Chapter 11, Problem 11.40P

Interpretation Introduction

(a)

Interpretation:

The pouring temperature needs to be determined, from the provided temperature vs time, cooling curve for Al-Si.

Concept Introduction:

A cooling curve is a schematic representation of phase change of matter, characteristically from liquid to solid or gaseous to solid.

The temperature is plotted on Y-axis.

The time is plotted on X-axis.

In this variable, time is independent variable and temperature is a dependent variable.

The initial point of the graph is designated as 'pouring temperature'.

Interpretation Introduction

(b)

Interpretation:

The superheat temperature needs to be determined.

Concept Introduction:

A cooling curve is a schematic representation of phase change of matter, characteristically from liquid to solid or gaseous to solid.

The temperature is plotted on Y-axis.

The time is plotted on X-axis.

In this variable, time is independent variable and temperature is a dependent variable.

The initial point of the graph is designated as 'pouring temperature'.

Interpretation Introduction

(c)

Interpretation:

The liquidus temperature needs to be determined.

Concept Introduction:

A cooling curve is a schematic representation of phase change of matter, characteristically from liquid to solid or gaseous to solid.

The temperature is plotted on Y-axis.

The time is plotted on X-axis.

In this variable, time is independent variable and temperature is a dependent variable.

The initial point of the graph is designated as 'pouring temperature'.

Interpretation Introduction

(d)

Interpretation:

The eutectic temperature needs to be determined.

Concept Introduction:

A cooling curve is a schematic representation of phase change of matter, characteristically from liquid to solid or gaseous to solid.

The temperature is plotted on Y-axis.

The time is plotted on X-axis.

In this variable, time is independent variable and temperature is a dependent variable.

The initial point of the graph is designated as 'pouring temperature'.

Interpretation Introduction

(e)

Interpretation:

The freezing range temperature needs to be determined.

Concept Introduction:

A cooling curve is a schematic representation of phase change of matter, characteristically from liquid to solid or gaseous to solid.

The temperature is plotted on Y-axis.

The time is plotted on X-axis.

In this variable, time is independent variable and temperature is a dependent variable.

The initial point of the graph is designated as 'pouring temperature'.

Interpretation Introduction

(f)

Interpretation:

The local solidification time needs to be determined.

Concept Introduction:

A cooling curve is a schematic representation of phase change of matter, characteristically from liquid to solid or gaseous to solid.

The temperature is plotted on Y-axis.

The time is plotted on X-axis.

In this variable, time is independent variable and temperature is a dependent variable.

The initial point of the graph is designated as 'pouring temperature'.

Interpretation Introduction

(g)

Interpretation:

The total solidification temperature needs to be determined.

Concept Introduction:

A cooling curve is a schematic representation of phase change of matter, characteristically from liquid to solid or gaseous to solid.

The temperature is plotted on Y-axis.

The time is plotted on X-axis.

In this variable, time is independent variable and temperature is a dependent variable.

The initial point of the graph is designated as 'pouring temperature'.

Interpretation Introduction

(h)

Interpretation:

The composition of alloy needs to be determined.

Concept Introduction:

Phase diagram is used to represent the thermodynamic conditions for existence of distinct phases of a material. A point at which the free energy becomes non-analytic and there is discontinuous change in coordinates of the derivatives takes place are represented by the curves on the phase diagrams.