans Al-Mn or Al-Mn-Mg
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Aluminium-lithium alloys
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