Chapter 9, Problem 9.50P

Interpretation Introduction

(a)

Interpretation:

The secondary dendrite arm spacing for aluminum alloy needs to be determined.

Concept Introduction:

Distance between secondary dendrite arms is termed as SDAS (secondary dendrite arm spacing).

SDAS is given by the following relation:

SDAS=Average SDAS / Magnification.

Interpretation Introduction

(b)

Interpretation:

The local solidification time for aluminum alloy needs to be calculated.

Concept Introduction:

Local solidification time is the time required to release the latent heat of fusion at any location in casting.Distance between secondary dendrite arms is termed as secondary dendrite arm spacing.