Chapter 9, Problem 9.87P

Interpretation Introduction

Interpretation:

The percent volume of gas in solid aluminum needs to be determind.

Concept introduction:

Solidification is a process of forming crystal structure from molten during solidification.

Solidification is the process of forming crystals structure from the molten metal.

Shrinkage is a type of defect occurs in cast product during solidification.

Shrinkage affects the dimensions of casting.

Percent change in volume is calculated by taking the ratio of the initial volume of casting and the final volume of casting after solidification.

% volume change = $\frac{{\text{V}}_{\text{initial}}{\text{-V}}_{\text{final}}}{{\text{V}}_{\text{initial}}}$

Gases dissolve in molten metal which forms pores in molten metal during casting.