Brittle Dune Buggy PartsA mechanic who was building a lightweight dune buggy needed some high-strength aluminum parts.  Since he had access to a heat-treating furnace, he decided to do the solution heat-treating and aging process himself.  He obtained 2024 aluminum bars and made the parts.  Then her heat treated the part in a furnace to 1200 deg F., quenched them, and allowed them to age naturally.  He noticed they had small blisters over their surfaces and when he began to hammer one in place, it broke in two places.  What did he do wrong?  Could the parts be salvaged in any way?

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Asked Nov 20, 2019
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Brittle Dune Buggy Parts

A mechanic who was building a lightweight dune buggy needed some high-strength aluminum parts.  Since he had access to a heat-treating furnace, he decided to do the solution heat-treating and aging process himself.  He obtained 2024 aluminum bars and made the parts.  Then her heat treated the part in a furnace to 1200 deg F., quenched them, and allowed them to age naturally.  He noticed they had small blisters over their surfaces and when he began to hammer one in place, it broke in two places.  What did he do wrong?  Could the parts be salvaged in any way?

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Expert Answer

Step 1

Here, the heat-treated aluminum is quenched and allowed to age naturally. This means that the aluminum is allowed to cool down slowly at room temperature. As the air contains oxygen and aluminum is a very active metal, it reacts w...

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