Homework 4 - ME 382 Winter 2010 Homework 4 (Due on Friday...

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ME 382 Winter 2010 Homework 4 (Due on Friday Feb. 5, 2010) 1. AJ2-3.1 2 . AJ2-3.2 3 . AJ2-3.4 4 . AJ2-3.5 5 . A. The aluminum-Si binary phase diagram is shown below. An alloy containing 7.0 wt% of Si is slowly cooled in a furnace from 700°C to room temperature. You may assume that the cooling is slow enough so that equilibrium conditions are always satisfied. For each temperature in the table below name the phases present, the composition of each phase, and the mass of each phase present in the crucible. Temperature °C Phases Compositions Masses of Phase 700 580 570 100 B . You are give a second alloy that is 90wt%Al and 10wt%Si that is slowly cooled in a crucible from the molten state at 700°C to 570°C. i. For this alloy what is the wt.% of eutectic microstructure that will be present at 570°C?
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ii. What is the total wt. % of the (Si) phase that is present at 570°C? iii. Sketch the microstructure that will result from slowly cooling this alloy to 570°C.
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This note was uploaded on 05/12/2010 for the course MECHENG 382 taught by Professor Thouless during the Spring '08 term at University of Michigan.

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Homework 4 - ME 382 Winter 2010 Homework 4 (Due on Friday...

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