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Welding: Principles and Applicatio...

8th Edition
Larry Jeffus
ISBN: 9781305494695

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BuyFindarrow_forward

Welding: Principles and Applicatio...

8th Edition
Larry Jeffus
ISBN: 9781305494695
Textbook Problem
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Using Figure 26-18, answer the following questions:
a. At approximately what temperature does a 70 % lead and 30 % tin mixture become solid?
b. What crystal structure is formed first when a 20 % lead and 80 % tin mixture cools down from a 100 % liquid phase?

To determine

(a)

The temperature at which a 70% lead and 30% tin mixture becomes solid.

Explanation

From the lead-tin phase diagram shown in figure 26-18,

  

Follow the procedure described below:

(1): Draw a vertical line at 70% lead.

(2): Get a point where this vertical line intersects the solid-(solid+liquid) interface line...

To determine

(b)

The crystal structure that is formed earliest when the 100% liquid phase of a mixture of 20% lead and 80% tin cools.

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