Metal Properties and Alloys Flashcards

What is work hardening in metalworking?

Answer: Hardening through repeated mechanical deformation

Work hardening occurs when repeated bending or hammering disrupts the metal's crystal structure, making it harder and less ductile.

What is the primary purpose of annealing metal during jewelry fabrication?

Answer: To relieve internal stress and restore ductility

Annealing involves heating metal to relieve stress and restore ductility that has been lost through work hardening.

What color should sterling silver glow during annealing to indicate proper temperature?

Answer: Dull red

Sterling silver should reach a dull red glow during annealing, indicating it has reached approximately 1,100–1,200°F.

What is 'pickle' used for in jewelry making?

Answer: An acid solution that removes oxidation after soldering

Pickle is an acidic solution that removes flux residue and oxidation (firescale) from metal after soldering or annealing.

Which process deposits a thin metal layer onto a jewelry piece using electrical current?

Answer: Electroplating

Electroplating uses an electrical current to bond a thin metal layer—such as rhodium, gold, or silver—to the surface of a jewelry piece.

What is the correct sequence of steps when sizing a ring down?

Answer: Cut out excess metal, solder, then file and polish

When sizing a ring down, the excess metal is cut out first, the join is soldered, and then the piece is filed and polished to finish.