Materials Science and Metallurgy Course A: Metals & Alloys

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Presentation transcript:

Materials Science and Metallurgy Course A: Metals & Alloys Part IB Materials Science and Metallurgy Course A: Metals & Alloys Professor Harry Bhadeshia Lecture 11: Metallic Alloys

Transformation plasticity TRIP-Steels Dual-Phase Steels Cast Irons Aluminium alloys

DISPLACIVE RECONSTRUCTIVE

Olson and Hartman, 1982

Olson and Hartman, 1982

Olson and Hartman, 1982

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.

s 50 mm Bhadeshia, 1982

TRIP-Assisted Steels for Automobiles

TRIP-assisted steel Bhadeshia, Honeycombe, 2006

R. N. Parkins

Dual-phase ferrite-martensite steels Bhadeshia, Honeycombe, 2006

Flake graphite, grey cast-iron

Three-dimensional shape of graphite (adapted from Underwood)

Spheroidal graphite cast-iron

Hypoeutectic white cast-iron DoITPoMS micrograph library

beverage cans Al-Mn or Al-Mn-Mg solid solution strengthening precipitation strengthening beverage cans Al-Mn or Al-Mn-Mg

Aluminium-lithium alloys

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