Between 2 and 3

Question 1

Microstructure

Answer 1

Specified by the number of phases, their proportions, and their arrangement of space in a material.

Question 2

Alloy

Answer 2

A metallic substance that is composed of two or more elements

Question 3

Types of Phase Diagrams

Answer 3

Unary System - one component
Binary System - two components
Solution - one phase with more than 1 component
Mixture - more than one phase

Question 4

Isomorphous

Answer 4

• “single structured”

- Two elements being completely soluble in one another

Question 5

Liquidus Line

Answer 5

Line at which first solid begins to form during solidification

Question 6

Solidus

Answer 6

Line below which all liquid is completely solidified

Question 7

Constitution

Answer 7

Described by:

• Phases present
• Composition of each phase
• weight fraction of each phase

Question 8

Solubility Limit

Answer 8

The maximum concentration of solute that may be added without forming a new phase

Question 9

Eutectic Point

Answer 9

Going from a liquid to 2 solids

Question 10

Lamellae

Answer 10

Alternating layers of alpha and beta

Question 11

Microconstituent

Answer 11

Element of the microstructure having a distinctive structure. Ex: primary alpha and the eutectic structure

Question 12

Hypoeutectic

Answer 12

Primary alpha phase present (less component B than eutectic)

Question 13

Hypereutectic

Answer 13

Primary beta phase present (more component B than eutectic)

Question 14

Eutectoid

Answer 14

Occurs from one solid phase to two new solid phases

Question 15

Constitution Point

Answer 15

Point for alloy composition and temperature

Question 16

Peritectic

Answer 16

alpha + L –> Beta

Question 17

Monotectic

Answer 17

L1 –> L2 + alpha (a liquid phase transforms into a solid phase and another liquid phase)

Question 18

Peritectoid

Answer 18

Alpha + Beta –> Gamma (solid)