Module 1: The Power of Metal in the Andean World

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Professor Heather Lechtman

MONDAY 6 June

Lecture 8:30-11:30 am

-- Metallurgy of the New World and the Old World: societies, metals, and materials properties
-- Extractive metallurgy: direct smelting of oxide ores
-- Physical metallurgy: crystallinity; phase diagrams; solid solution freezing; microsegregation (coring)

Laboratory 1-5 pm

(a) Interpretation of metallic microstructures (16-536)
(b) Smelting copper oxide ore (4-003)

Video 5:15 pm

PBS Odyssey film: The Incas (approx. 1 hr.) (16-602)

TUESDAY 7 June

Lecture 8:30-11:30 am

-- Andean sheet metal tradition vs. Central/Mesoamerican casting tradition: plastic deformation in Andean metalworking design
-- Physical metallurgy: dendrite formation; corrosion products; large ingot solidification; eutectic solidification

Laboratory 1-5 pm

(a) Interpretation of metallic microstructures (16-536)
(b) Preparation of sand mould for casting of Cu-Ag alloy bar ingots; melting and pouring Cu-Ag ingots (4-003)

Blacksmithing 7 pm

Toby Bashaw: demonstration of blacksmithing techniques (4-003)

WEDNESDAY 8 June

Lecture 8:30-11:30 am

-- Color: the focus of Andean alloy development; surface enrichment techniques
-- Physical metallurgy: plastic deformation; slip via dislocation movement; strain hardening; metallic microstructures
-- Video: Experiments with Bubble Model of a Metal Structure

Laboratory 1-5 pm

(a) Interpretation of metallic microstructures (16-536)
(b) Begin working and annealing copper bar; prepare Cu-Ag ingots for plastic deformation (4-003)

Video 5:15 pm

PBS Nova film: Inca (approx. 1 hr.)

THURSDAY 9 June

Lecture 8:30-11:30 am

-- Color and planarity: cloth, metal, and the culture of technology
-- Physical metallurgy: annealing and recrystallization; metallic microstructures

Laboratory 1-5 pm

(a) Interpretation of metallic microstructures (16-536)
(b) Working, annealing, pickling Cu-Ag alloy bars to plastically deform them and to develop enriched silver surfaces (4-003)

Video 5:15 pm

The Gunsmith of Williamsburg

FRIDAY 10 June

Lecture 8:30-11:30 am

-- The power of metal in the Andean world: tumbaga vs. bronze
-- Bronze metallurgy: mechanical and physical properties of bronzes; smelting and preparation of bronze alloys

Laboratory 1-5 pm

(a) Interpretation of metallic microstructures (16-536)
(b) Continue plastic deformation of Cu-Ag bars (4-003)