The composition of the Al-Li alloy needs to be determined. Whether it is hypereutectic and hypoeutectic needs to be explained. Concept introduction: A substance's homogeneous mixture that melts or strengthen at a temperature below either constituent's melting point is a eutectic system. The eutectic temperature for the part species concerned is the lowest melting temperature that is possible over the all combining proportions. It is likely to categorize eutectic systems as hypoeutectic or hypereutectic. The compositions having smaller percentage of β species and greater composition of a than eutectic composition are kniown as hypoeutectic compositions. On the other hand, hypereutectic solutions have a higher β composition and lower a composition than eutectic composition.

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What is the purchase quantity of 2 x 6 rafters needed for the roof and how many pieces of ridge shingles are needed for the roof? The slope of the roof is 4:12 and the exposure is 5 inches wide.

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Question

Chapter 11, Problem 11.36P

Interpretation Introduction

Interpretation:

The composition of the Al-Li alloy needs to be determined. Whether it is hypereutectic and hypoeutectic needs to be explained.

Concept introduction:

A substance's homogeneous mixture that melts or strengthen at a temperature below either constituent's melting point is a eutectic system. The eutectic temperature for the part species concerned is the lowest melting temperature that is possible over the all combining proportions. It is likely to categorize eutectic systems as hypoeutectic or hypereutectic.

The compositions having smaller percentage of β species and greater composition of a than eutectic composition are kniown as hypoeutectic compositions. On the other hand, hypereutectic solutions have a higher β composition and lower a composition than eutectic composition.

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